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<?php $productos = array( array("id" => 10, "name"=>"bread"), array("id" => 12, "name"=>"Jam"), array("id" => 10, "name"=>"bread"), array("id" => 105, "name"=>"lobster") ); $cuenta = array(); foreach($productos as $producto){ $cuenta[$producto['id']]++; }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key 10 in /in/Arfv0 on line 11 Warning: Undefined array key 12 in /in/Arfv0 on line 11 Warning: Undefined array key 105 in /in/Arfv0 on line 11

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