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run code in 300+ PHP versions simultaneously
<?php $f = array('one' => 1); list($one) = $f; echo (int)isset($f);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined array key 0 in /in/XePRo on line 3 1
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined offset: 0 in /in/XePRo on line 3 1
Output for 7.3.32 - 7.3.33, 7.4.26
1
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Undefined offset: 0 in /in/XePRo on line 3 1

preferences:
220.11 ms | 402 KiB | 324 Q