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run code in 150+ php & hhvm versions
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<?php function insert ( $var, $key ) { $dizi[$key]=$var; echo var_dump($dizi); } $dizi = array ( '1','2','3','4','5'); insert ("a",3); ?>
based on XcKte
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(1) { [3]=> string(1) "a" }