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<?php function reduce($a, $b) { return $b+$a; } $array = array(1,2,3,4,5,6,7,8,9,0); array_reduce($array, array('', 'reduce'));
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_reduce(): Argument #2 ($callback) must be a valid callback, class "" not found in /in/LcVdJ:7 Stack trace: #0 /in/LcVdJ(7): array_reduce(Array, Array) #1 {main} thrown in /in/LcVdJ on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_reduce() expects parameter 2 to be a valid callback, class '' not found in /in/LcVdJ on line 7
Output for 5.2.3 - 5.2.17
Warning: array_reduce(): The second argument, '::reduce', should be a valid callback in /in/LcVdJ on line 7
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_reduce() [<a href='function.array-reduce'>function.array-reduce</a>]: The second argument, '::reduce', should be a valid callback in <b>/in/LcVdJ</b> on line <b>7</b><br />
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.2
<br /> <b>Warning</b>: array_reduce(): The second argument, '::reduce', should be a valid callback in <b>/in/LcVdJ</b> on line <b>7</b><br />
Output for 4.3.0 - 4.3.1
<br /> <b>Warning</b>: array_reduce() [<a href='http://www.php.net/function.array-reduce'>function.array-reduce</a>]: The second argument, '::reduce', should be a valid callback in <b>/in/LcVdJ</b> on line <b>7</b><br />

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