Bug #81454 [Com]: error_reporting() and ini_get('error_reporting') can get out of sync using @

Edit report at https://bugs.php.net/bug.php?id=81454&edit=1 ID: 81454 Comment by: antonino dot spampinato86 at gmail dot com Reported by: daimona dot wiki at gmail dot com Summary: error_reporting() and ini_get('error_reporting') can get out of sync using @ Status: Open Type: Bug Package: Scripting Engine problem Operating System: Any PHP Version: Irrelevant Block user comment: N Private report: N New Comment: <?php # different results for PHP 5.x and 8.x: //-1 only works in 2s-complement numeric representations, ~0 in 1s-complement numeric representations //ini_set('error_reporting', 2); $a = array(); $a['ini_get'] = @ini_get('error_reporting'); if(is_string($a['ini_get'])) //return ini_get empty string for false or null, if undefined is default "null" prior 5.3 it's return bool false #42657 $a['ini_get'] = ini_get('error_reporting'); $a['error_reporting'] = @error_reporting(); if(is_int($a['error_reporting'])) $a['error_reporting'] = error_reporting(); $a['bug'] = @error_reporting(); $b = false; //function not work? $c = null; //function disabled? var_dump($a, @$b, @$c); Expected result: array(3) { ["ini_get"]=> string(2) "-1" ["error_reporting"]=> int(-1) ["bug"]=> int(-1) } bool(false) NULL php >= 8: array(3) { ["ini_get"]=> string(2) "-1" ["error_reporting"]=> int(-1) ["bug"]=> int(4437) } bool(false) NULL php < 8: array(3) { ["ini_get"]=> string(2) "-1" ["error_reporting"]=> int(-1) ["bug"]=> int(0) } bool(false) NULL Previous Comments: ------------------------------------------------------------------------ [2021-09-19 15:51:29] antonino dot spampinato86 at gmail dot com For php >= 8 https://www.php.net/manual/en/migration80.incompatible.php ------------------------------------------------------------------------ [2021-09-19 15:48:38] antonino dot spampinato86 at gmail dot com The @ operator will no longer silence fatal errors (E_ERROR, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR, E_RECOVERABLE_ERROR, E_PARSE). Error handlers that expect error_reporting to be 0 when @ is used, should be adjusted to use a mask check instead: For consistency even the value 0, as it previously indicated error suppression. The php constants of the errors is a numerical sequence, a mask means from the single or the union of them. ------------------------------------------------------------------------ [2021-09-17 19:37:54] daimona dot wiki at gmail dot com Description: ------------ This bug is a direct consequence of bug #75924. That one essentially states that, starting with PHP 7, the @ operator affects the output of error_reporting(), but not that of ini_get('error_reporting'). Now, consider the following test case: https://3v4l.org/70QJY For the PHP 7 examples, I'd expect error_reporting() and ini_get() to return the same value (-1) in "POST", but this is not the case. AIUI, it happens because: - error_reporting() and ini_get() are out of sync when testFunc() starts, per bug #75924 - error_reporting(0) syncs them again, as expected - Same for error_reporting($orig) - But then, when the silenced statement ends, only error_reporting() is restored (because only error_reporting() was changed by @, I guess) This bug affects all versions of PHP starting from 7.0. PHP 8 is also affected, even though some numeric values are different. Test script: --------------- function testFunc() { print "INSIDE 1 er=" . error_reporting() . ' ini=' . intval( ini_get( 'error_reporting' ) ) . "\n"; $orig = error_reporting( 0 ); print "INSIDE 2 er=" . error_reporting() . ' ini=' . intval( ini_get( 'error_reporting' ) ) . "\n"; error_reporting( $orig ); print "INSIDE 3 er=" . error_reporting() . ' ini=' . intval( ini_get( 'error_reporting' ) ) . "\n"; } print "PRE er=" . error_reporting() . ' ini=' . intval( ini_get( 'error_reporting' ) ) . "\n"; @testFunc(); print "POST er=" . error_reporting() . ' ini=' . intval( ini_get( 'error_reporting' ) ) . "\n"; Expected result: ---------------- PRE er=-1 ini=-1 INSIDE 1 er=0 ini=0 INSIDE 2 er=0 ini=0 INSIDE 3 er=0 ini=0 POST er=-1 ini=-1 Actual result: -------------- PRE er=-1 ini=-1 INSIDE 1 er=0 ini=-1 INSIDE 2 er=0 ini=0 INSIDE 3 er=0 ini=0 POST er=-1 ini=0 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81454&edit=1