Learn four functions for distinguishing values ​​in php arrays

$array1 = array("a" => "green", "red", "blue");
$array2 = array("b" => "green", "yellow", "red");
$result = array_intersect($array1, $array2);
?>

The above example will output: Array ( [a] => green [0] => red )

2.array_intersect_assoc() Based on the previous function, return key-value pairs with the same key and value in all arrays.

Example:

$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red") ;
$array2 = array("a" => "green", "yellow", "red");
$result_array = array_intersect_assoc($array1, $array2);
?>

The above example will output: Array ( [a] => green )

3.array_diff() Carries multiple arrays and returns a new array composed of all the values ​​that are in the first array but not in the following arrays. The corresponding keys are taken from the first array.

Example:

$array1 = array("a" => "green", "red", "blue", "red");
$array2 = array( "b" => "green", "yellow", "red");
$result = array_diff($array1, $array2);
print_r($result);
? >

The above example will output: Array ( [1] => blue )

4.array_diff_assoc() Based on the previous function, not only the values ​​but also the keys need to be matched.

Example:

$array1 = array ("a" => "green", "b" => "brown", "c" => "blue", "red") ;
$array2 = array ("a" => "green", "yellow", "red");
$result = array_diff_assoc($array1, $array2);
?>

The above example will output: Array ( => brown [c] => blue [0] => red )