<?php defined('SYSPATH') OR die('No direct script access.');
/**
* Contains debugging and dumping tools.
*
* @package Kohana
* @category Base
* @author Kohana Team
* @copyright (c) 2008-2012 Kohana Team
* @license http://kohanaphp.com/license
*/
class Kohana_Debug {
/**
* Returns an HTML string of debugging information about any number of
* variables, each wrapped in a "pre" tag:
*
* // Displays the type and value of each variable
* echo Debug::vars($foo, $bar, $baz);
*
* @param mixed $var,... variable to debug
* @return string
*/
public static function vars()
{
if (func_num_args() === 0)
return;
// Get all passed variables
$variables = func_get_args();
$output = array();
foreach ($variables as $var)
{
$output[] = Debug::_dump($var, 1024);
}
return '<pre class="debug">'.implode("\n", $output).'</pre>';
}
/**
* Returns an HTML string of information about a single variable.
*
* Borrows heavily on concepts from the Debug class of [Nette](http://nettephp.com/).
*
* @param mixed $value variable to dump
* @param integer $length maximum length of strings
* @param integer $level_recursion recursion limit
* @return string
*/
public static function dump($value, $length = 128, $level_recursion = 10)
{
return Debug::_dump($value, $length, $level_recursion);
}
/**
* Helper for Debug::dump(), handles recursion in arrays and objects.
*
* @param mixed $var variable to dump
* @param integer $length maximum length of strings
* @param integer $limit recursion limit
* @param integer $level current recursion level (internal usage only!)
* @return string
*/
protected static function _dump( & $var, $length = 128, $limit = 10, $level = 0)
{
if ($var === NULL)
{
return '<small>NULL</small>';
}
elseif (is_bool($var))
{
return '<small>bool</small> '.($var ? 'TRUE' : 'FALSE');
}
elseif (is_float($var))
{
return '<small>float</small> '.$var;
}
elseif (is_resource($var))
{
if (($type = get_resource_type($var)) === 'stream' AND $meta = stream_get_meta_data($var))
{
$meta = stream_get_meta_data($var);
if (isset($meta['uri']))
{
$file = $meta['uri'];
if (function_exists('stream_is_local'))
{
// Only exists on PHP >= 5.2.4
if (stream_is_local($file))
{
$file = Debug::path($file);
}
}
return '<small>resource</small><span>('.$type.')</span> '.htmlspecialchars($file, ENT_NOQUOTES, Kohana::$charset);
}
}
else
{
return '<small>resource</small><span>('.$type.')</span>';
}
}
elseif (is_string($var))
{
// Clean invalid multibyte characters. iconv is only invoked
// if there are non ASCII characters in the string, so this
// isn't too much of a hit.
$var = UTF8::clean($var, Kohana::$charset);
if (UTF8::strlen($var) > $length)
{
// Encode the truncated string
$str = htmlspecialchars(UTF8::substr($var, 0, $length), ENT_NOQUOTES, Kohana::$charset).' …';
}
else
{
// Encode the string
$str = htmlspecialchars($var, ENT_NOQUOTES, Kohana::$charset);
}
return '<small>string</small><span>('.strlen($var).')</span> "'.$str.'"';
}
elseif (is_array($var))
{
$output = array();
// Indentation for this variable
$space = str_repeat($s = ' ', $level);
static $marker;
if ($marker === NULL)
{
// Make a unique marker
$marker = uniqid("\x00");
}
if (empty($var))
{
// Do nothing
}
elseif (isset($var[$marker]))
{
$output[] = "(\n$space$s*RECURSION*\n$space)";
}
elseif ($level < $limit)
{
$output[] = "<span>(";
$var[$marker] = TRUE;
foreach ($var as $key => & $val)
{
if ($key === $marker) continue;
if ( ! is_int($key))
{
$key = '"'.htmlspecialchars($key, ENT_NOQUOTES, Kohana::$charset).'"';
}
$output[] = "$space$s$key => ".Debug::_dump($val, $length, $limit, $level + 1);
}
unset($var[$marker]);
$output[] = "$space)</span>";
}
else
{
// Depth too great
$output[] = "(\n$space$s...\n$space)";
}
return '<small>array</small><span>('.count($var).')</span> '.implode("\n", $output);
}
elseif (is_object($var))
{
// Copy the object as an array
$array = (array) $var;
$output = array();
// Indentation for this variable
$space = str_repeat($s = ' ', $level);
$hash = spl_object_hash($var);
// Objects that are being dumped
static $objects = array();
if (empty($var))
{
// Do nothing
}
elseif (isset($objects[$hash]))
{
$output[] = "{\n$space$s*RECURSION*\n$space}";
}
elseif ($level < $limit)
{
$output[] = "<code>{";
$objects[$hash] = TRUE;
foreach ($array as $key => & $val)
{
if ($key[0] === "\x00")
{
// Determine if the access is protected or protected
$access = '<small>'.(($key[1] === '*') ? 'protected' : 'private').'</small>';
// Remove the access level from the variable name
$key = substr($key, strrpos($key, "\x00") + 1);
}
else
{
$access = '<small>public</small>';
}
$output[] = "$space$s$access $key => ".Debug::_dump($val, $length, $limit, $level + 1);
}
unset($objects[$hash]);
$output[] = "$space}</code>";
}
else
{
// Depth too great
$output[] = "{\n$space$s...\n$space}";
}
return '<small>object</small> <span>'.get_class($var).'('.count($array).')</span> '.implode("\n", $output);
}
else
{
return '<small>'.gettype($var).'</small> '.htmlspecialchars(print_r($var, TRUE), ENT_NOQUOTES, Kohana::$charset);
}
}
/**
* Removes application, system, modpath, or docroot from a filename,
* replacing them with the plain text equivalents. Useful for debugging
* when you want to display a shorter path.
*
* // Displays SYSPATH/classes/kohana.php
* echo Debug::path(Kohana::find_file('classes', 'kohana'));
*
* @param string $file path to debug
* @return string
*/
public static function path($file)
{
if (strpos($file, APPPATH) === 0)
{
$file = 'APPPATH'.DIRECTORY_SEPARATOR.substr($file, strlen(APPPATH));
}
elseif (strpos($file, MODPATH) === 0)
{
$file = 'MODPATH'.DIRECTORY_SEPARATOR.substr($file, strlen(MODPATH));
}
elseif (strpos($file, SYSPATH) === 0)
{
$file = 'SYSPATH'.DIRECTORY_SEPARATOR.substr($file, strlen(SYSPATH));
}
elseif (strpos($file, SMDPATH) === 0)
{
$file = 'SMDPATH'.DIRECTORY_SEPARATOR.substr($file, strlen(SMDPATH));
}
elseif (strpos($file, DOCROOT) === 0)
{
$file = 'DOCROOT'.DIRECTORY_SEPARATOR.substr($file, strlen(DOCROOT));
}
return $file;
}
/**
* Returns an HTML string, highlighting a specific line of a file, with some
* number of lines padded above and below.
*
* // Highlights the current line of the current file
* echo Debug::source(__FILE__, __LINE__);
*
* @param string $file file to open
* @param integer $line_number line number to highlight
* @param integer $padding number of padding lines
* @return string source of file
* @return FALSE file is unreadable
*/
public static function source($file, $line_number, $padding = 5)
{
if ( ! $file OR ! is_readable($file))
{
// Continuing will cause errors
return FALSE;
}
// Open the file and set the line position
$file = fopen($file, 'r');
$line = 0;
// Set the reading range
$range = array('start' => $line_number - $padding, 'end' => $line_number + $padding);
// Set the zero-padding amount for line numbers
$format = '% '.strlen($range['end']).'d';
$source = '';
while (($row = fgets($file)) !== FALSE)
{
// Increment the line number
if (++$line > $range['end'])
break;
if ($line >= $range['start'])
{
// Make the row safe for output
$row = htmlspecialchars($row, ENT_NOQUOTES, Kohana::$charset);
// Trim whitespace and sanitize the row
$row = '<span class="number">'.sprintf($format, $line).'</span> '.$row;
if ($line === $line_number)
{
// Apply highlighting to this row
$row = '<span class="line highlight">'.$row.'</span>';
}
else
{
$row = '<span class="line">'.$row.'</span>';
}
// Add to the captured source
$source .= $row;
}
}
// Close the file
fclose($file);
return '<pre class="source"><code>'.$source.'</code></pre>';
}
/**
* Returns an array of HTML strings that represent each step in the backtrace.
*
* // Displays the entire current backtrace
* echo implode('<br/>', Debug::trace());
*
* @param array $trace
* @return string
*/
public static function trace(array $trace = NULL)
{
if ($trace === NULL)
{
// Start a new trace
$trace = debug_backtrace();
}
// Non-standard function calls
$statements = array('include', 'include_once', 'require', 'require_once');
$output = array();
foreach ($trace as $step)
{
if ( ! isset($step['function']))
{
// Invalid trace step
continue;
}
if (isset($step['file']) AND isset($step['line']))
{
// Include the source of this step
$source = Debug::source($step['file'], $step['line']);
}
if (isset($step['file']))
{
$file = $step['file'];
if (isset($step['line']))
{
$line = $step['line'];
}
}
// function()
$function = $step['function'];
if (in_array($step['function'], $statements))
{
if (empty($step['args']))
{
// No arguments
$args = array();
}
else
{
// Sanitize the file path
$args = array($step['args'][0]);
}
}
elseif (isset($step['args']))
{
if ( ! function_exists($step['function']) OR strpos($step['function'], '{closure}') !== FALSE)
{
// Introspection on closures or language constructs in a stack trace is impossible
$params = NULL;
}
else
{
if (isset($step['class']))
{
if (method_exists($step['class'], $step['function']))
{
$reflection = new ReflectionMethod($step['class'], $step['function']);
}
else
{
$reflection = new ReflectionMethod($step['class'], '__call');
}
}
else
{
$reflection = new ReflectionFunction($step['function']);
}
// Get the function parameters
$params = $reflection->getParameters();
}
$args = array();
foreach ($step['args'] as $i => $arg)
{
if (isset($params[$i]))
{
// Assign the argument by the parameter name
$args[$params[$i]->name] = $arg;
}
else
{
// Assign the argument by number
$args[$i] = $arg;
}
}
}
if (isset($step['class']))
{
// Class->method() or Class::method()
$function = $step['class'].$step['type'].$step['function'];
}
$output[] = array(
'function' => $function,
'args' => isset($args) ? $args : NULL,
'file' => isset($file) ? $file : NULL,
'line' => isset($line) ? $line : NULL,
'source' => isset($source) ? $source : NULL,
);
unset($function, $args, $file, $line, $source);
}
return $output;
}
}