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<?php $test = array(); $test[0] = ""; array_push($test[0],"a"); echo $test[0]; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: array_push(): Argument #1 ($array) must be of type array, string given in /in/cTHcY:4 Stack trace: #0 /in/cTHcY(4): array_push('', 'a') #1 {main} thrown in /in/cTHcY on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_push() expects parameter 1 to be array, string given in /in/cTHcY on line 4
Output for 5.2.3 - 5.2.17
Warning: array_push(): First argument should be an array in /in/cTHcY on line 4
Output for 4.4.3 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Warning</b>: array_push() [<a href='function.array-push'>function.array-push</a>]: First argument should be an array in <b>/in/cTHcY</b> on line <b>4</b><br />
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.2
<br /> <b>Warning</b>: array_push(): First argument should be an array in <b>/in/cTHcY</b> on line <b>4</b><br />
Output for 4.3.0 - 4.3.1
<br /> <b>Warning</b>: array_push() [<a href='http://www.php.net/function.array-push'>function.array-push</a>]: First argument should be an array in <b>/in/cTHcY</b> on line <b>4</b><br />

preferences:
281.05 ms | 401 KiB | 457 Q