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PHP Build a Simple PHP Application Working With Functions Introducing User-Defined Functions

where am l missing it

i want to call a function called mimic_array_sum and then store the value in the variable $sum and then display the sum.

palindromic_primes.php
<?php
$sum;
function mimic_array_sum($array){
$a=0;
  foreach($array as $element){
    $a=$a+ $element;
  }
return $a;
}

 $sum =  mimic_array_sum();


      echo $sum;





$palindromic_primes = array(11, 757, 16361);

?>

Your function mimic_array_sum requires a parameter to be passed to it, but when you call the function you aren't passing anything in. Try passing an array in to the function and see if it works then.

1 Answer

Jason Brady
Jason Brady
17,372 Points

You've got all the pieces there... Your function requires an array to be passed into it. Here is something that would work...

<?php
$sum = 0;
$palindromic_primes = array(11, 757, 16361);

function mimic_array_sum($array){
  $a=0;
  foreach($array as $element){
    $a += $element;
  }
  return $a;
}

$sum =  mimic_array_sum($palindromic_primes);

echo $sum;
?>