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Posted by Mindaugas.Liubinas@gmail.com on 07/17/07 11:00
Did you consider using custom error handler? You will be able to call
it with trigger_error function with custom error levels, plus you can
control where the error message goes (email, log, etc.) Here's an ugly
example:
<?php
// set the user error handler method to be hl_error_handler
set_error_handler("hls_error_handler", E_ALL);
// error handler function
function hls_error_handler($errNo, $errStr, $errFile, $errLine)
{
/* the first two elements of the backtrace array are irrelevant:
-DBG_Backtrace
-outErrorHandler */
$backtrace = dbg_get_backtrace(2);
// error message to be displayed, logged or mailed
$error_message = "\nERRNO: $errNo \nTEXT: " . $errStr . " \n" .
"LOCATION: " . $errFile . ", line " . $errLine . ", at
" .
date("F j, Y, g:i a") . "\nShowing backtrace:\n" .
$backtrace . "\n\n";
// email the error details, in case SEND_ERROR_MAIL is true
if (SEND_ERROR_MAIL == true)
error_log($error_message, 1, ADMIN_ERROR_MAIL, "From: " .
SENDMAIL_FROM . "\r\nTo: " . ADMIN_ERROR_MAIL);
// log the error, in case LOG_ERRORS is true
if (LOG_ERRORS == true)
error_log($error_message, 3, LOG_ERRORS_FILE);
// warnings don't abort execution if IS_WARNING_FATAL is false
// E_NOTICE and E_USER_NOTICE errors don't abort execution
if (($errNo == E_WARNING && IS_WARNING_FATAL == false) ||
($errNo == E_NOTICE || $errNo == E_USER_NOTICE))
// if the error is non-fatal ...
{
// show message only if DEBUGGING is true
if (DEBUGGING == true)
echo "<pre>" . $error_message . "</pre>";
}
else
// if error is fatal ...
{
// show error message
if (DEBUGGING == true)
echo "<pre>" . $error_message . "</pre>";
else
echo SITE_GENERIC_ERROR_MESSAGE;
// stop processing the request
exit;
}
}
// builds backtrace message
function dbg_get_backtrace($irrelevantFirstEntries)
{
$s = '';
$MAXSTRLEN = 64;
$traceArr = debug_backtrace();
for ($i = 0; $i < $irrelevantFirstEntries; $i++)
array_shift($traceArr);
$tabs = sizeof($traceArr) - 1;
foreach($traceArr as $arr)
{
$tabs -= 1;
if (isset($arr['class']))
$s .= $arr['class'] . '.';
$args = array();
if (!empty($arr['args']))
foreach($arr['args']as $v)
{
if (is_null($v))
$args[] = 'null';
else if (is_array($v))
$args[] = 'Array[' . sizeof($v).']';
else if (is_object($v))
$args[] = 'Object:' . get_class($v);
else if (is_bool($v))
$args[] = $v ? 'true' : 'false';
else
{
$v = (string)@$v;
$str = htmlspecialchars(substr($v, 0, $MAXSTRLEN));
if (strlen($v) > $MAXSTRLEN)
$str .= '...';
$args[] = "\"" . $str . "\"";
}
}
$s .= $arr['function'] . '(' . implode(', ', $args) . ')';
$Line = (isset($arr['line']) ? $arr['line']: "unknown");
$File = (isset($arr['file']) ? $arr['file']: "unknown");
$s .= sprintf(" # line %4d, file: %s", $Line, $File, $File);
$s .= "\n";
}
return $s;
}
?>
There are some constants in this example, but they quite self-
explanatory. Function dbg_get_backtrace is dedicated for user-friendly
output and trace. Hope this helps a bit
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