Bug #75157 [NEW]: function_exists() doesn't recognize imported functions

From: cmb Operating system: * PHP version: 7.0.23 Package: Scripting Engine problem Bug Type: Bug Bug description:function_exists() doesn't recognize imported functions Description: ------------ If a namespaced function is imported into the global scope it is apparently not recognized by function_exists(). Test script: --------------- <?php namespace Foo { function bar() { echo 'I am there!'; } } namespace { use function Foo\bar; var_dump(function_exists('bar')); bar(); } Expected result: ---------------- bool(true) I am there! Actual result: -------------- bool(false) I am there! -- Edit bug report at https://bugs.php.net/bug.php?id=75157&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75157&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75157&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75157&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75157&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75157&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75157&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75157&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75157&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75157&r=support Expected behavior: https://bugs.php.net/fix.php?id=75157&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75157&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75157&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75157&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75157&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75157&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75157&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75157&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75157&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75157&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75157&r=mysqlcfg