3v4l.org

run code in 300+ PHP versions simultaneously
<?php $master_array = array(1, 2, 3, 4, 5, 6); $n = 2; // This is the number of columns / arrays $pattern_array = array(); $meta_array = array(); for ($i=1, $z=2*$n; $i <= $n; ++$i) { $pattern_array[$i] = $i; $pattern_array[$z-i] = $i; $meta_array[] = array(); } foreach ($master_array as $i => $element) { $pattern_index = $i % $z; $meta_index = $pattern_array[$pattern_index] - 1; $meta_array[$meta_index][] = $element; } print_r($meta_array);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Undefined constant "i" in /in/0L7N3:10 Stack trace: #0 {main} thrown in /in/0L7N3 on line 10
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Warning: Use of undefined constant i - assumed 'i' (this will throw an Error in a future version of PHP) in /in/0L7N3 on line 10 Warning: A non-numeric value encountered in /in/0L7N3 on line 10 Warning: Use of undefined constant i - assumed 'i' (this will throw an Error in a future version of PHP) in /in/0L7N3 on line 10 Warning: A non-numeric value encountered in /in/0L7N3 on line 10 Notice: Undefined offset: 0 in /in/0L7N3 on line 17 Notice: Undefined offset: 3 in /in/0L7N3 on line 17 Notice: Undefined offset: 0 in /in/0L7N3 on line 17 Array ( [0] => Array ( [0] => 2 [1] => 6 ) [1] => Array ( [0] => 3 ) [-1] => Array ( [0] => 1 [1] => 4 [2] => 5 ) )
Output for 7.3.32 - 7.3.33, 7.4.26
Warning: Use of undefined constant i - assumed 'i' (this will throw an Error in a future version of PHP) in /in/0L7N3 on line 10 Warning: A non-numeric value encountered in /in/0L7N3 on line 10 Warning: Use of undefined constant i - assumed 'i' (this will throw an Error in a future version of PHP) in /in/0L7N3 on line 10 Warning: A non-numeric value encountered in /in/0L7N3 on line 10 Array ( [0] => Array ( [0] => 2 [1] => 6 ) [1] => Array ( [0] => 3 ) [-1] => Array ( [0] => 1 [1] => 4 [2] => 5 ) )
Output for 7.1.0 - 7.1.20
Notice: Use of undefined constant i - assumed 'i' in /in/0L7N3 on line 10 Warning: A non-numeric value encountered in /in/0L7N3 on line 10 Notice: Use of undefined constant i - assumed 'i' in /in/0L7N3 on line 10 Warning: A non-numeric value encountered in /in/0L7N3 on line 10 Notice: Undefined offset: 0 in /in/0L7N3 on line 17 Notice: Undefined offset: 3 in /in/0L7N3 on line 17 Notice: Undefined offset: 0 in /in/0L7N3 on line 17 Array ( [0] => Array ( [0] => 2 [1] => 6 ) [1] => Array ( [0] => 3 ) [-1] => Array ( [0] => 1 [1] => 4 [2] => 5 ) )
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20
Notice: Use of undefined constant i - assumed 'i' in /in/0L7N3 on line 10 Notice: Use of undefined constant i - assumed 'i' in /in/0L7N3 on line 10 Notice: Undefined offset: 0 in /in/0L7N3 on line 17 Notice: Undefined offset: 3 in /in/0L7N3 on line 17 Notice: Undefined offset: 0 in /in/0L7N3 on line 17 Array ( [0] => Array ( [0] => 2 [1] => 6 ) [1] => Array ( [0] => 3 ) [-1] => Array ( [0] => 1 [1] => 4 [2] => 5 ) )
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: Use of undefined constant i - assumed 'i' in /in/0L7N3 on line 10 Notice: Use of undefined constant i - assumed 'i' in /in/0L7N3 on line 10 Notice: Undefined offset: 0 in /in/0L7N3 on line 17 Notice: Undefined offset: 3 in /in/0L7N3 on line 17 Notice: Undefined offset: 0 in /in/0L7N3 on line 17 Array ( [0] => Array ( [0] => 2 [1] => 6 ) [1] => Array ( [0] => 3 ) [-1] => Array ( [0] => 1 [1] => 4 [2] => 5 ) )
preferences:
216.76 ms | 403 KiB | 348 Q