How to insert data into an array in php

In PHP, there are many ways to insert data into an array. We will explain them one by one below.

1. Use array index to insert data

The most basic method to use array index to insert data. The code example is as follows:

//新建一个数组
$fruits = array();
 
//插入数据
$fruits[0] = '苹果';
$fruits[1] = '橙子';
$fruits[2] = '香蕉';

In the above code, a new array named $fruits is created, and then the data is inserted into the array using square brackets and index values. Using this method, new data can be added to the array at any time.

2. Use the array_push() function to insert data to the end of the array

array_push() The function is used to add one or more elements to the end of the array. The code example is as follows:

//新建一个数组
$fruits = array();
 
//使用 array_push() 添加数据
array_push($fruits,'苹果','橙子','香蕉');

In the above code, a new array named $fruits is created, and then the array_push() function is used to add apples, oranges and bananas to the end of the array.

3. Use the array_unshift() function to insert data to the beginning of the array

array_unshift() The function is used to insert one or more elements at the beginning of the array. The code example is as follows:

//新建一个数组
$fruits = array();
 
//使用 array_unshift() 插入数据
array_unshift($fruits,'苹果');
array_unshift($fruits,'橙子');
array_unshift($fruits,'香蕉');

In the above code, a new array named $fruits is created, and the array_unshift() function is used to shift bananas, oranges and apples in sequence Insert into the beginning of the array.

4. Use the assignment operator to insert data into the array

Using the assignment operator to directly assign the array value to a new element is another common method. The code example is as follows:

//新建一个数组并设置默认值
$fruits = array('苹果','橙子','香蕉');
 
//使用赋值运算符插入数据
$fruits[] = '葡萄';

In the above code, a new array named $fruits is created and assigned using square brackets and a null value. This adds the new value to the end of the array.

5. Use the array_merge() function to merge arrays

array_merge() The function merges one or more arrays into one array and returns the merged array. The code example is as follows:

//新建两个数组
$fruits = array('苹果','橙子');
$more_fruits = array('香蕉','葡萄');
 
//使用 array_merge() 函数合并数组
$all_fruits = array_merge($fruits,$more_fruits);

In the above code, the array_merge() function is used to merge the $fruits and $more_fruits arrays into $all_fruits array.

Summary

These methods are the most commonly used methods for inserting data into arrays. You can choose the method that suits your project needs and use the method that suits you best.

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