array_slice()
can be used to extract parts of the array, and the union array operator (+
) can recombine the parts.
$res = array_slice($array, 0, 3, true) +
array("my_key" => "my_value") +
array_slice($array, 3, count($array)-3, true);
This example:
$array = array(
'zero' => '0',
'one' => '1',
'two' => '2',
'three' => '3',
);
$res = array_slice($array, 0, 3, true) +
array("my_key" => "my_value") +
array_slice($array, 3, count($array) - 1, true) ;
print_r($res);
gives:
Array ( [zero] => 0 [one] => 1 [two] => 2 [my_key] => my_value [three] => 3 )