There is a case when you require to add a value or key/value pair after a specific key in an array.
Here’s the simple PHP function which you can use to achieve this. If the key doesn’t exist, value is appended to the end of the array
/**
* Insert a value or key/value pair after a specific key in an array. If key doesn't exist, value is appended
* to the end of the array.
*
* @param array $array
* @param string $key
* @param array $new
*
* @return array
*/
function array_insert_after( array $array, $key, array $new ) {
$keys = array_keys( $array );
$index = array_search( $key, $keys );
$pos = false === $index ? count( $array ) : $index + 1;
return array_merge( array_slice( $array, 0, $pos ), $new, array_slice( $array, $pos ) );
}