3v4l.org

run code in 300+ PHP versions simultaneously
<?php $row = ['Rick', 'Lewi', 'Ferdi', 'Stefan']; $mapping = ['Team1', 'Team2', 'Team3']; $mappingCount = count($mappingCount); $row = array_merge(array_fill(0, $mappingCount, null), $row); var_dump($row);
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined variable $mappingCount in /in/f99r1 on line 4 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /in/f99r1:4 Stack trace: #0 {main} thrown in /in/f99r1 on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Warning: Undefined variable $mappingCount in /in/f99r1 on line 4 Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, null given in /in/f99r1:4 Stack trace: #0 {main} thrown in /in/f99r1 on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: mappingCount in /in/f99r1 on line 4 Warning: count(): Parameter must be an array or an object that implements Countable in /in/f99r1 on line 4 array(4) { [0]=> string(4) "Rick" [1]=> string(4) "Lewi" [2]=> string(5) "Ferdi" [3]=> string(6) "Stefan" }
Output for 7.3.32 - 7.3.33
Warning: count(): Parameter must be an array or an object that implements Countable in /in/f99r1 on line 4 array(4) { [0]=> string(4) "Rick" [1]=> string(4) "Lewi" [2]=> string(5) "Ferdi" [3]=> string(6) "Stefan" }
Output for 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Undefined variable: mappingCount in /in/f99r1 on line 4 array(4) { [0]=> string(4) "Rick" [1]=> string(4) "Lewi" [2]=> string(5) "Ferdi" [3]=> string(6) "Stefan" }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Notice: Undefined variable: mappingCount in /in/f99r1 on line 4 Warning: array_fill(): Number of elements must be positive in /in/f99r1 on line 5 Warning: array_merge(): Argument #1 is not an array in /in/f99r1 on line 5 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/f99r1 on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/f99r1 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/f99r1 on line 2
Process exited with code 255.

preferences:
258.99 ms | 401 KiB | 384 Q