What to do if php ajax submits Chinese garbled characters

php Ajax submission Chinese garbled solution: 1. Use utf-8 encoding for all data, including database encoding, php encoding and front-end encoding; 2. Use "JSON" and "arrayRecursive" Function that encodes each character separately.

#The operating environment of this article: Windows 7 system, PHP version 7.1, Dell G3 computer.

php uses ajax Chinese garbled problem

In php, after extracting data from the database, we usually extract multiple rows of data at a time. If the front-end js uses When Ajax interacts with the backend, PHP can only echo one data, but we have multiple data, so only one array can be passed. This uses the json_encode() function. The json_encode() function means to convert the data into json. data.

Let’s take a look at how to convert,

php array:

First we create two arrays in php, one contains Chinese, the other contains numbers or English, and finally outputs take a look. Idea: The associated values ​​are more intuitive

$gg=array('a'=>'中国','b'=>'日本','c'=>'美国','d'=>'加拿大','e'=>'法国');
$yy=array('f'=>'6','g'=>'7','h'>='8','i'=>'tom','j'=>'kevin');

Only output one of the arrays:

echo $json=json_encode($gg);

The output result is as follows

{"a":"\u4e2d\u56fd","b":"\u65e5\u672c","c":"\u7f8e\u56fd","d":"\u52a0\u62ff\u5927","e":"\u6cd5\u56fd"}

There are curly brackets on both sides and garbled characters

Put two arrays into one array and output them at the same time

echo $json=json_encode(array($gg,$yy));

The output results are as follows:

[{"a":"\u4e2d\u56fd","b":"\u65e5\u672c","c":"\u7f8e\u56fd","d":"\u52a0\u62ff\u5927","e":"\u6cd5\u56fd"},{"f":"6","g":"7","0":true,"i":"tom","j":"kevin"}]

We can see that after the arrays in the array are formatted in json, the data is installed in [] In the brackets, the arrays inside are in {} braces, but they are still garbled.

For the garbled code problem, there are two methods,

Method 1: All data uses UTF-8 encoding, including encoding from the database, PHP encoding and front-end encoding.

Method 2: Use the following two functions to encode each character separately: (Some symbols seem to be escaped unsuccessfully, so the use of this method is not recommended)

function JSON($array) { 
    arrayRecursive($array, 'urlencode', true); 
    $json = json_encode($array); 
    return urldecode($json); 
}
function arrayRecursive(&$array, $function, $apply_to_keys_also = false){ 
    static $recursive_counter = 0; 
    if (++$recursive_counter > 1000) { 
        die('possible deep recursion attack'); 
    } 
    foreach ($array as $key => $value) { 
        if (is_array($value)) { 
            arrayRecursive($array[$key], $function, $apply_to_keys_also); 
        } else { 
            $array[$key] = $function($value); 
        }                                        
        if ($apply_to_keys_also && is_string($key)) { 
            $new_key = $function($key); 
            if ($new_key != $key) { 
                $array[$new_key] = $array[$key]; 
                unset($array[$key]); 
            } 
        } 
    } 
    $recursive_counter--; 
}

                                                                                                     
#After using these two functions, the output result is:

[{"a":"中国","b":"日本","c":"美国","d":"加拿大","e":"法国"},{"f":"6","g":"7","0":"1","i":"tom","j":"kevin"}]

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