How to convert json to array type in php

In PHP, you can use the json_decode() function to convert json data into an array type. You only need to specify the second parameter of the function as a Boolean value "true" to decode the JSON value into an association. Array; the syntax format is "json_decode($json, true)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

PHP json_decode() function

The json_decode() function can convert a JSON-encoded string into the appropriate PHP data type. By default, the json_decode() function will return an object.

<?php
$json = &#39;{"Peter":65,"Harry":80,"John":78,"Clark":90}&#39;;
var_dump(json_decode($json));
?>

Output result:

#However, you only need to specify the second parameter of the function as a Boolean value "true" to decode the JSON value into an associative array.

<?php
$json = &#39;{"Peter":65,"Harry":80,"John":78,"Clark":90}&#39;;
var_dump(json_decode($json, true));
?>

Output result:

Let’s take a look at the basic syntax of the json_decode() function:

json_decode( $json, $assoc = FALSE, $depth = 512, $options = 0 )

json_decode() function accepts The four parameters, as described above, are as follows:

• json: It contains the JSON string that needs to be decoded. It only works with UTF-8 encoded strings.

• assoc: It is a Boolean variable. If true, the returned object will be converted to an associative array.

• depth: It represents the user-specified recursion depth.

• options: It includes bitmask of JSON_OBJECT_AS_ARRAY, JSON_BIGINT_AS_STRING, JSON_THROW_ON_ERROR.

Return value: This function returns the encoded JSON value in the appropriate PHP type. If the json cannot be decoded or the encoded data is deeper than the recursion limit, NULL is returned.

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