How to Use PHP’s array_push() Function to Append Elements to an Array

In PHP programming, arrays are commonly used, and adding elements to the end of an existing array can be done quickly with the array_push() function.

The syntax of array_push() is:

array_push(array &$array, mixed $value1, mixed $value2, ...)

Parameters:

&$array: the array to which elements will be added (required).

$value1, $value2, ...: one or more elements to append (required).

Example of adding single elements:

<?php
// Create an empty array
$fruits = array();

// Add elements
array_push($fruits, "apple");
array_push($fruits, "banana");
array_push($fruits, "orange");

// Output array
print_r($fruits);
?>

The output will be:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)

The function also supports adding multiple elements at once:

<?php
$numbers = array(1, 2);

// Add multiple elements
array_push($numbers, 3, 4, 5);

print_r($numbers);
?>

The resulting output is:

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

Note that array_push() returns the new length of the array after insertion, which can be captured in a variable:

<?php
$myArray = array(1, 2);

// Add elements and get new length
$length = array_push($myArray, "a", "b", "c");

echo "New array length: " . $length;
?>

The above code outputs:

New array length: 5

In summary, array_push() is a convenient PHP function for quickly appending one or more elements to the end of an array, helping to simplify code and improve development efficiency.