PHP associative array implementation method for deleting elements based on element values _php tips

The example of this article describes the method by which the PHP associative array implementation deletes elements based on element values. Share to everyone for your reference. Specifically as follows:

<?php 
$array 1 = Array ("A" => "green", "Red", "Blue", "Red"); 
$array 2 = Array ("B" => "green"); 
$result = Array_diff ($array 1, $array 2);
This is equivalent to removing the element "green" in the $array1. 
Print_r ($result); 
? >

There is another way, more complex than the above, but the effect is the same:

Function Removearrayelement (& $ar, $val)
{
$tmp = array ();
foreach ($ar as $k => $arc)
{
  if ($arc!= $val)
  {
  $tmp [$k]= $arc;
  }
}
$ar = $tmp;
Unset ($tmp);

I hope this article will help you with your PHP program design.