3v4l.org

run code in 300+ PHP versions simultaneously
<?php function fun($f) { return $f; } echo "Create pointer\n"; $f = fun('foo'); echo "Call pointer\n"; $f(); echo "Done\n";
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.16, 8.3.0 - 8.3.3
Create pointer Call pointer Fatal error: Uncaught Error: Call to undefined function foo() in /in/oflv5:8 Stack trace: #0 {main} thrown in /in/oflv5 on line 8
Process exited with code 255.

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