php array_splice_assoc (array_splice associative)

array_splice_assoc.php

<?php
/**
  PHP array_splice doesn't use associative replacement keys, so i wrote the below method to do that.
*/

function array_splice_assoc(array &$original, int $offset, int $length = 0, $replacement = null) {
    $slice = array_slice($original, 0, $offset, true);

    if (!is_null($replacement)) {
        // cast to array
        $replacementArray = is_array($replacement) ? $replacement : [$replacement];

        $slice = array_merge($slice, $replacementArray);
    }

    $original = array_merge($slice, array_slice($original, $offset+$length, null, true));

    return $original;
}

/**
  here we have 2 examples:
  
  1- array splice 
  2- array associative splice
*/

// example of array splice:

$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("a"=>"purple","b"=>"orange");
array_splice($a1,0,2,$a2);
print_r($a1); // Array ( [0] => purple [1] => orange [c] => blue [d] => yellow )


// example of array splice associative:

$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("a"=>"purple","b"=>"orange");
array_splice_assoc($a1,0,2,$a2);
print_r($a1); // Array ( [a] => purple [b] => orange [c] => blue [d] => yellow )