626 lines
14 KiB
PHP
626 lines
14 KiB
PHP
<?php defined('SYSPATH') OR die('No direct script access.');
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/**
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* Array helper.
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*
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* @package Kohana
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* @category Helpers
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* @author Kohana Team
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* @copyright (c) 2007-2012 Kohana Team
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* @license http://kohanaframework.org/license
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*/
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class Kohana_Arr {
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/**
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* @var string default delimiter for path()
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*/
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public static $delimiter = '.';
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/**
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* Tests if an array is associative or not.
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*
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* // Returns TRUE
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* Arr::is_assoc(array('username' => 'john.doe'));
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*
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* // Returns FALSE
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* Arr::is_assoc('foo', 'bar');
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*
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* @param array $array array to check
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* @return boolean
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*/
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public static function is_assoc(array $array)
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{
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// Keys of the array
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$keys = array_keys($array);
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// If the array keys of the keys match the keys, then the array must
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// not be associative (e.g. the keys array looked like {0:0, 1:1...}).
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return array_keys($keys) !== $keys;
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}
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/**
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* Test if a value is an array with an additional check for array-like objects.
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*
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* // Returns TRUE
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* Arr::is_array(array());
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* Arr::is_array(new ArrayObject);
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*
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* // Returns FALSE
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* Arr::is_array(FALSE);
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* Arr::is_array('not an array!');
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* Arr::is_array(Database::instance());
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*
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* @param mixed $value value to check
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* @return boolean
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*/
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public static function is_array($value)
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{
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if (is_array($value))
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{
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// Definitely an array
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return TRUE;
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}
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else
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{
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// Possibly a Traversable object, functionally the same as an array
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return (is_object($value) AND $value instanceof Traversable);
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}
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}
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/**
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* Gets a value from an array using a dot separated path.
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*
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* // Get the value of $array['foo']['bar']
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* $value = Arr::path($array, 'foo.bar');
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*
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* Using a wildcard "*" will search intermediate arrays and return an array.
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*
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* // Get the values of "color" in theme
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* $colors = Arr::path($array, 'theme.*.color');
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*
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* // Using an array of keys
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* $colors = Arr::path($array, array('theme', '*', 'color'));
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*
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* @param array $array array to search
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* @param mixed $path key path string (delimiter separated) or array of keys
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* @param mixed $default default value if the path is not set
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* @param string $delimiter key path delimiter
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* @return mixed
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*/
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public static function path($array, $path, $default = NULL, $delimiter = NULL)
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{
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if ( ! Arr::is_array($array))
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{
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// This is not an array!
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return $default;
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}
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if (is_array($path))
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{
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// The path has already been separated into keys
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$keys = $path;
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}
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else
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{
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if (array_key_exists($path, $array))
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{
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// No need to do extra processing
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return $array[$path];
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}
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if ($delimiter === NULL)
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{
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// Use the default delimiter
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$delimiter = Arr::$delimiter;
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}
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// Remove starting delimiters and spaces
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$path = ltrim($path, "{$delimiter} ");
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// Remove ending delimiters, spaces, and wildcards
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$path = rtrim($path, "{$delimiter} *");
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// Split the keys by delimiter
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$keys = explode($delimiter, $path);
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}
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do
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{
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$key = array_shift($keys);
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if (ctype_digit($key))
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{
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// Make the key an integer
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$key = (int) $key;
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}
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if (isset($array[$key]))
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{
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if ($keys)
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{
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if (Arr::is_array($array[$key]))
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{
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// Dig down into the next part of the path
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$array = $array[$key];
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}
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else
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{
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// Unable to dig deeper
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break;
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}
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}
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else
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{
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// Found the path requested
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return $array[$key];
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}
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}
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elseif ($key === '*')
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{
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// Handle wildcards
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$values = array();
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foreach ($array as $arr)
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{
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if ($value = Arr::path($arr, implode('.', $keys)))
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{
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$values[] = $value;
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}
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}
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if ($values)
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{
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// Found the values requested
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return $values;
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}
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else
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{
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// Unable to dig deeper
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break;
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}
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}
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else
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{
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// Unable to dig deeper
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break;
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}
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}
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while ($keys);
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// Unable to find the value requested
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return $default;
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}
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/**
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* Set a value on an array by path.
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*
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* @see Arr::path()
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* @param array $array Array to update
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* @param string $path Path
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* @param mixed $value Value to set
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* @param string $delimiter Path delimiter
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*/
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public static function set_path( & $array, $path, $value, $delimiter = NULL)
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{
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if ( ! $delimiter)
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{
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// Use the default delimiter
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$delimiter = Arr::$delimiter;
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}
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// The path has already been separated into keys
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$keys = $path;
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if ( ! is_array($path))
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{
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// Split the keys by delimiter
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$keys = explode($delimiter, $path);
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}
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// Set current $array to inner-most array path
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while (count($keys) > 1)
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{
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$key = array_shift($keys);
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if (ctype_digit($key))
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{
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// Make the key an integer
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$key = (int) $key;
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}
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if ( ! isset($array[$key]))
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{
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$array[$key] = array();
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}
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$array = & $array[$key];
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}
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// Set key on inner-most array
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$array[array_shift($keys)] = $value;
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}
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/**
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* Fill an array with a range of numbers.
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*
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* // Fill an array with values 5, 10, 15, 20
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* $values = Arr::range(5, 20);
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*
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* @param integer $step stepping
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* @param integer $max ending number
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* @return array
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*/
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public static function range($step = 10, $max = 100)
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{
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if ($step < 1)
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return array();
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$array = array();
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for ($i = $step; $i <= $max; $i += $step)
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{
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$array[$i] = $i;
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}
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return $array;
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}
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/**
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* Retrieve a single key from an array. If the key does not exist in the
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* array, the default value will be returned instead.
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*
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* // Get the value "username" from $_POST, if it exists
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* $username = Arr::get($_POST, 'username');
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*
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* // Get the value "sorting" from $_GET, if it exists
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* $sorting = Arr::get($_GET, 'sorting');
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*
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* @param array $array array to extract from
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* @param string $key key name
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* @param mixed $default default value
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* @return mixed
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*/
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public static function get($array, $key, $default = NULL)
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{
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return isset($array[$key]) ? $array[$key] : $default;
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}
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/**
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* Retrieves multiple paths from an array. If the path does not exist in the
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* array, the default value will be added instead.
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*
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* // Get the values "username", "password" from $_POST
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* $auth = Arr::extract($_POST, array('username', 'password'));
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*
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* // Get the value "level1.level2a" from $data
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* $data = array('level1' => array('level2a' => 'value 1', 'level2b' => 'value 2'));
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* Arr::extract($data, array('level1.level2a', 'password'));
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*
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* @param array $array array to extract paths from
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* @param array $paths list of path
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* @param mixed $default default value
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* @return array
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*/
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public static function extract($array, array $paths, $default = NULL)
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{
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$found = array();
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foreach ($paths as $path)
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{
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Arr::set_path($found, $path, Arr::path($array, $path, $default));
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}
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return $found;
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}
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/**
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* Retrieves muliple single-key values from a list of arrays.
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*
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* // Get all of the "id" values from a result
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* $ids = Arr::pluck($result, 'id');
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*
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* [!!] A list of arrays is an array that contains arrays, eg: array(array $a, array $b, array $c, ...)
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*
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* @param array $array list of arrays to check
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* @param string $key key to pluck
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* @return array
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*/
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public static function pluck($array, $key)
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{
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$values = array();
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foreach ($array as $row)
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{
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if (isset($row[$key]))
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{
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// Found a value in this row
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$values[] = $row[$key];
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}
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}
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return $values;
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}
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/**
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* Adds a value to the beginning of an associative array.
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*
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* // Add an empty value to the start of a select list
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* Arr::unshift($array, 'none', 'Select a value');
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*
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* @param array $array array to modify
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* @param string $key array key name
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* @param mixed $val array value
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* @return array
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*/
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public static function unshift( array & $array, $key, $val)
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{
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$array = array_reverse($array, TRUE);
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$array[$key] = $val;
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$array = array_reverse($array, TRUE);
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return $array;
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}
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/**
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* Recursive version of [array_map](http://php.net/array_map), applies one or more
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* callbacks to all elements in an array, including sub-arrays.
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*
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* // Apply "strip_tags" to every element in the array
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* $array = Arr::map('strip_tags', $array);
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*
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* // Apply $this->filter to every element in the array
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* $array = Arr::map(array(array($this,'filter')), $array);
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*
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* // Apply strip_tags and $this->filter to every element
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* $array = Arr::map(array('strip_tags',array($this,'filter')), $array);
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*
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* [!!] Because you can pass an array of callbacks, if you wish to use an array-form callback
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* you must nest it in an additional array as above. Calling Arr::map(array($this,'filter'), $array)
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* will cause an error.
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* [!!] Unlike `array_map`, this method requires a callback and will only map
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* a single array.
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*
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* @param mixed $callbacks array of callbacks to apply to every element in the array
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* @param array $array array to map
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* @param array $keys array of keys to apply to
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* @return array
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*/
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public static function map($callbacks, $array, $keys = NULL)
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{
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foreach ($array as $key => $val)
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{
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if (is_array($val))
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{
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$array[$key] = Arr::map($callbacks, $array[$key]);
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}
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elseif ( ! is_array($keys) OR in_array($key, $keys))
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{
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if (is_array($callbacks))
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{
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foreach ($callbacks as $cb)
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{
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$array[$key] = call_user_func($cb, $array[$key]);
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}
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}
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else
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{
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$array[$key] = call_user_func($callbacks, $array[$key]);
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}
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}
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}
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return $array;
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}
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/**
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* Recursively merge two or more arrays. Values in an associative array
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* overwrite previous values with the same key. Values in an indexed array
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* are appended, but only when they do not already exist in the result.
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*
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* Note that this does not work the same as [array_merge_recursive](http://php.net/array_merge_recursive)!
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*
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* $john = array('name' => 'john', 'children' => array('fred', 'paul', 'sally', 'jane'));
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* $mary = array('name' => 'mary', 'children' => array('jane'));
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*
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* // John and Mary are married, merge them together
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* $john = Arr::merge($john, $mary);
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*
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* // The output of $john will now be:
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* array('name' => 'mary', 'children' => array('fred', 'paul', 'sally', 'jane'))
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*
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* @param array $array1 initial array
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* @param array $array2,... array to merge
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* @return array
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*/
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public static function merge($array1, $array2)
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{
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if (Arr::is_assoc($array2))
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{
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foreach ($array2 as $key => $value)
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{
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if (is_array($value)
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AND isset($array1[$key])
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AND is_array($array1[$key])
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)
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{
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$array1[$key] = Arr::merge($array1[$key], $value);
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}
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else
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{
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$array1[$key] = $value;
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}
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}
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}
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else
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{
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foreach ($array2 as $value)
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{
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if ( ! in_array($value, $array1, TRUE))
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{
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$array1[] = $value;
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}
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}
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}
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if (func_num_args() > 2)
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{
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foreach (array_slice(func_get_args(), 2) as $array2)
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{
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if (Arr::is_assoc($array2))
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{
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foreach ($array2 as $key => $value)
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{
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if (is_array($value)
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AND isset($array1[$key])
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AND is_array($array1[$key])
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)
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{
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$array1[$key] = Arr::merge($array1[$key], $value);
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}
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else
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{
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$array1[$key] = $value;
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}
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}
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}
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else
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{
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foreach ($array2 as $value)
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{
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if ( ! in_array($value, $array1, TRUE))
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{
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$array1[] = $value;
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}
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}
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}
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}
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}
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return $array1;
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}
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/**
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* Overwrites an array with values from input arrays.
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* Keys that do not exist in the first array will not be added!
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*
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* $a1 = array('name' => 'john', 'mood' => 'happy', 'food' => 'bacon');
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* $a2 = array('name' => 'jack', 'food' => 'tacos', 'drink' => 'beer');
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*
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* // Overwrite the values of $a1 with $a2
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* $array = Arr::overwrite($a1, $a2);
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*
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* // The output of $array will now be:
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* array('name' => 'jack', 'mood' => 'happy', 'food' => 'tacos')
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*
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* @param array $array1 master array
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* @param array $array2 input arrays that will overwrite existing values
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* @return array
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*/
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public static function overwrite($array1, $array2)
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{
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foreach (array_intersect_key($array2, $array1) as $key => $value)
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{
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$array1[$key] = $value;
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}
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if (func_num_args() > 2)
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{
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foreach (array_slice(func_get_args(), 2) as $array2)
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{
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foreach (array_intersect_key($array2, $array1) as $key => $value)
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{
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$array1[$key] = $value;
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}
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}
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}
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return $array1;
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}
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/**
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* Creates a callable function and parameter list from a string representation.
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* Note that this function does not validate the callback string.
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*
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* // Get the callback function and parameters
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* list($func, $params) = Arr::callback('Foo::bar(apple,orange)');
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*
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* // Get the result of the callback
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* $result = call_user_func_array($func, $params);
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*
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* @param string $str callback string
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* @return array function, params
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*/
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public static function callback($str)
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{
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// Overloaded as parts are found
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$command = $params = NULL;
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// command[param,param]
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if (preg_match('/^([^\(]*+)\((.*)\)$/', $str, $match))
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{
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// command
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$command = $match[1];
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if ($match[2] !== '')
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{
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// param,param
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$params = preg_split('/(?<!\\\\),/', $match[2]);
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$params = str_replace('\,', ',', $params);
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}
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}
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else
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{
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// command
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$command = $str;
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}
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if (strpos($command, '::') !== FALSE)
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{
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// Create a static method callable command
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$command = explode('::', $command, 2);
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}
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return array($command, $params);
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}
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/**
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* Convert a multi-dimensional array into a single-dimensional array.
|
|
*
|
|
* $array = array('set' => array('one' => 'something'), 'two' => 'other');
|
|
*
|
|
* // Flatten the array
|
|
* $array = Arr::flatten($array);
|
|
*
|
|
* // The array will now be
|
|
* array('one' => 'something', 'two' => 'other');
|
|
*
|
|
* [!!] The keys of array values will be discarded.
|
|
*
|
|
* @param array $array array to flatten
|
|
* @return array
|
|
* @since 3.0.6
|
|
*/
|
|
public static function flatten($array)
|
|
{
|
|
$is_assoc = Arr::is_assoc($array);
|
|
|
|
$flat = array();
|
|
foreach ($array as $key => $value)
|
|
{
|
|
if (is_array($value))
|
|
{
|
|
$flat = array_merge($flat, Arr::flatten($value));
|
|
}
|
|
else
|
|
{
|
|
if ($is_assoc)
|
|
{
|
|
$flat[$key] = $value;
|
|
}
|
|
else
|
|
{
|
|
$flat[] = $value;
|
|
}
|
|
}
|
|
}
|
|
return $flat;
|
|
}
|
|
|
|
}
|