3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types = 1); echo $a?->foo; echo $a?->foo ?? ''; echo isset($a?->foo); echo $a->foo; echo $a->foo ?? ''; echo isset($a->foo);
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Warning: Undefined variable $a in /in/bgVKX on line 3 Warning: Undefined variable $a in /in/bgVKX on line 7 Warning: Attempt to read property "foo" on null in /in/bgVKX on line 7
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33
Warning: Undefined variable $a in /in/bgVKX on line 3 Warning: Undefined variable $a in /in/bgVKX on line 4 Warning: Undefined variable $a in /in/bgVKX on line 7 Warning: Attempt to read property "foo" on null in /in/bgVKX on line 7
Output for 7.4.0 - 7.4.33
Parse error: syntax error, unexpected '->' (T_OBJECT_OPERATOR) in /in/bgVKX on line 3
Process exited with code 255.
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