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<?php function func(&$a){ $a[0]=10; } $a=array(1, 2, 3, 4); print_r($a); func($a); print_r($a);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) Array ( [0] => 10 [1] => 2 [2] => 3 [3] => 4 )