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<?php
/*
** $Id$
**
** debug.class - Debug Functionality for ITools
**
** ITools - the Internet Tools Library
**
** Copyright (C) 1995-2003 by the ITools Authors.
** This program is free software; you can redistribute it and/or
** modify it under the terms of either the GNU General Public License
** or the GNU Lesser General Public License, as published by the Free
** Software Foundation. See http://www.gnu.org/licenses/ for details.
*/
/**
* Debug functions
*/
class it_debug
{
var $level;
var $email;
var $subject;
var $from;
/**
* Constructor
* @param $level Debug level. All debug() calls with a level <= $level are shown.
* @param $email E-mail address for mail() and internal_error() functions.
* @param $subject Subject of e-mail messages
* @see ::debug(), ::mail(), ::internal_error()
*/
function it_debug($level=0, $email="itools@gna.ch", $subject=null)
{
$this->level = isset($GLOBALS['debug_level']) ? $GLOBALS['debug_level'] : $level;
$this->email = $email;
$this->subject = isset($subject) ? $subject : 'ITools error ('.$_SERVER['HTTP_HOST'].') on '.getenv('HOSTNAME');
$this->from = 'From: "it_debug '.getenv('HOSTNAME').'" <itools@'.$_SERVER['SERVER_NAME'].'>';
}
/**
* Output a message if the global debug level is higher or the same as $level
* @param $text Message to display
* @param $level Debug level
*/
function debug($text, $level = 0)
{
if ($this->level >= $level)
{
echo (isset($_SERVER['REMOTE_ADDR']) ? nl2br("$level $text\n") : "$level $text")."\n";
flush();
}
}
/**
* Send an e-mail to this debug object's maintainer
* @param $text Text of mail message
* @param $level Debug level - Mail is only sent if this is <= the global debug level
*/
function mail($text, $level = 0)
{
if ($this->level >= $level)
{
if ($this->email)
mail($this->email, $this->subject, $_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']."\n".$_SERVER['SCRIPT_FILENAME']."\n\n".$text, $this->from);
else
error_log("missing debug email addr: " . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] . " " . substr($text,0,200));
}
}
/**
* Display error message or maintenance page and terminate processing. Mail message and vardump to maintainer
* @param $text Message to display
* @return This function never returns
*/
function internal_error($text)
{
$text = "Host: ".getenv('HOSTNAME')."\nPage: //{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}\nFile: {$_SERVER['SCRIPT_FILENAME']}\n\n$text\n\n";
if ($this->email)
mail($this->email, $this->subject, $text.'$_REQUEST: '.print_r($_REQUEST, true). "\nStack:\n" . print_r(debug_backtrace(), true), $this->from);
else
error_log("missing debug email addr: " . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] . " " . substr($text,0,200));
/* If we have a maintenance display page show this instead of error */
if (file_exists($_SERVER['DOCUMENT_ROOT'].'/maintenance.html'))
{
header("Location: http://{$_SERVER['HTTP_HOST']}/maintenance.html");
exit;
}
else
fail("<pre>Internal Error:\n\n$text");
}
/**
* Function to return dump of all it's parameters,
* normally used through D(), ED(), EDX() in support.pinc
* @param Varargs of mixed stuff to dump
* @return String representation of dump
*/
function dump()
{
$stack = debug_backtrace();
$line = $stack[2]['line'];
$file = $stack[2]['file'];
if (!$_SERVER['REMOTE_ADDR'] && preg_match('/class/', $file))
$line--;
if (ereg('(csv|txt|gif|jpg)', $_SERVER['PHP_SELF']) || !ereg('Mozilla', $_SERVER['HTTP_USER_AGENT']))
$plain = 1;
else if ($_SERVER['REMOTE_ADDR'])
{
$blue = "<span style='color:#00c'>";
$noblue = "</span>";
}
else if (getenv('USER') != 'cschneid') # ;)
{
$blue = "\033[34m";
$noblue = "\033[m";
$red = "\033[31m";
$nored = "\033[m";
}
if (!isset($GLOBALS['it_debug::dump source'][$file]))
$GLOBALS['it_debug::dump source'][$file] = file($file);
$src = $GLOBALS['it_debug::dump source'][$file][$line-1];
$paramlist = preg_match('/(D|ED|EDC|EDX)\s*\(\s*([^)]+)/i', $src, $parts) ? $parts[2] : "";
$argnames = preg_split('/\s*,\s*/', $paramlist);
foreach (func_get_args() as $arg)
{
$var = array_shift($argnames);
if ($arg==='_ignoreme')
continue;
$item = gettype($arg) == 'resource' ? trim(print_r($arg, true)) : trim(var_export($arg, true));
$item = preg_replace("#(=>?)\s*\n\s*(array|class)#", '$1 $2', $item); # array( and class on same line as key
$item = preg_replace('#array \(\s+([^({,;]+),\s+\)#', 'array( $1 )', $item); # 1-element arrays on 1 line
$item = preg_replace('#class (\S+) \{\s+([^({,;]+;)?\s+\}#', 'class $1 { $2 }', $item); # 1-element objects on 1 line
#$item = preg_replace('#\{\s*var \$attr#', '{ var $attr', $item); # move $attr on same line
$item = preg_replace("#\\(\s*\n\s*\\)#", "()", $item); # empty arrays on 1 line
#$item = preg_replace('#\s+var \$_(.|\n)*?;\s*\n#', "", $item);
$item = "$red$item$nored";
if (isset($_SERVER['REMOTE_ADDR']) && !$plain)
$item = htmlspecialchars($item);
if (ereg('^[\'"]', $var))
$r .= "$item ";
else {
$var = "$blue$var=$noblue";
$r .= preg_match("/\n/", $item) ? "\n$var$item\n" : "$var$item ";
}
}
if ($GLOBALS['debug_indent'])
$r = str_repeat(" ", count(debug_backtrace())-3) . $r;
if (isset($_SERVER['REMOTE_ADDR']) && !$plain)
return "<pre style='color:#c00; text-align:left; background-color:white; margin:0'>$r</pre>\n";
else
return "$r\n";
}
function backtrace()
{
foreach (array_slice(debug_backtrace(), 1) as $call)
$line .= basename($call['file']) . ":" . $call['line'] . " ";
return $line;
}
}
?>
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