How to convert json to php array object array

How to convert json to php array object array: 1. Create a PHP sample file; 2. Convert JSON to PHP array object "$data" through the "json_decode()" function, and its syntax is "mixed json_decode" (string $json, bool $assoc = false,...)"; 3. Use the "var_dump()" function to output the value of "$data".

Operating system for this tutorial: Windows 10 system, PHP version 8.1.3, Dell G3 computer

You can use PHP’s built-in json_decode() function to Convert JSON to PHP array object.

The syntax of this function is as follows:

mixed json_decode(string $json, bool $assoc = false, int $depth = 512, int $options = 0)

Among them, $json is the JSON string to be converted, $assoc indicates whether to convert the return result into an associative array, the default is false, $depth represents the maximum recursion depth, which defaults to 512. $options represents the options passed to the JSON decoder.

The following is a complete example:

$json = '{"name": "张三", "age": 20, "skills": ["PHP", "MySQL", "JavaScript"]}';
$data = json_decode($json, true);
 
var_dump($data);

The output is as follows:

array(3) {
  ["name"]=>
  string(6) "张三"
  ["age"]=>
  int(20)
  ["skills"]=>
  array(3) {
    [0]=>
    string(3) "PHP"
    [1]=>
    string(5) "MySQL"
    [2]=>
    string(10) "JavaScript"
  }
}

In this example, we define a JSON string and then use the json_decode() function Convert it to a PHP array object $data. Finally, use the var_dump() function to output the value of $data, and you can see that it has been successfully converted into a PHP array object.

It should be noted that if the JSON string contains special characters (such as newlines, tabs, etc.), you may need to use the fourth parameter ($options) of the json_decode() function to convert it Set the JSON_UNESCAPED_UNICODE option to avoid escape characters. For example:

$json = '{"name": "张三\n李四", "age": 20}';
$data = json_decode($json, true, 512, JSON_UNESCAPED_UNICODE);
 
var_dump($data);

The output result is as follows:

array(2) {
  ["name"]=>
  string(7) "张三
李四"
  ["age"]=>
  int(20)
}

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