3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1[0] = array('foo'=>'bar'); $arr2[0] = array('foo'=>'notbar'); $result = array_merge($array1, $array2); print_r($result);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined variable $array1 in /in/YnPlN on line 4 Warning: Undefined variable $array2 in /in/YnPlN on line 4 Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, null given in /in/YnPlN:4 Stack trace: #0 /in/YnPlN(4): array_merge(NULL, NULL) #1 {main} thrown in /in/YnPlN on line 4
Process exited with code 255.
Output for 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: array1 in /in/YnPlN on line 4 Notice: Undefined variable: array2 in /in/YnPlN on line 4 Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/YnPlN on line 4
Output for 7.3.32 - 7.3.33
Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/YnPlN on line 4
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 - 7.1.10, 7.2.0 - 7.2.33
Notice: Undefined variable: array1 in /in/YnPlN on line 4 Notice: Undefined variable: array2 in /in/YnPlN on line 4 Warning: array_merge(): Argument #1 is not an array in /in/YnPlN on line 4
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Undefined variable: array1 in /in/YnPlN on line 4 Notice: Undefined variable: array2 in /in/YnPlN on line 4 Warning: array_merge(): Argument #1 is not an array in /in/YnPlN on line 4 Warning: array_merge(): Argument #2 is not an array in /in/YnPlN on line 4
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: array1 in /in/YnPlN on line 4 Notice: Undefined variable: array2 in /in/YnPlN on line 4 Warning: array_merge(): Argument #1 is not an array in /in/YnPlN on line 4 Warning: array_merge(): Argument #2 is not an array in /in/YnPlN on line 4
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
Notice: Undefined variable: array1 in /in/YnPlN on line 4 Notice: Undefined variable: array2 in /in/YnPlN on line 4 Array ( )

preferences:
176.35 ms | 402 KiB | 309 Q