PHP function exploration-array_push()

PHP is a very popular server-side programming language. As a PHP developer, it is very important to be proficient in the use of various functions. This article will explore a common array function in PHP - array_push().

array_push() function is used to add one or more elements to the end of an array. Therefore, it is considered an optimized method for this operation. The syntax of this function is as follows:

array_push(array $array , mixed $value1 [, mixed $... ] ) : int

Here, the $array parameter is the array to which elements need to be added. $value1 and the following parameters are elements to be added to the array. This function inserts the given element into the end of the array and returns the new length of the updated array.

The following are some examples of how to use the array_push() function.

<?php
$fruits = array("apple", "banana");

// 添加元素到数组中
array_push($fruits, "orange"); 
print_r($fruits); // Array ( [0] => apple [1] => banana [2] => orange )

// 添加多个元素到数组中
array_push($fruits, "lemon", "grape"); 
print_r($fruits); // Array ( [0] => apple [1] => banana [2] => orange [3] => lemon [4] => grape )
?>

As you can see, in the above example, we added one element and multiple elements to the array, all of which were successfully sent to the end of the array, and the function also correctly returned the new value of the updated array. length.

In addition to using the array_push() function, we can also use another built-in PHP function-[]. This method is simpler and more flexible than array_push().

<?php
$fruits = array("apple", "banana");
$fruits[] = "orange"; // 添加一个元素到末尾
print_r($fruits); // Array ( [0] => apple [1] => banana [2] => orange )

$fruits[] = "lemon"; // 再添加一个元素
print_r($fruits); // Array ( [0] => apple [1] => banana [2] => orange [3] => lemon )
?>

In the above example, we have easily added elements to the array by using [] after the array name.

In short, whether you use the array_push() function or the [] operator, they can easily add one or more elements to the end of the array. Using the [] operator is simpler and more direct than array_push(), and does not incur any function call overhead. Therefore, you may wish to try using [] for array operations in future PHP development work.

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