What will be the output of the following PHP code?< ?php $op2 = "blabla"; function foo($op1) { echo $op1; echo $op2; } foo("hello");?>

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Q: What will be the output of the following PHP code?

< ?php 
    $op2 = "blabla";
    function foo($op1)
    {
        echo $op1;
        echo $op2;
    }
    foo("hello");
?>

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Q: What will be the output of the following PHP code? < ?php $op2 = "blabla"; function foo($op1) { echo $op1; echo $op2; } foo("hello"); ?>