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run code in 500+ PHP versions simultaneously
<?php $test = ''; var_dump($test[0], isset($test[0]), $test === '');
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Warning: Uninitialized string offset 0 in /in/hqebU on line 3 string(0) "" bool(false) bool(true)
preferences:
67.55 ms | 1136 KiB | 4 Q