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Backtrace Errors

View backtrace-errors.php
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<?php
// Forked from: http://stackoverflow.com/questions/1159216/how-can-i-get-php-to-produce-a-backtrace-upon-errors/1159235#1159235
function process_error_backtrace($errno, $errstr, $errfile, $errline) {
if(!(error_reporting() & $errno))
return;
switch($errno) {
case E_WARNING :
case E_USER_WARNING :
case E_STRICT :
case E_NOTICE :
case E_DEPRECATED :
case E_USER_NOTICE :
$type = 'warning';
$fatal = false;
break;
default :
$type = 'fatal error';
$fatal = true;
break;
}
$trace = debug_backtrace();
array_shift($trace);
if(php_sapi_name() == 'cli') {
echo 'Backtrace from ' . $type . ' \'' . $errstr . '\' at ' . $errfile . ' ' . $errline . ':' . "\n";
foreach($trace as $item)
echo ' ' . (isset($item['file']) ? $item['file'] : '<unknown file>') . ' ' . (isset($item['line']) ? $item['line'] : '<unknown line>') . ' calling ' . $item['function'] . '()' . "\n";
} else {
echo '<p class="error_backtrace">' . "\n";
echo ' Backtrace from ' . $type . ' \'' . $errstr . '\' at ' . $errfile . ' ' . $errline . ':' . "\n";
echo ' <ol>' . "\n";
foreach($trace as $item)
echo ' <li>' . (isset($item['file']) ? $item['file'] : '<unknown file>') . ' ' . (isset($item['line']) ? $item['line'] : '<unknown line>') . ' calling ' . $item['function'] . '()</li>' . "\n";
echo ' </ol>' . "\n";
echo '</p>' . "\n";
}
if(ini_get('log_errors')) {
$items = array();
foreach($trace as $item)
$items[] = (isset($item['file']) ? $item['file'] : '<unknown file>') . ' ' . (isset($item['line']) ? $item['line'] : '<unknown line>') . ' calling ' . $item['function'] . '()';
$message = 'Backtrace from ' . $type . ' \'' . $errstr . '\' at ' . $errfile . ' ' . $errline . ': ' . join(' | ', $items);
error_log($message);
}
flush();
if($fatal)
exit(1);
}
set_error_handler('process_error_backtrace');

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