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<?php
/* Reminder: always indent with 4 spaces (no tabs). */
// +---------------------------------------------------------------------------+
// | Copyright (c) 2008, Demian Turner |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +---------------------------------------------------------------------------+
// | Seagull 0.6 |
// +---------------------------------------------------------------------------+
// | ErrorHandler.php |
// +---------------------------------------------------------------------------+
// | Authors: Peter James <petej@shaman.ca> |
// | Demian Turner <demian@phpkitchen.com> |
// +---------------------------------------------------------------------------+
// $Id: ErrorHandler.php,v 1.8 2005/05/28 19:32:12 demian Exp $
// This class is based on Peter James' class of the same name, for more info
// see http://php.shaman.ca/
/**
* Global error handler class, modifies behaviour for PHP errors, not PEAR.
*
* @package SGL
* @author Demian Turner <demian@phpkitchen.com>
* @author Peter James
* @version $Revision: 1.8 $
*/
class SGL_ErrorHandler
{
var $errorType = array();
var $sourceContextOptions = array();
/**
* Constructor.
*
* @access public
* @return void
*/
public function SGL_ErrorHandler()
{
// first dimension elements are PHP error types
// 2nd dimension elements are roughly PEAR Log's equivalents
// nb: comment out Notice for equivalent of
// error_reporting(E_ALL ^ E_NOTICE);
$this->errorType = array (
1 => array('Error', 3),
2 => array('Warning', 4),
4 => array('Parsing Error', 3),
8 => array('Notice', 5),
16 => array('Core Error', 3),
32 => array('Core Warning', 4),
64 => array('Compile Error', 3),
128 => array('Compile Warning', 4),
256 => array('User Error', 3),
512 => array('User Warning', 4),
1024=> array('User Notice', 5),
2047=> array('All', 7)
);
$this->sourceContextOptions = array('lines' => 5);
}
/**
* BC hack to assign custom error handler in a method.
*
* @access public
* @return void
*/
public function startHandler()
{
$GLOBALS['_SGL']['ERROR_HANDLER_OBJECT'] = & $this;
$GLOBALS['_SGL']['ERROR_HANDLER_METHOD'] = 'errHandler';
// inner function to handle redirection to a class method
function eh($errNo, $errStr, $file, $line, $context)
{
call_user_func(array(
&$GLOBALS['_SGL']['ERROR_HANDLER_OBJECT'],
$GLOBALS['_SGL']['ERROR_HANDLER_METHOD']),
$errNo, $errStr, $file, $line, $context
);
}
// start handling errors
set_error_handler('eh');
}
/**
* Enhances PHP's default error handling.
*
* o overrides notices in certain cases
* o obeys @muffled errors,
* o error logged to selected target
* o context info presented for developer
* o error data emailed to admin if threshold passed
*
* @access public
* @param int $errNo PHP's error number
* @param string $errStr PHP's error message
* @param string $file filename where error occurred
* @param int $line line number where error occurred
* @param string $context contextual info
* @return void
*/
public function errHandler($errNo, $errStr, $file, $line, $context)
{
// if an @ error suppression operator has been detected (0) return null
if (error_reporting() == 0) {
return null;
}
// or if notices are temporarily being suppressed, return null
if ($GLOBALS['_SGL']['ERROR_OVERRIDE'] == true) {
if (error_reporting() == E_ALL ^ E_NOTICE) {
return null;
}
}
if (in_array($errNo, array_keys($this->errorType))) {
$c = SGL_Config::singleton();
$conf = $c->getAll();
// final param is 2nd dimension element from errorType array,
// representing PEAR error codes mapped to PHP's
// also, error obj is stored in $GLOBALS['_SGL']['ERRORS']
// in the logMessage method
SGL::logMessage($errStr, $file, $line, $this->errorType[$errNo][1]);
// if a debug sesssion has been started, or the site in in
// development mode, send error info to screen
if (!$conf['debug']['production'] || SGL_Session::get('adminMode')) {
$source = $this->_getSourceContext($file, $line);
// generate screen debug html
// type is 1st dimension element from $errorType array, ie,
// PHP error code
$output = <<<EOF
<hr />
<div id="errorWrapper" class="errorContent">
<strong>MESSAGE</strong>: $errStr<br />
<strong>TYPE:</strong> {$this->errorType[$errNo][0]}<br />
<strong>FILE:</strong> $file<br />
<strong>LINE:</strong> $line<br />
<strong>DEBUG INFO:</strong>
<p>$source</p>
</div>
<hr />
EOF;
if (SGL::runningFromCLI()) {
$output = <<<EOL
MESSAGE: $errStr
TYPE: {$this->errorType[$errNo][0]}
FILE: $file
LINE: $line
--
EOL;
}
if (!empty($conf['log']['showErrors']) && $conf['log']['showErrors'] == true) {
echo $output;
}
} else {
// we're in production mode, suppress any errors from being displayed
@ini_set('display_errors', 0);
}
// email the error to admin if threshold reached
if ($this->errorType[$errNo][1] <= SGL_EMAIL_ADMIN_THRESHOLD) {
// get extra info
$dbh = SGL_DB::singleton();
$aExtraInfo['callingURL'] = $_SERVER['SCRIPT_NAME'];
$aExtraInfo['lastSQL'] = isset($dbh->last_query) ?
$dbh->last_query : null;
$aExtraInfo['userID'] = SGL_Session::get('uid');
$aExtraInfo['clientData']['HTTP_REFERER'] = isset($_SERVER['HTTP_REFERER'])
? $_SERVER['HTTP_REFERER']
: null;
$aExtraInfo['clientData']['HTTP_USER_AGENT'] = isset($_SERVER['HTTP_USER_AGENT'])
? $_SERVER['HTTP_USER_AGENT']
: null;
$aExtraInfo['clientData']['REMOTE_ADDR'] = isset($_SERVER['REMOTE_ADDR'])
? $_SERVER['REMOTE_ADDR']
: null;
$aExtraInfo['clientData']['SERVER_PORT'] = isset($_SERVER['SERVER_PORT'])
? $_SERVER['SERVER_PORT']
: null;
// store formatted output
$info = print_r($aExtraInfo, true);
// rebuild error output w/out html
$crlf = SGL_String::getCrlf();
$output = $errStr . $crlf .
'type: ' . $this->errorType[$errNo][0] . $crlf .
'file: ' . $file . $crlf .
'line: ' . $line . $crlf . $crlf;
$message = $output . $info;
@mail($conf['email']['admin'], 'ERROR OUTPUT FROM ' .
$conf['site']['name'], $message);
}
}
}
/**
* Provides enhanced error info for developer.
*
* Gives 10 lines before and after error occurred, hightlight erroroneous
* line in red.
*
* @access private
* @param string $file filename where error occurred
* @param int $line line number where error occurred
* @param string $context contextual info
* @return string contextual error info
*/
private function _getSourceContext($file, $line)
{
$sourceContext = null;
// check that file exists
if (!is_file($file)) {
$sourceContext = "Context cannot be shown - ($file) does not exist";
// check if line number is valid
} elseif ((!is_int($line)) || ($line <= 0)) {
$sourceContext = "Context cannot be shown - ($line) is an invalid line number";
} else {
$lines = file($file);
// get the source ## core dump in windows, scrap colour highlighting :-(
// $source = highlight_file($file, true);
// $lines = split("<br />", $source);
// get line numbers
$start = $line - $this->sourceContextOptions['lines'] - 1;
$finish = $line + $this->sourceContextOptions['lines'];
// get lines
if ($start < 0) {
$start = 0;
}
if ($start >= count($lines)) {
$start = count($lines) -1;
}
for ($i = $start; $i < $finish; $i++) {
// highlight line in question
if ($i == ($line - 1)) {
$context_lines[] = '<div class="error"><strong>' . ($i + 1) .
"\t" . strip_tags($lines[$line -1]) . '</strong></div>';
} else {
$context_lines[] = '<strong>' . ($i + 1) .
"</strong>\t" . @$lines[$i];
}
}
$sourceContext = trim(join("<br />\n", $context_lines)) . "<br />\n";
}
return $sourceContext;
}
}
?>
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