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GuilhermeRossato/ErrorHandler.php

Created October 18, 2018 01:23
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Small PHP Error handler to format every error and show where the error happened
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ErrorHandler.php
<?php
$error_was_already_triggered = false;
function process_error_handler($errno, $errstr, $errfile, $errline) {
global $error_was_already_triggered;
$error_is_marked_as_ignored = (error_reporting() == 0);
if ($error_is_marked_as_ignored || $error_was_already_triggered) {
return;
}
$error_was_already_triggered = true;
date_default_timezone_set('America/Sao_Paulo');
/* Treat backtrace */
ob_start();
debug_print_backtrace();
$backtrace = ob_get_contents();
// Remove this function
$backtrace = preg_replace('/#\d+\s+process_error_handler(?:.|\n)+?\n(\#\d)/', '\1', $backtrace);
$backtrace = preg_replace('/#\d+\s+fatal_error_handler(?:.|\n)+?\n(\#\d)/', '\1', $backtrace);
ob_end_clean();
$backtrace_list = [];
foreach (explode("\n", $backtrace) as $raw_line) {
$obj = [];
$line = (strpos($raw_line, "#") !== false)?substr($raw_line, strpos($raw_line, " ")+1):$raw_line;
$file_prefix = $_SERVER["DOCUMENT_ROOT"];
if (strpos($line, $file_prefix) !== false) {
if (strpos($line, "(") !== false) {
$obj["file"] = substr($line, 0, strpos($line, "("));
$obj["line"] = substr($line, strpos($line, "(")+1, strpos($line, ")")-strpos($line, "(")-1);
$obj["function"] = substr($line, strpos($line, ": ")+2, strrpos($line, "(")-strpos($line, ": ")-2);
$obj["args"] = array_map(function ($par) { return trim($par); }, explode(",",trim(substr($line, strrpos($line, "(")+1), ")")));
} else {
$obj["discarted"] = $line;
}
array_push($backtrace_list, $obj);
}
}
// Collect environment
ob_start();
phpinfo(INFO_VARIABLES);
$environment_info = ob_get_contents();
ob_end_clean();
$data_match = '/\<td class="e"\>([^<]+)\<\/td\>\<td class="v"\>([^<]+)\<\/td\>/';
preg_match_all($data_match, $environment_info, $environment_data);
array_shift($environment_data);
$environment = array();
for ($i = 0; $i < count($environment_data[0]); $i++) array_push($environment, $environment_data[0][$i] . ': ' . $environment_data[1][$i]);
$environment = implode("\n", $environment);
http_response_code(500);
?>
<html>
<head>
<title>Whoops!</title>
<!-- <link rel="stylesheet" type="text/css" class="ui" href="https://semantic-ui.com/dist/semantic.min.css"> -->
<style>
.grid-container {
display: grid;
grid-template-columns: 330px auto;
}
.grid-container > * {
display: inline-grid
}
</style>
</head>
<body style="display:flex;justify-content:center;align-items:center;flex-wrap:wrap;">
<div class="grid-container" style="display:grid">
<div class="title" style="grid-column:1/3;text-align:center"><h1>Whoops!</h1></div>
<div class="message"><p><?php
echo $errstr; ?></p></div>
<div class="backtrace"><pre><?php echo json_encode($backtrace_list, JSON_PRETTY_PRINT); ?></pre></div>
<div class="environment"><p><?php
echo $environment; ?></p></div>
</div>
</body>
</html>
<?php
exit(1);
}
function fatal_error_handler() {
$error = error_get_last();
if ($error !== NULL) {
$errno = $error["type"];
$errfile = $error["file"];
$errline = $error["line"];
$errstr = $error["message"];
process_error_handler($errno, $errstr, $errfile, $errline);
}
}
define('DISPLAY_ERRORS', TRUE);
define('ERROR_REPORTING', E_ALL | E_STRICT);
define('LOG_ERRORS', TRUE);
ini_set('display_errors', 0);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
register_shutdown_function("fatal_error_handler");
set_error_handler('process_error_handler', E_ALL & E_NOTICE & E_STRICT & E_DEPRECATED);
?>
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