3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = 'php5'; $php5['bar']['baz'] = 'Jason'; var_dump($$foo['bar']['baz']); //php5 = $($foo['bar']['baz']) = $Jason = Young; echo "\n----------------php7 down------------------\n"; $bar = 'php7'; $php7['bar']['baz'] = 'Young'; var_dump($$bar['bar']['baz']);
Output for 7.0.0 - 7.0.32, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(5) "Jason" ----------------php7 down------------------ string(5) "Young"
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Warning: Illegal string offset 'bar' in /in/gKdbB on line 4 Warning: Illegal string offset 'baz' in /in/gKdbB on line 4 Notice: Undefined variable: p in /in/gKdbB on line 4 NULL ----------------php7 down------------------ Warning: Illegal string offset 'bar' in /in/gKdbB on line 12 Warning: Illegal string offset 'baz' in /in/gKdbB on line 12 Notice: Undefined variable: p in /in/gKdbB on line 12 NULL
preferences:
229.57 ms | 402 KiB | 319 Q