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

Posted by MUZ140770 Selestino Gama
MUZ140770 Selestino Gama
4,980 Points

I don't know where i am doing it wrong. Please help me.

Write the code inside this mimic_array_sum() function. That code should add up all individual numbers in the array and return the sum. You’ll need to use a foreach command to loop through the argument array, a working variable to keep the running total, and a return command to send the sum back to the main code.

palindromic_primes.php 
<?php 

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


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

?>

1 Answer

Christian Andersson
Christian Andersson
8,712 Points

The task is asking you to create a function that takes an array as a parameter, calculates the sum of all the elements within that array, and returns the result. Here is the code:

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

  $sum =  mimic_array_sum($palindromic_primes);
  echo $sum;

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

First we create the variable $palindromic_primes and assign to it an array with the elements 11, 757 and 16361. Then, we call the function mimic_array_sum($palindromic_primes), store the result in $sum and then echo it.

The function micmic_array_sum works as follows:

  • it accepts one parameter called $array.
  • it starts by initializing a variable $a with the value 0.
  • for each element in the array, do:
    • increment the variable $a with that element
    • repeat the above until all the elements have been used.
  • return the result $a.

Hope this helps.

MUZ140770 Selestino Gama
MUZ140770 Selestino Gama
4,980 Points

That was great, thanx for the explanation i do understand the question now.