3v4l.org

run code in 300+ PHP versions simultaneously
<?php $labels = array("Element1","Element2","Element3","Element4","Element5","Element6"); $i = 1; $str = ''; foreach($labels AS $label) { $str += "$label, "; if ($i % 2 == 0) { $str += "\n"; } $i++; } //Remove last 2 chars $str = substr($str,0,-2); echo $str; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: Unsupported operand types: string + string in /in/2jC2t:8 Stack trace: #0 {main} thrown in /in/2jC2t on line 8
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: A non-numeric value encountered in /in/2jC2t on line 8 Warning: A non-numeric value encountered in /in/2jC2t on line 8 Warning: A non-numeric value encountered in /in/2jC2t on line 8 Warning: A non-numeric value encountered in /in/2jC2t on line 11 Warning: A non-numeric value encountered in /in/2jC2t on line 8 Warning: A non-numeric value encountered in /in/2jC2t on line 8 Warning: A non-numeric value encountered in /in/2jC2t on line 11 Warning: A non-numeric value encountered in /in/2jC2t on line 8 Warning: A non-numeric value encountered in /in/2jC2t on line 8 Warning: A non-numeric value encountered in /in/2jC2t on line 11
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, 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
preferences:
220.72 ms | 404 KiB | 330 Q