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run code in 300+ PHP versions simultaneously
<?php $a = array('a', 'b', 'c'); foreach($a as $k=>$v){ if($k==1) unset($a[$k]); echo $k.' => '.$v.' ('.$a[$k].')'.PHP_EOL; } print_r($a);
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
0 => a (a) Warning: Undefined array key 1 in /in/cvLr0 on line 9 1 => b () 2 => c (c) Array ( [0] => a [2] => c )
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 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
0 => a (a) Notice: Undefined offset: 1 in /in/cvLr0 on line 9 1 => b () 2 => c (c) Array ( [0] => a [2] => c )
Output for 7.3.32 - 7.3.33, 7.4.26
0 => a (a) 1 => b () 2 => c (c) Array ( [0] => a [2] => c )
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9, 5.0.2 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
0 => a (a) Notice: Undefined offset: 1 in /in/cvLr0 on line 9 1 => b () 2 => c (c) Array ( [0] => a [2] => c )
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/cvLr0 on line 9 0 => a (a)PHP_EOL Notice: Undefined offset: 1 in /in/cvLr0 on line 9 Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/cvLr0 on line 9 1 => b ()PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/cvLr0 on line 9 2 => c (c)PHP_EOLArray ( [0] => a [2] => c )

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229.21 ms | 402 KiB | 330 Q