array_push() function in PHP: how to add elements to the end of an array

Array_push() function in PHP: How to add elements to the end of the array, with code examples

In PHP, arrays are a very important kind of data Type, which allows us to save and organize multiple values. Sometimes, we need to add new elements to an existing array. PHP provides an array_push() function to conveniently add elements to the end of an array. This article will introduce the usage of array_push() function and provide specific code examples.

First, let’s take a look at the syntax of the array_push() function:

array_push( $array, $element1, $element2, ... )

array_push() Functions accept two or more parameters. The first parameter is the array to which elements are to be added, and the following parameters are the elements to be added. We can add multiple elements at once and they will be added to the end of the array in the order of parameters.

Here is a simple example that demonstrates how to add elements to an array using the array_push() function:

$fruits = array("apple", "banana", "orange");
array_push($fruits, "grape", "watermelon");

print_r($fruits);

Output result:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => grape
    [4] => watermelon
)

In the above example, we First, an array containing three fruits is created. We then added two new fruits, "grape" and "watermelon", to the array using the array_push() function. Finally, we use the print_r() function to print the array, and we can see that the new fruit has been successfully added to the end of the array.

It should be noted that the array_push() function will add new elements to the end of the array and return the new length of the modified array. If we only care about adding elements and don't need to know the new length, we can ignore the return value. If the first argument passed to the array_push() function is not a valid array, an E_WARNING level error will be thrown.

In addition, in addition to the array_push() function, we can also use simple array syntax to add elements to the end of the array. For example, the same effect can be achieved using:

$fruits = array("apple", "banana", "orange");
$fruits[] = "grape";
$fruits[] = "watermelon";

print_r($fruits);

The output result is the same as using the array_push() function.

To summarize, the array_push() function is a very convenient function in PHP that can help us add elements to the end of the array. It's very simple to use, you just need to provide the array to which you want to add elements and the elements you want to add. If you want to add multiple elements at once, just list them one after another in the function call. Alternatively, we can use simple array syntax to achieve the same effect. Either way, you can flexibly manage and manipulate data in the array.

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