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<?php $arr=[]; function addToArray($arr,$val) { array_push($arr,["order_id"=>$val]); return $arr; } $arr=addToArray($arr,"1234"); $arr=addToArray($arr,"1234"); print_r($arr); echo str($arr); ?>
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [order_id] => 1234 ) [1] => Array ( [order_id] => 1234 ) ) Fatal error: Uncaught Error: Call to undefined function str() in /in/m28qQ:13 Stack trace: #0 {main} thrown in /in/m28qQ on line 13
Process exited with code 255.

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