$colors = array("blue","green","red");
//delete element in array by value "green"
if (($key = array_search("green", $colors)) !== false) {
unset($colors[$key]);
}if (in_array('strawberry', $array))
{
unset($array[array_search('strawberry',$array)]);
}$items = ['banana', 'apple'];
unset($items[0]);
var_dump($items); // ['apple']if (($key = array_search('strawberry', $array)) !== false) {
unset($array[$key]);
}array_diff( [312, 401, 15, 401, 3], [401] ) // removing 401 returns [312, 15, 3]
// https://stackoverflow.com/questions/7225070/php-array-delete-by-value-not-key#:~:text=with%20one%20element.-,array_diff(%20%5B312%2C%20401%2C%2015%2C%20401%2C%203%5D%2C%20%5B401%5D%20)%20//%20removing%20401%20returns%20%5B312%2C%2015%2C%203%5D,-It%20generalizes%20nicelyarray_diff( array(312, 401, 15, 401, 3), array(401) ) // removing 401 returns [312, 15, 3]