Delete a value element in an array_PHP tutorial

Delete a certain value element in the array. This example uses the php array_diff function to delete a certain value element in the array. The method is very simple. Just use foreach and add the array_diff function. ​

Delete a value element in the array
This example is to use the php tutorial array_diff function to delete a certain value element in the array. The method is very simple. Just use foreach and add the array_diff function
*/

$a1 = array(array('blue','red','www.bkjia.com'),array('black','pink','green'));
$a2 = array('aaa','pink','bbbb');
$str = 'red';
$a2[] = $str;
foreach($a1 as $key => $value)
{  
$a1[$key] = array_diff($value,$a2);
}
print_r($a1);

//Simpler way

foreach (array_diff($a1, $a2) as $_key_1) {
          $arr_new[$_key_1] = $arr_1[$_key_1];
}

/*
The results are as follows:

array
(
[0] => array
(
                                                                      [0] => blue
                                                                                                                                                                [2] => yellow
)

[1] => array
(
                                                 [0] => black
                                                                                                                                                                [2] => )

)

Returns the difference comparing array1 and array2.
*/
$array1 = array("a" => "green", "php100.com", "blue", "red");
$array2 = array("b" => "green", "yellow", "red");
$result = array_diff($array1, $array2);

array
(
[1] => blue
)