PHP 8.3.4 Released!

定義済み定数

以下の定数は、PHP コアに含まれており、常に利用可能です。

注意: 以下の定数をphp.iniで使用することができますが、 httpd.confのようなPHPの外部では、 代わりにビットマスク値を使用する必要があります。

エラーとロギング
定数 説明 注記
1 E_ERROR (int) 重大な実行時エラー。これは、メモリ確保に関する問題のように復帰で きないエラーを示します。スクリプトの実行は中断されます。
2 E_WARNING (int) 実行時の警告 (致命的なエラーではない)。スクリプトの実行は中断さ れません。  
4 E_PARSE (int) コンパイル時のパースエラー。パースエラーはパーサでのみ生成されま す。  
8 E_NOTICE (int) 実行時の警告。エラーを発しうる状況に遭遇したことを示す。 ただし通常のスクリプト実行の場合にもこの警告を発することがありうる。  
16 E_CORE_ERROR (int) PHPの初期始動時点での致命的なエラー。E_ERRORに 似ているがPHPのコアによって発行される点が違う。  
32 E_CORE_WARNING (int) (致命的ではない)警告。PHPの初期始動時に発生する。 E_WARNINGに似ているがPHPのコアによって発行される 点が違う。  
64 E_COMPILE_ERROR (int) コンパイル時の致命的なエラー。E_ERRORに 似ているがZendスクリプティングエンジンによって発行される点が違う。  
128 E_COMPILE_WARNING (int) コンパイル時の警告(致命的ではない)。E_WARNINGに 似ているがZendスクリプティングエンジンによって発行される点が違う。  
256 E_USER_ERROR (int) ユーザーによって発行されるエラーメッセージ。E_ERROR に似ているがPHPコード上でtrigger_error()関数を 使用した場合に発行される点が違う。  
512 E_USER_WARNING (int) ユーザーによって発行される警告メッセージ。E_WARNING に似ているがPHPコード上でtrigger_error()関数を 使用した場合に発行される点が違う。  
1024 E_USER_NOTICE (int) ユーザーによって発行される注意メッセージ。E_NOTICEに に似ているがPHPコード上でtrigger_error()関数を 使用した場合に発行される点が違う。  
2048 E_STRICT (int) コードの相互運用性や互換性を維持するために PHP がコードの変更を提案する。  
4096 E_RECOVERABLE_ERROR (int) キャッチできる致命的なエラー。危険なエラーが発生したが、 エンジンが不安定な状態になるほどではないことを表す。 ユーザー定義のハンドラでエラーがキャッチされなかった場合 (set_error_handler() も参照ください) は、 E_ERROR として異常終了する。  
8192 E_DEPRECATED (int) 実行時の注意。これを有効にすると、 将来のバージョンで動作しなくなるコードについての警告を受け取ることができる。  
16384 E_USER_DEPRECATED (int) ユーザー定義の警告メッセージ。これは E_DEPRECATED と同等だが、 PHP のコード上で関数 trigger_error() によって作成されるという点が異なる。  
32767 E_ALL (int) 全てのエラーと警告。  

上記の値(数値も論理値も)はどのエラーをレポートするかを指定する ビットマスクを組み立てる。ビット演算子 を使用して値を組み合わせたり特定のエラータイプをマスクすることができる。 php.ini では'|', '~', '!', '^' and '&'のみが解釈されることに 注意すべきである。

add a note

User Contributed Notes 21 notes

up
30
Andy at Azurite (co uk)
12 years ago
-1 is also semantically meaningless as a bit field, and only works in 2s-complement numeric representations. On a 1s-complement system -1 would not set E_ERROR. On a sign-magnitude system -1 would set nothing at all! (see e.g. http://en.wikipedia.org/wiki/Ones%27_complement)

If you want to set all bits, ~0 is the correct way to do it.

But setting undefined bits could result in undefined behaviour and that means *absolutely anything* could happen :-)
up
13
fadhilinjagi at gmail dot com
2 years ago
A simple and neat way to get the error level from the error code. You can even customize the error level names further.

<?php
$exceptions
= [
E_ERROR => "E_ERROR",
E_WARNING => "E_WARNING",
E_PARSE => "E_PARSE",
E_NOTICE => "E_NOTICE",
E_CORE_ERROR => "E_CORE_ERROR",
E_CORE_WARNING => "E_CORE_WARNING",
E_COMPILE_ERROR => "E_COMPILE_ERROR",
E_COMPILE_WARNING => "E_COMPILE_WARNING",
E_USER_ERROR => "E_USER_ERROR",
E_USER_WARNING => "E_USER_WARNING",
E_USER_NOTICE => "E_USER_NOTICE",
E_STRICT => "E_STRICT",
E_RECOVERABLE_ERROR => "E_RECOVERABLE_ERROR",
E_DEPRECATED => "E_DEPRECATED",
E_USER_DEPRECATED => "E_USER_DEPRECATED",
E_ALL => "E_ALL"
];

echo
$exceptions["1"];
$code = 256;
echo
$exceptions[$code];
?>

Output:
E_ERROR
E_USER_ERROR

This will need updating when PHP updates the error level names. Otherwise, it works just fine.
up
26
russthom at fivegulf dot com
11 years ago
[Editor's note: fixed E_COMPILE_* cases that incorrectly returned E_CORE_* strings. Thanks josiebgoode.]

The following code expands on Vlad's code to show all the flags that are set. if not set, a blank line shows.

<?php
$errLvl
= error_reporting();
for (
$i = 0; $i < 15; $i++ ) {
print
FriendlyErrorType($errLvl & pow(2, $i)) . "<br>\\n";
}

function
FriendlyErrorType($type)
{
switch(
$type)
{
case
E_ERROR: // 1 //
return 'E_ERROR';
case
E_WARNING: // 2 //
return 'E_WARNING';
case
E_PARSE: // 4 //
return 'E_PARSE';
case
E_NOTICE: // 8 //
return 'E_NOTICE';
case
E_CORE_ERROR: // 16 //
return 'E_CORE_ERROR';
case
E_CORE_WARNING: // 32 //
return 'E_CORE_WARNING';
case
E_COMPILE_ERROR: // 64 //
return 'E_COMPILE_ERROR';
case
E_COMPILE_WARNING: // 128 //
return 'E_COMPILE_WARNING';
case
E_USER_ERROR: // 256 //
return 'E_USER_ERROR';
case
E_USER_WARNING: // 512 //
return 'E_USER_WARNING';
case
E_USER_NOTICE: // 1024 //
return 'E_USER_NOTICE';
case
E_STRICT: // 2048 //
return 'E_STRICT';
case
E_RECOVERABLE_ERROR: // 4096 //
return 'E_RECOVERABLE_ERROR';
case
E_DEPRECATED: // 8192 //
return 'E_DEPRECATED';
case
E_USER_DEPRECATED: // 16384 //
return 'E_USER_DEPRECATED';
}
return
"";
}
?>
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12
cl at viazenetti dot de
6 years ago
An other way to get all PHP errors that are set to be reported. This code will even work, when additional error types are added in future.

<?php
$pot
= 0;
foreach (
array_reverse(str_split(decbin(error_reporting()))) as $bit) {
if (
$bit == 1) {
echo
array_search(pow(2, $pot), get_defined_constants(true)['Core']). "<br>\n";
}
$pot++;
}
?>
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14
bbrokman at gmail dot com
4 years ago
A neat way to have a place in code to control error reporting configuration :)

<?php

$errorsActive
= [
E_ERROR => FALSE,
E_WARNING => TRUE,
E_PARSE => TRUE,
E_NOTICE => TRUE,
E_CORE_ERROR => FALSE,
E_CORE_WARNING => FALSE,
E_COMPILE_ERROR => FALSE,
E_COMPILE_WARNING => FALSE,
E_USER_ERROR => TRUE,
E_USER_WARNING => TRUE,
E_USER_NOTICE => TRUE,
E_STRICT => FALSE,
E_RECOVERABLE_ERROR => TRUE,
E_DEPRECATED => FALSE,
E_USER_DEPRECATED => TRUE,
E_ALL => FALSE,
];

error_reporting(
array_sum(
array_keys($errorsActive, $search = true)
)
);

?>
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10
paulsnar
5 years ago
PHP 7 makes E_STRICT irrelevant, reclassifying most of the errors as proper warnings, notices or E_DEPRECATED: https://wiki.php.net/rfc/reclassify_e_strict
up
3
ahsankhatri1992 at gmail
7 years ago
Notes posted above limited to current errors level as on 26th Aug 2016, following snippet will work even on introduction of new error level

$errLvl = error_reporting();
for ( $i = 1; $i < E_ALL; $i*=2 )
{
print FriendlyErrorType($errLvl & $i) . "<br>\n";
}

function FriendlyErrorType($type)
{
switch($type)
{
case E_ERROR: // 1 //
return 'E_ERROR';
case E_WARNING: // 2 //
return 'E_WARNING';
case E_PARSE: // 4 //
return 'E_PARSE';
case E_NOTICE: // 8 //
return 'E_NOTICE';
case E_CORE_ERROR: // 16 //
return 'E_CORE_ERROR';
case E_CORE_WARNING: // 32 //
return 'E_CORE_WARNING';
case E_COMPILE_ERROR: // 64 //
return 'E_COMPILE_ERROR';
case E_COMPILE_WARNING: // 128 //
return 'E_COMPILE_WARNING';
case E_USER_ERROR: // 256 //
return 'E_USER_ERROR';
case E_USER_WARNING: // 512 //
return 'E_USER_WARNING';
case E_USER_NOTICE: // 1024 //
return 'E_USER_NOTICE';
case E_STRICT: // 2048 //
return 'E_STRICT';
case E_RECOVERABLE_ERROR: // 4096 //
return 'E_RECOVERABLE_ERROR';
case E_DEPRECATED: // 8192 //
return 'E_DEPRECATED';
case E_USER_DEPRECATED: // 16384 //
return 'E_USER_DEPRECATED';
}
return "";
}
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3
kezzyhko at NOSPAM dot semysha dot ru
7 years ago
As for me, the best way to get error name by int value is that. And it's works fine for me ;)
<?php

array_flip
(array_slice(get_defined_constants(true)['Core'], 1, 15, true))[$type];

//the same in readable form
array_flip(
array_slice(
get_defined_constants(true)['Core'],
1,
15,
true
)
)[
$type]

?>
up
1
kaioker
2 years ago
super simple error code to human readable conversion:

function prettycode($code){
return $code == 0 ? "FATAL" : array_search($code, get_defined_constants(true)['Core']);
}
up
1
ali6236 at yahoo dot com
10 months ago
A better way to map error constant to their names (instead of switch) :

function getErrorName($code)
{
static $error_names = [
E_ERROR => 'E_ERROR',
E_WARNING => 'E_WARNING',
E_PARSE => 'E_PARSE',
E_NOTICE => 'E_NOTICE',
E_CORE_ERROR => 'E_CORE_ERROR',
E_CORE_WARNING => 'E_CORE_WARNING',
E_COMPILE_ERROR => 'E_COMPILE_ERROR',
E_COMPILE_WARNING => 'E_COMPILE_WARNING',
E_USER_ERROR => 'E_USER_ERROR',
E_USER_WARNING => 'E_USER_WARNING',
E_USER_NOTICE => 'E_USER_NOTICE',
E_STRICT => 'E_STRICT',
E_RECOVERABLE_ERROR => 'E_RECOVERABLE_ERROR',
E_DEPRECATED => 'E_DEPRECATED',
E_USER_DEPRECATED => 'E_USER_DEPRECATED',
];
return $error_names[$code] ?? '';
}
up
0
ErikBachmann
4 years ago
A shorter version of vladvarna's FriendlyErrorType($type)
<?php
function getErrorTypeByValue($type) {
$constants = get_defined_constants(true);

foreach (
$constants['Core'] as $key => $value ) { // Each Core constant
if ( preg_match('/^E_/', $key ) ) { // Check error constants
if ( $type == $value )
return(
"$key=$value");
}
}
}
// getErrorTypeByValue()

echo "[".getErrorTypeByValue( 1 ) . "]". PHP_EOL;
echo
"[".getErrorTypeByValue( 0 ) . "]". PHP_EOL;
echo
"[".getErrorTypeByValue( 8 ) . "]". PHP_EOL;
?>

Will give
[E_ERROR=1]
[]
[E_NOTICE=8]
up
0
Anonymous
7 years ago
My version!
For long list function returns for example "E_ALL without E_DEPRECATED "

function errorLevel()
{
$levels = array(
'E_ERROR',
'E_WARNING',
'E_PARSE',
'E_NOTICE',
'E_CORE_ERROR',
'E_CORE_WARNING',
'E_COMPILE_ERROR',
'E_COMPILE_WARNING',
'E_USER_ERROR',
'E_USER_WARNING',
'E_USER_NOTICE',
'E_STRICT',
'E_RECOVERABLE_ERROR',
'E_DEPRECATED',
'E_USER_DEPRECATED',
'E_ALL'
);
$excluded = $included = array();
$errLvl = error_reporting();
foreach ($levels as $lvl) {
$val = constant($lvl);
if ($errLvl & $val) {
$included []= $lvl;
} else {
$excluded []= $lvl;
}
}
if (count($excluded) > count($included)) {
echo '<br />Consist: '.implode(',', $included);
} else {
echo '<br />Consist: E_ALL without '.implode(',', $excluded);
}
}
up
-2
PhpMyCoder
13 years ago
Well, technically -1 will show all errors which includes any new ones included by PHP. My guess is that E_ALL will always include new error constants so I usually prefer:

<?php
error_reporting
(E_ALL | E_STRICT);
?>

Reason being: With a quick glance anyone can tell you what errors are reported. -1 might be a bit more cryptic to newer programmers.
up
-3
vladvarna at gmail dot com
12 years ago
function FriendlyErrorType($type)
{
switch($type)
{
case E_ERROR: // 1 //
return 'E_ERROR';
case E_WARNING: // 2 //
return 'E_WARNING';
case E_PARSE: // 4 //
return 'E_PARSE';
case E_NOTICE: // 8 //
return 'E_NOTICE';
case E_CORE_ERROR: // 16 //
return 'E_CORE_ERROR';
case E_CORE_WARNING: // 32 //
return 'E_CORE_WARNING';
case E_CORE_ERROR: // 64 //
return 'E_COMPILE_ERROR';
case E_CORE_WARNING: // 128 //
return 'E_COMPILE_WARNING';
case E_USER_ERROR: // 256 //
return 'E_USER_ERROR';
case E_USER_WARNING: // 512 //
return 'E_USER_WARNING';
case E_USER_NOTICE: // 1024 //
return 'E_USER_NOTICE';
case E_STRICT: // 2048 //
return 'E_STRICT';
case E_RECOVERABLE_ERROR: // 4096 //
return 'E_RECOVERABLE_ERROR';
case E_DEPRECATED: // 8192 //
return 'E_DEPRECATED';
case E_USER_DEPRECATED: // 16384 //
return 'E_USER_DEPRECATED';
}
return $type;
}
up
-5
Anonymous
11 years ago
this would give you all the reported exception list of your configuration.

<?php
function FriendlyErrorType($type)
{
$return ="";
if(
$type & E_ERROR) // 1 //
$return.='& E_ERROR ';
if(
$type & E_WARNING) // 2 //
$return.='& E_WARNING ';
if(
$type & E_PARSE) // 4 //
$return.='& E_PARSE ';
if(
$type & E_NOTICE) // 8 //
$return.='& E_NOTICE ';
if(
$type & E_CORE_ERROR) // 16 //
$return.='& E_CORE_ERROR ';
if(
$type & E_CORE_WARNING) // 32 //
$return.='& E_CORE_WARNING ';
if(
$type & E_COMPILE_ERROR) // 64 //
$return.='& E_COMPILE_ERROR ';
if(
$type & E_COMPILE_WARNING) // 128 //
$return.='& E_COMPILE_WARNING ';
if(
$type & E_USER_ERROR) // 256 //
$return.='& E_USER_ERROR ';
if(
$type & E_USER_WARNING) // 512 //
$return.='& E_USER_WARNING ';
if(
$type & E_USER_NOTICE) // 1024 //
$return.='& E_USER_NOTICE ';
if(
$type & E_STRICT) // 2048 //
$return.='& E_STRICT ';
if(
$type & E_RECOVERABLE_ERROR) // 4096 //
$return.='& E_RECOVERABLE_ERROR ';
if(
$type & E_DEPRECATED) // 8192 //
$return.='& E_DEPRECATED ';
if(
$type & E_USER_DEPRECATED) // 16384 //
$return.='& E_USER_DEPRECATED ';
return
substr($return,2);
}
echo
"error_reporting = " . FriendlyErrorType(ini_get('error_reporting')) .";<br>";
?>
up
-5
damian at thebestisp dot dot dot com
8 years ago
I saw that Chris seems to think that errors might be combined in some cases, I don't know of any cases, but his code is overly verbose, inefficient, and doesn't take into account future E_ constants. Here's my version of handling multiple errors (which probably wont ever happen) using my other code as a base. The only real difference is that this doesn't bother to split out undefined bits, which is pretty much useless and would get rather messy if you have more than a few bits set above 2**14 (0 to 14 have an associated error).

<?php
function friendly_error_type($type) {
static
$levels=null;
if (
$levels===null) {
$levels=[];
foreach (
get_defined_constants() as $key=>$value) {
if (
strpos($key,'E_')!==0) {continue;}
$levels[$value]=substr($key,2);
}
}
$out=[];
foreach (
$levels as $int=>$string) {
if (
$int&$type) {$out[]=$string;}
$type&=~$int;
}
if (
$type) {$out[]="Error Remainder [{$type}]";}
return
implode(' & ',$out);
}
echo
friendly_error_type(E_ERROR|E_USER_DEPRECATED); //ERROR & USER_DEPRECATED
echo friendly_error_type(2**20-1); //ERROR & RECOVERABLE_ERROR & WARNING & PARSE & NOTICE & STRICT & DEPRECATED & CORE_ERROR & CORE_WARNING & COMPILE_ERROR & COMPILE_WARNING & USER_ERROR & USER_WARNING & USER_NOTICE & USER_DEPRECATED & Error Remainder [1015808]
?>
up
-7
Herbert
7 years ago
if you want to bring this list back to the categories error/warning/notice/all

<?php

$error_level
= 'warning'; // Allowed values: error/warning/notice/all

$error_error = (int) E_ERROR | E_USER_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_RECOVERABLE_ERROR | E_PARSE;
$error_warning = (int) $error_error | E_WARNING | E_USER_WARNING | E_CORE_WARNING | E_COMPILE_WARNING;
$error_notice = (int) $error_warning | E_NOTICE | E_USER_NOTICE | E_DEPRECATED | E_USER_DEPRECATED;
$error_all = (int) $error_notice | E_STRICT;

error_reporting ($GLOBALS["error_$error_level"]);

?>
up
-5
damian at thebestisp dot dot dot com
8 years ago
I use this code to help mimic the default error handler, the only difference is that the levels end up being all caps, which I don't care to fix. You could also get rid of the underscores, but again, I don't care :P
Until php starts adding constants starting with E_ that have values overlapping with other E_ constants, this seems to be the shortest way of converting error code integers to strings understandable by meat bags. It will also work with new types, so that's nice.
<?php
function friendly_error_type($type) {
static
$levels=null;
if (
$levels===null) {
$levels=[];
foreach (
get_defined_constants() as $key=>$value) {
if (
strpos($key,'E_')!==0) {continue;}
$levels[$value]=substr($key,2);
}
}
return (isset(
$levels[$type]) ? $levels[$type] : "Error #{$type}");
}
echo
friendly_error_type(1); #ERROR
echo friendly_error_type(2); #WARNING
echo friendly_error_type(3); #Error #3
?>
Tested on 5.6.12 and 7.0.3 (The first was by accident, didn't realize I was sshed into production :3)
up
-4
ilpaijin at gmail dot com
6 years ago
The bitmask values relative to the Constant E_ALL is 30719, in case of PHP 5.6.x
up
-6
espertalhao04 at hotmail dot com
6 years ago
A simplified way of writting a function to return a (non-optimal) representation of the error code as a bitwise string:

<?php
function readable_error_type($error_code)
{
$constants = array();
foreach(
get_defined_constants() as $key => $value)
{
if(
strpos($key, 'E_') === 0 && ($value <= $error_code) && ($value & $error_code))
{
$constants[] = $key;
}
}

return
implode(' | ', $constants);
}
?>

This only works for values above 0.
up
-18
chris-php at IGNORETHISPART dot cybermato dot com
9 years ago
How about this? Unlike the examples below, it will show all the bits that are set, AND handle any bits defined in the future (at least not silently hide them)...

$strErrorType = "";
$bit = 1;
$tmpErrNo = $errNo;
while ($tmpErrNo) {
if ($tmpErrNo & $bit) {
if ($strErrorType != "")
$strErrorType .= " | ";
switch ($bit) {
case E_USER_WARNING:
$strErrorType .= "E_USER_WARNING"; break;
case E_USER_NOTICE:
$strErrorType .= "E_USER_NOTICE"; break;
case E_WARNING:
$strErrorType .= "E_WARNING"; break;
case E_CORE_WARNING:
$strErrorType .= "E_CORE_WARNING"; break;
case E_COMPILE_WARNING:
$strErrorType .= "E_COMPILE_WARNING"; break;
case E_NOTICE:
$strErrorType .= "E_NOTICE"; break;
case E_ERROR:
$strErrorType .= "E_ERROR"; break;
case E_PARSE:
$strErrorType .= "E_PARSE"; break;
case E_CORE_ERROR:
$strErrorType .= "E_CORE_ERROR"; break;
case E_COMPILE_ERROR:
$strErrorType .= "E_COMPILE_ERROR"; break;
case E_USER_ERROR:
$strErrorType .= "E_USER_ERROR"; break;
default:
$strErrorType .= "(unknown error bit $bit)"; break;
}
}
$tmpErrNo &= ~$bit;
$bit <<= 1;
}
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