Bug #75389 [NEW]: function 'isset' not found when using array_filter

From: g dot sokol99 at g-sokol dot info Operating system: Linux PHP version: 7.1.10 Package: *General Issues Bug Type: Bug Bug description:function 'isset' not found when using array_filter Description: ------------ array_filter($some_array, 'isset') cause PHP WARNING. Test script: --------------- <?php $foo = array('a' => 1, 'b' => null); var_export(array_filter($foo, 'isset'); Expected result: ---------------- array ( 'a' => 1, ) Actual result: -------------- PHP Warning: array_filter() expects parameter 2 to be a valid callback, function 'isset' not found or invalid function name in php shell code on line 1 PHP Stack trace: PHP 1. {main}() php shell code:0 PHP 2. array_filter() php shell code:1 NULL -- Edit bug report at https://bugs.php.net/bug.php?id=75389&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75389&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75389&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75389&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75389&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75389&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75389&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75389&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75389&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75389&r=support Expected behavior: https://bugs.php.net/fix.php?id=75389&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75389&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75389&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75389&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75389&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75389&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75389&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75389&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75389&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75389&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75389&r=mysqlcfg