How to delete associative array elements in php

php method to delete associative array elements: first create a PHP sample file; then define a "removeArrayElement" method; then delete elements in the associative array through loop traversal.

php method to delete associative array elements:

$array1 = array("a" => "green", "red", "blue", "red");
$array2 = array("b" => "green");
$result = array_diff($array1, $array2);
//这样就相当于删除$array1里的值为"green"的元素。
print_r($result);
?>

There is another method, which is more complicated 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);
}

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