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run code in 200+ php & hhvm versions
Bugs & Features
<?php function max_by($collection, $property) { $maxElement = $collection[0]; for ($i=0; $i < sizeof($collection); $i++) { if ($collection[$i]->$property > $maxElement->$property) { $maxElement = $collection[$i]; } } return $maxElement; } class A { function __construct($u,$v) { $this->u = $u; $this->v = $v; } } $array = [ new A(1,5), new A(2,2), new A(3,1) ]; $a = max_by($array, 'u'); $b = max_by($array, 'v'); var_dump($a, $b);
based on u26tp
Output for 5.4.0 - 7.2.0
object(A)#3 (2) { ["u"]=> int(3) ["v"]=> int(1) } object(A)#1 (2) { ["u"]=> int(1) ["v"]=> int(5) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/ei64b on line 20
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/ei64b on line 20
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/ei64b on line 20
Process exited with code 255.