How to convert json string to array, object or array in php

PHP is a very popular programming language often used for web development. In web development, data in JSON format is often used. JSON (JavaScript Object Notation) is a lightweight data exchange format that is widely used in modern web development, and developers of different programming languages ​​know its importance.

In PHP, you can use a very simple function to convert a JSON string into an array, object, or array of objects. This article will introduce how to convert JSON strings in PHP.

1. Convert JSON string to array

In PHP, you can use the built-in function json_decode() to convert a JSON string into an array. The following is a basic example:

//JSON字符串
$json_string = '{"name":"Alice","age":25,"gender":"Female"}';
 
//将JSON字符串转为数组
$array = json_decode($json_string, true);
 
//输出
print_r($array);

In the above code, the first parameter of the json_decode() function is the JSON string to be converted, and the second parameter is an optional parameter used to specify The type returned. If set to true, it means converting the JSON string into an array; if set to false or not specified, it means converting the JSON string into an object.

2. Convert JSON string to object

In PHP, you can use the built-in function json_decode() to convert a JSON string into an object. The following is a basic example:

//JSON字符串
$json_string = '{"name":"Alice","age":25,"gender":"Female"}';
 
//将JSON字符串转为对象
$obj = json_decode($json_string);
 
//输出
echo $obj->name; // Alice
echo $obj->age; // 25
echo $obj->gender; // Female

In the above code, the first parameter of the json_decode() function is the JSON string to be converted, and the second parameter is an optional parameter used to specify The type returned. If set to true, it means converting the JSON string into an array; if set to false or not specified, it means converting the JSON string into an object.

3. Convert a JSON string to an object array

In PHP, you can use the built-in function json_decode() to convert a JSON string into an object array. The following is a basic example:

//JSON字符串
$json_string = '[{"name":"Alice","age":25,"gender":"Female"},{"name":"Bob","age":30,"gender":"Male"}]';
 
//将JSON字符串转为对象数组
$array = json_decode($json_string);
 
//输出
echo $array[0]->name; // Alice
echo $array[0]->age; // 25
echo $array[0]->gender; // Female

echo $array[1]->name; // Bob
echo $array[1]->age; // 30
echo $array[1]->gender; // Male

In the above code, the first parameter of the json_decode() function is the JSON string to be converted, and the second parameter is an optional parameter used to specify The type returned. If set to true, it means converting the JSON string into an array; if set to false or not specified, it means converting the JSON string into an object.

Summary

In PHP, you can use the built-in function json_decode() to quickly convert a JSON string into an array, object, or array of objects. In web development, JSON formatted data is often used to load data asynchronously, making web pages more flexible and efficient.

The above is the method introduced in this article about converting JSON strings to arrays, objects and object arrays in PHP. Hope it helps readers.

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