How to convert json into array in php

In PHP, you can convert json into an array through the json_decode function. The function of this function is to decode the string in JSON format. Its syntax is "json_decode ( string $json , bool $assoc=false.. .)".

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

json_decode

(PHP 5 >= 5.2.0, PHP 7, PHP 8, PECL json >= 1.2.0)

json_decode — Decode JSON format string

Description

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

Accepts a JSON encoded string and converts it into a PHP variable

Parameters

json

The json string format string to be decoded .

This function can only handle UTF-8 encoded data.

Note:

PHP implements a superset of JSON.

assoc

When this parameter is true, array will be returned instead of object.

depth

Specifies the recursion depth.

options

Mask consisting of JSON_BIGINT_AS_STRING, JSON_INVALID_UTF8_IGNORE, JSON_INVALID_UTF8_SUBSTITUTE, JSON_OBJECT_AS_ARRAY, JSON_THROW_ON_ERROR. The behavior of these constants is further described on the JSON constants page.

Return Value

Returns data encoded in json via the appropriate PHP type. The values ​​true, false and null will return true, false and null accordingly. If json cannot be decoded, or the encoded data depth exceeds the recursion limit, null will be returned.

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Example #1 Example of json_decode()

<?php
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
var_dump(json_decode($json));
var_dump(json_decode($json, true));
?>

The above routine Will output:

object(stdClass)#1 (5) {
    ["a"] => int(1)
    ["b"] => int(2)
    ["c"] => int(3)
    ["d"] => int(4)
    ["e"] => int(5)
}
array(5) {
    ["a"] => int(1)
    ["b"] => int(2)
    ["c"] => int(3)
    ["d"] => int(4)
    ["e"] => int(5)
}

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