CODEWITHSUNDEEP
phparraysmultidimensional-array
Joe Yahchouchi
Joe Yahchouchi

Reputation: 626

changing php array value

I have this very very basic code 

  foreach ($formatted_results as $result) {
          $result['profile_pic']="joe";//set all values to joe
              var_dump( $result['profile_pic']);//prints joe
        }
  foreach ($formatted_results as $result) {

              var_dump( $result['profile_pic']);//does not print joe!
        }

where formatted_results is an array containing other arrays. Now as you can see, I am modifying in the first loop the value of every array within formatted_results to contain the name joe, and then I am printing that to make sure and sure enough, the print of the first loop returns "joe"

However, the value I set is not persisting somehow, as when I loop that same array again to check the inner values of its own arrays, it gives me the old value.

The code is exactly as I am displaying it here, there is nothing in between. I am guessing there is something about pointers that is eluding me here.

Upvotes: 1

Views: 88

Answers (2)

Sougata Bose
Sougata Bose

Reputation: 31749

The value is not set to the actual array, rather assigned to the current element which is not available outside the loop. You need to set the value to the actual array you are looping through. Try - 

foreach ($formatted_results as &$result) {
    $result['profile_pic']="joe";//set all values to joe
}

foreach - Pass by reference

Upvotes: 5

Rahul
Rahul

Reputation: 18577

Here is the code :

    foreach ($formatted_results as $k =>  $result) {
          $formatted_results[$k]['profile_pic']="joe";//set all values to joe
              var_dump( $formatted_results[$k]['profile_pic']);//prints joe
        }
  foreach ($formatted_results as $result) {

              var_dump( $result['profile_pic']);//does not print joe!
        }

$result is not gonna save data to $formatted_results

Upvotes: 3

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