How to add a value to a php array

Method: 1. Use "array_unshift(array, value)" to add the value at the beginning; 2. Use "array_push(array, value)" to add the value at the end; 3. Use "$array name[]= Value;" adds the value at the end; 4. Use "array_splice(array, position, 0, value)" to insert the value at the specified position.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer

Add to the php array 4 methods of a value

Method 1: Use array_unshift()

The array_unshift() function can insert a new value at the beginning of the array

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

array_unshift($arr, &#39;cherry&#39;);

echo "增加后的数组：" ;
var_dump($arr);
?>

Note: array_unshift() function will change the original array

Method 2: Use array_push() function

array_push() function can insert a new value at the end of the array

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

array_push($arr, &#39;cherry&#39;);

echo "增加后的数组：" ;
var_dump($arr);
?>

Note: array_push() function will also change the original array

method 3: Use $arr[]=value; statement

This statement can add an element to the end of the array element

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

$arr[]=true;

echo "增加后的数组：" ;
var_dump($arr);
?>

Note: This method will also change the original array

Method 4: Use array_splice() function

array_splice() can be inserted at any position New element

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

echo "增加后的数组：" ;
array_splice($arr,3,0,&#39;pie&#39;); //在第三个元素后插入一个元素
var_dump($arr);
?>

Note: The array_splice() function will also change the original array

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