How to convert data in jQuery into a PHP array

In web development, we often need to use jQuery to obtain and process data, and then pass the obtained data to the background program for further processing, and return the processing results to the front end. The background program usually uses PHP language for processing. Therefore, in this case, we need to convert the data obtained by the front-end using jQuery into a PHP array for processing by the background program. This article will introduce how to convert data in jQuery into a PHP array.

1. Data format in jQuery

In jQuery, we usually use the $.ajax() method to obtain and process data asynchronously. When requesting the background program, we need to pass the request parameters to the background program in the form of JSON data.

For example:

$.ajax({

url: 'test.php',
type: 'POST',
dataType: 'json',
data: {
    name: 'John',
    age: 18
},
success: function(data) {
    //处理后台返回的数据
}

});

In this example, we passed two parameters: name and age , where the values ​​are 'John' and 18 respectively.

2. Convert jQuery data into PHP array

We can use PHP’s $_POST variable to receive data from the front end, as shown below:

$name = $_POST['name'];
$age = $_POST['age'];

However, if we need to pass multiple parameters, we need to write a lot of variables to receive the data, which is not convenient , and error-prone. Therefore, we can convert the data passed by the front end into a PHP array for subsequent processing.

1. Use the serializeArray() method

The serializeArray() method can convert all data in the form into an array. For example:

<input>
<input>

<script></script>

var formData = $('#form1').serializeArray();
console.log(formData);

script>

After executing the above code, you can see the output array data in the browser console, as shown below:

[{name: 'name', value: 'John'} , {name: 'age', value: '18'}]

2. Use the $.param() method

$.param() method to convert an array into something similar to The form of the query string. For example:

var params = {name: 'John', age: 18};
var queryString = $.param(params);
console.log(queryString);

After executing the above code, you can see the output query string in the browser console, as shown below:

name=John&age=18

3. Use JSON.stringify() Method

If the frontend is using JSON format data, we can use the JSON.stringify() method to convert it to a string, and then use the json_decode() method in PHP to convert it to an array. For example:

var jsonData = [{name: 'John', age: 18}, {name: 'Tom', age: 20}];
var jsonString = JSON.stringify(jsonData);

Use json_decode() to decode in PHP:

$array = json_decode($jsonString);
echo $array[0]->name; //John

4. Summary

This article introduces three methods of converting data in jQuery into PHP arrays: using the serializeArray() method, $.param() method and JSON.stringify() method. Choose different methods according to the situation and convert the data into a PHP array for subsequent processing.

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