php add to array

add Element to the end of array using array_push($arrayName, Val1 , Val2 ,etc ..)

Example 

<?php
    echo'<pre>';
    $array    = [1,2,3];
    array_push($array,4,5);
    print_r($array);
    echo'</pre>';
?>

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
)

when keys are not important $arrayName [ ] = Val ;  in this case, the value of the key will be plus one more than the last integer keys.

You can put the key-value integer or text within the brackets [ ]

If the key name is repeated, it will change the value to the new value and will not cause any problems.

Example

<?php
    echo'<pre>';
    $array       = [1,2,3];
    $array[88]   = 4;
    $array['QA'] = 5;
    $array[]     = 6;
    print_r($array);
    echo'</pre>';
?>

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [88] => 4
    [QA] => 5
    [89] => 6
)