If you just see a blank page instead of an error reporting and you have no server access so you can't edit php configuration files like php.ini try this:
- create a new file in which you include the faulty script:
<?php
error_reporting(E_ALL);
ini_set("display_errors", 1);
include("file_with_errors.php");
?>
- execute this file instead of the faulty script file
now errors of your faulty script should be reported.
this works fine with me. hope it solves your problem as well!
error_reporting
(PHP 4, PHP 5, PHP 7, PHP 8)
error_reporting — Gibt an, welche PHP-Fehlermeldungen gemeldet werden
Beschreibung
Mit error_reporting() wird die Direktive
error_reporting zur Laufzeit des
Programms gesetzt. In PHP gibt es viele Stufen für die Anzeige von
Fehlermeldungen, die mit dieser Funktion für die Dauer (Laufzeit) des
Skripts eingestellt werden kann. Wenn das optionale Argument
error_level nicht übergeben wird, gibt
error_reporting() die aktuelle Stufe der Fehlermeldungen
zurück.
Parameter-Liste
-
error_level -
Die neue Stufe von error_reporting. Es können sowohl eine numerische Bitmaske als auch benannte Konstanten übergeben werden. Der Einsatz benannter Konstanten wird empfohlen, um die Kompatibilität mit zukünftigen Versionen sicherzustellen. Wann immer Konstanten für Fehlerstufen hinzugefügt werden, erweitert sich der genutzte Integerbereich, sodass ältere Integerkonstanten nicht unbedingt weiter das erwartete Verhalten zeigen.
Die verfügbaren Konstanten und die Bedeutungen der jeweiligen Fehlerstufe sind im Abschnitt Vordefinierte Konstanten beschrieben.
Rückgabewerte
Gibt das Level von
error_reporting zurück,
bevor es auf error_level
geändert wird.
Hinweis: Der Fehlerkontroll-Operator
@ändert den Wert vonerror_levelwährend der Fehlerbehandlung.
Changelog
| Version | Beschreibung |
|---|---|
| 8.0.0 |
error_level ist nun nullable (akzeptiert den
null-Wert).
|
Beispiele
Beispiel #1 error_reporting()-Beispiel
<?php
// Fehlermeldungen komplett abschalten
error_reporting(0);
// Nur einfache Fehler melden
error_reporting(E_ERROR | E_WARNING | E_PARSE);
// E_NOTICE ist sinnvoll, um uninitialisierte oder
// falsch geschriebene Variablen zu entdecken
error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);
// Melde alle Fehler außer E_NOTICE
error_reporting(E_ALL & ~E_NOTICE);
// Melde alle PHP-Fehler
error_reporting(E_ALL);
// Melde alle PHP-Fehler
error_reporting(-1);
// Dies entspricht error_reporting(E_ALL);
ini_set('error_reporting', E_ALL);
?>Anmerkungen
Tipp
Durch Übergeben des Wertes -1 werden alle möglichen
Fehler angezeigt, auch wenn neue Level in zukünftigen PHP-Versionen
hinzugefügt werden. Das Verhalten ist äquivalent zur Übergabe der
Konstante E_ALL.
Siehe auch
- Die Direktive display_errors
- Die Direktive html_errors
- Die Direktive xmlrpc_errors
- Der Operator für die Fehlerkontrolle
- ini_set() - Sets the value of a configuration option
add a note
User Contributed Notes 27 notes
info at hephoz dot de ¶
16 years ago
jcastromail at yahoo dot es ¶
3 years ago
Under PHP 8.0, error_reporting() does not return 0 when then the code uses a @ character.
For example
<?php
$a=$array[20]; // error_reporting() returns 0 in php <8 and 4437 in PHP>=8
?>
dave at davidhbrown dot us ¶
18 years ago
The example of E_ALL ^ E_NOTICE is a 'bit' confusing for those of us not wholly conversant with bitwise operators.
If you wish to remove notices from the current level, whatever that unknown level might be, use & ~ instead:
<?php
//....
$errorlevel=error_reporting();
error_reporting($errorlevel & ~E_NOTICE);
//...code that generates notices
error_reporting($errorlevel);
//...
?>
^ is the xor (bit flipping) operator and would actually turn notices *on* if they were previously off (in the error level on its left). It works in the example because E_ALL is guaranteed to have the bit for E_NOTICE set, so when ^ flips that bit, it is in fact turned off. & ~ (and not) will always turn off the bits specified by the right-hand parameter, whether or not they were on or off.
Fernando Piancastelli ¶
20 years ago
The error_reporting() function won't be effective if your display_errors directive in php.ini is set to "Off", regardless of level reporting you set. I had to set
display_errors = On
error_reporting = ~E_ALL
to keep no error reporting as default, but be able to change error reporting level in my scripts.
I'm using PHP 4.3.9 and Apache 2.0.
kevinson112 at yahoo dot com ¶
6 years ago
I had the problem that if there was an error, php would just give me a blank page. Any error at all forced a blank page instead of any output whatsoever, even though I made sure that I had error_reporting set to E_ALL, display_errors turned on, etc etc. But simply running the file in a different directory allowed it to show errors!
Turns out that the error_log file in the one directory was full (2.0 Gb). I erased the file and now errors are displayed normally. It might also help to turn error logging off.
https://techysupport.co/norton-tech-support/
&IT ¶
4 years ago
error_reporting(E_ALL);
if (!ini_get('display_errors')) {
ini_set('display_errors', '1');
}
ecervetti at orupaca dot fr ¶
15 years ago
It could save two minutes to someone:
E_ALL & ~E_NOTICE integer value is 6135
vdephily at bluemetrix dot com ¶
19 years ago
Note that E_NOTICE will warn you about uninitialized variables, but assigning a key/value pair counts as initialization, and will not trigger any error :
<?php
error_reporting(E_ALL);
$foo = $bar; //notice : $bar uninitialized
$bar['foo'] = 'hello'; // no notice, although $bar itself has never been initialized (with "$bar = array()" for example)
$bar = array('foobar' => 'barfoo');
$foo = $bar['foobar'] // ok
$foo = $bar['nope'] // notice : no such index
?>
roberto at spadim dot com dot br ¶
14 years ago
see more information about php 5.3 deprecated errors
http://php.net/manual/en/migration53.deprecated.php
chris at ocproducts dot com ¶
8 years ago
The error_reporting() function will return 0 if error suppression is currently active somewhere in the call tree (via the @ operator).
luisdev ¶
6 years ago
This article refers to these two reporting levels:
// Report all PHP errors (see changelog)
error_reporting(E_ALL);
// Report all PHP errors
error_reporting(-1);
What is the difference between those two levels?
Please update this article with a clear explanation of the difference and the possible use cases.
lhenry at lhenry dot com ¶
5 years ago
In php7, what was generally a notice or a deprecated is now a warning : the same level of a mysql error … unacceptable for me.
I do have dozen of old projects and I surely d'ont want to define every variable which I eventually wrote 20y ago.
So two option: let php7 degrade my expensive SSDs writing Gb/hours or implement smthing like server level monitoring ( with auto_[pre-ap]pend_file in php.ini) and turn off E_WARNING
Custom overriding the level of php errors should be super handy and flexible …
adam at adamhahn dot com ¶
7 years ago
To expand upon the note by chris at ocproducts dot com. If you prepend @ to error_reporting(), the function will always return 0.
<?php
error_reporting(E_ALL);
var_dump(
error_reporting(), // value of E_ALL,
@error_reporting() // value is 0
);
?>
keithm at aoeex dot com ¶
14 years ago
Some E_STRICT errors seem to be thrown during the page's compilation process. This means they cannot be disabled by dynamically altering the error level at run time within that page.
The work-around for this was to rename the file and replace the original with a error_reporting() call and then a require() call.
Ex, rename index.php to index.inc.php, then re-create index.php as:
<?php
error_reporting(E_ALL & ~(E_STRICT|E_NOTICE));
require('index.inc.php');
?>
That allows you to alter the error reporting prior to the file being compiled.
I discovered this recently when I was given code from another development firm that triggered several E_STRICT errors and I wanted to disable E_STRICT on a per-page basis.
j dot schriver at vindiou dot com ¶
24 years ago
error_reporting() has no effect if you have defined your own error handler with set_error_handler()
[Editor's Note: This is not quite accurate.
E_ERROR, E_PARSE, E_CORE_ERROR, E_CORE_WARNING, E_COMPILE_ERROR and E_COMPILE_WARNING error levels will be handled as per the error_reporting settings.
All other levels of errors will be passed to the custom error handler defined by set_error_handler().
Zeev Suraski suggests that a simple way to use the defined levels of error reporting with your custom error handlers is to add the following line to the top of your error handling function:
if (!($type & error_reporting())) return;
-zak@php.net]
qeremy ! gmail ¶
9 years ago
If you want to see all errors in your local environment, you can set your project URL like "foo.com.local" locally and put that in bootstrap file.
<?php
if (substr($_SERVER['SERVER_NAME'], -6) == '.local') {
ini_set('display_errors', 1);
ini_set('error_reporting', E_ALL);
// or error_reporting(E_ALL);
}
?>
Rash ¶
9 years ago
If you are using the PHP development server, run from the command line via `php -S servername:port`, every single error/notice/warning will be reported in the command line itself, with file name, and line number, and stack trace.
So if you want to keep a log of all the errors even after page reloads (for help in debugging, maybe), running the PHP development server can be useful.
huhiko334 at yandex dot ru ¶
6 years ago
If you get a weird mysql warnings like "Warning: mysql_query() : Your query requires a full tablescan...", don't look for error_reporting settings - it's set in php.ini.
You can turn it off with
ini_set("mysql.trace_mode","Off");
in your script
http://tinymy.link/mctct
rojaro at gmail dot com ¶
14 years ago
To enable error reporting for *ALL* error messages including every error level (including E_STRICT, E_NOTICE etc.), simply use:
<?php error_reporting(-1); ?>
kc8yds at gmail dot com ¶
16 years ago
this is to show all errors for code that may be run on different versions
for php 5 it shows E_ALL^E_STRICT and for other versions just E_ALL
if anyone sees any problems with it please correct this post
<?php
ini_set('error_reporting', version_compare(PHP_VERSION,5,'>=') && version_compare(PHP_VERSION,6,'<') ?E_ALL^E_STRICT:E_ALL);
?>
fredrik at demomusic dot nu ¶
19 years ago
Remember that the error_reporting value is an integer, not a string ie "E_ALL & ~E_NOTICE".
This is very useful to remember when setting error_reporting levels in httpd.conf:
Use the table above or:
<?php
ini_set("error_reporting", E_YOUR_ERROR_LEVEL);
echo ini_get("error_reporting");
?>
To get the appropriate integer for your error-level. Then use:
php_admin_value error_reporting YOUR_INT
in httpd.conf
I want to share this rather straightforward tip as it is rather annoying for new php users trying to understand why things are not working when the error-level is set to (int) "E_ALL" = 0...
Maybe the PHP-developers should make ie error_reporting("E_ALL"); output a E_NOTICE informative message about the mistake?
DarkGool ¶
19 years ago
In phpinfo() error reporting level display like a bit (such as 4095)
Maybe it is a simply method to understand what a level set on your host
if you are not have access to php.ini file
<?php
$bit = ini_get('error_reporting');
while ($bit > 0) {
for($i = 0, $n = 0; $i <= $bit; $i = 1 * pow(2, $n), $n++) {
$end = $i;
}
$res[] = $end;
$bit = $bit - $end;
}
?>
In $res you will have all constants of error reporting
$res[]=int(16) // E_CORE_ERROR
$res[]=int(8) // E_NOTICE
...
Daz Williams (The Northeast) ¶
15 years ago
Only display php errors to the developer...
<?php
if($_SERVER['REMOTE_ADDR']=="00.00.00.00")
{
ini_set('display_errors','On');
}
else
{
ini_set('display_errors','Off');
}
?>
Just replace 00.00.00.00 with your ip address.
teynon1 at gmail dot com ¶
12 years ago
It might be a good idea to include E_COMPILE_ERROR in error_reporting.
If you have a customer error handler that does not output warnings, you may get a white screen of death if a "require" fails.
Example:
<?php
error_reporting(E_ERROR | E_WARNING | E_PARSE);
function myErrorHandler($errno, $errstr, $errfile, $errline) {
// Do something other than output message.
return true;
}
$old_error_handler = set_error_handler("myErrorHandler");
require "this file does not exist";
?>
To prevent this, simply include E_COMPILE_ERROR in the error_reporting.
<?php
error_reporting(E_ERROR | E_WARNING | E_PARSE | E_COMPILE_ERROR);
?>
misplacedme at gmail dot com ¶
15 years ago
I always code with E_ALL set.
After a couple of pages of
<?php
$username = (isset($_POST['username']) && !empty($_POST['username']))....
?>
I made this function to make things a little bit quicker. Unset values passed by reference won't trigger a notice.
<?php
function test_ref(&$var,$test_function='',$negate=false) {
$stat = true;
if(!isset($var)) $stat = false;
if (!empty($test_function) && function_exists($test_function)){
$stat = $test_function($var);
$stat = ($negate) ? $stat^1 : $stat;
}
elseif($test_function == 'empty') {
$stat = empty($var);
$stat = ($negate) ? $stat^1 : $stat;
}
elseif (!function_exists($test_function)) {
$stat = false;
trigger_error("$test_function() is not a valid function");
}
$stat = ($stat) ? true : false;
return $stat;
}
$a = '';
$b = '15';
test_ref($a,'empty',true); //False
test_ref($a,'is_int'); //False
test_ref($a,'is_numeric'); //False
test_ref($b,'empty',true); //true
test_ref($b,'is_int'); //False
test_ref($b,'is_numeric'); //false
test_ref($unset,'is_numeric'); //false
test_ref($b,'is_number'); //returns false, with an error.
?>
Alex ¶
17 years ago
error_reporting() may give unexpected results if the @ error suppression directive is used.
<?php
@include 'config.php';
include 'foo.bar'; // non-existent file
?>
config.php
<?php
error_reporting(0);
?>
will throw an error level E_WARNING in relation to the non-existent file (depending of course on your configuration settings). If the suppressor is removed, this works as expected.
Alternatively using ini_set('display_errors', 0) in config.php will achieve the same result. This is contrary to the note above which says that the two instructions are equivalent.
