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(PHP 5 >= 5.2.0)
error_get_last — Liefert den zuletzt aufgetretenen Fehler
Liefert Informationen über den zuletzt aufgetretenen Fehler
Gibt ein assoziatives Array zurück das den zuletzt aufgetretenen Fehler mit den Elementen "type" (für die Art des Fehlers), "message" (für die Fehlermeldung) sowie "file" und "line" (für den Ort an dem der Fehler aufgetreten ist) beschreibt. Wenn bisher noch kein Fehler aufgetreten ist, wird NULL zurückgegeben.
Beispiel #1 error_get_last()-Beispiel
<?php
echo $a;
print_r(error_get_last());
?>
Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
Array
(
[type] => 8
[message] => Undefined variable: a
[file] => C:\WWW\index.php
[line] => 2
)
If an error handler (see set_error_handler ) successfully handles an error then that error will not be reported by this function.
Function error_get_last() will return an error information even if the error is hidden because you've used character @, because of the "error_reporting" directive in the php.ini file, or because you've used function error_reporting().
Examples:
<?php
error_reporting(E_ALL ^ E_NOTICE);
$y = $x;
$err = error_get_last();
var_export($err);
?>
Will display: array ( 'type' => 8, 'message' => 'Undefined variable: x', 'file' => 'test.php', 'line' => 4, )
<?php
$y = @$x;
$err = error_get_last();
var_export($err);
?>
Will display: array ( 'type' => 8, 'message' => 'Undefined variable: x', 'file' => 'test.php', 'line' => 4, )
If you have the need to check whether an error was a fatal error before PHP 5.2 (in my case, within an output buffer handler), you can use the following hack:
<?php
# Check if there was a PHP fatal error.
# Using error_get_last is the "right" way, but it requires PHP 5.2+. The back-up is a hack.
if (function_exists('error_get_last')) {
$lastPHPError = error_get_last();
$phpFatalError = isset($lastPHPError) && $lastPHPError['type'] === E_ERROR;
} else {
$phpFatalError = strstr($output, '<b>Fatal error</b>:') && ! strstr($output, '</html>');
}
?>
This is, of course, language-dependent, so it wouldn't be good in widely-distributed code, but it may help in certain cases (or at least be the base of something that would work).
Beware that registing a shutdown function to catch errors won't work if other shutdown functions throw errors.
<?php
register_shutdown_function('cleanupObjects');
register_shutdown_function('handleFatalPhpError');
function cleanupObjects() {
trigger_error('An insignificant problem', E_USER_WARNING);
}
function handleFatalPhpError() {
$last_error = error_get_last();
if($last_error['type'] === E_ERROR || $last_error['type'] === E_USER_ERROR) {
echo "Can do custom output and/or logging for fatal error here...";
}
}
trigger_error('Something serious', E_USER_ERROR);
?>
In the above code, $last_error will contain the warning, becuase cleanupObjects() is called first.
The error_get_last() function will give you the most recent error even when that error is a Fatal error.
Example Usage:
<?php
register_shutdown_function('handleFatalPhpError');
function handleFatalPhpError() {
$last_error = error_get_last();
if($last_error['type'] === E_ERROR) {
echo "Can do custom output and/or logging for fatal error here...";
}
}
?>
While mail at mbaierl dot com makes the point that this function isn't best for reporting the possible error condition of the most recently executed step, there are situations in which it is especially helpful to know the last error—regardless of when it occurred.
As an example, imagine if you had some code that captured the output from dynamic pages, and cached it for faster delivery to subsequent visitors. A final sanity check would be to see if an error has occurred anywhere during the execution of the script. If there has been an error, we probably don't want to cache that page.
Like $php_errormsg, the return value of this function may not be updated if a user-defined error handler returns non-FALSE. Tested on PHP 5.2.6.
<?php
var_dump(PHP_VERSION);
// Outputs: string(5) "5.2.6"
@trigger_error("foo");
$e=error_get_last();
var_dump($e['message']);
// Outputs: string(3) "foo"
set_error_handler(create_function('$a,$b',''));
@trigger_error("bar");
$e=error_get_last();
var_dump($e['message']);
// Outputs: string(3) "foo"
set_error_handler(create_function('$a,$b','return false;'));
@trigger_error("baz");
$e=error_get_last();
var_dump($e['message']);
// Outputs: string(3) "baz"
?>
It can't be completely reset, but you can "clear" it well enough for all practical purposes:
<?php
@trigger_error("");
// do stuff...
$e=error_get_last();
if($e['message']!==''){
// An error occurred
}
?>
This function is pretty useless, as it can not be reset, so there is no way to know if the error really happened on the line before this function call.
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