How to convert json string to php variable

In php, you can use the json_decode() function to convert a json string into a PHP variable; this function can be used to decode a JSON string. It accepts a JSON-encoded string and converts it into a PHP variable. , syntax "json_decode($json)".

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

In php, you can use the json_decode() function to convert json string to PHP variable.

The json_decode() function can decode strings in JSON format.

Syntax:

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

The json_decode() function accepts a JSON encoded string and converts it into a PHP variable

Parameters:

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

• assoc: This is a Boolean variable and can be omitted. The default value is false, returning a value of object type; if the value is true, the returned object will be converted to an associative array type.

• depth: used to indicate the user-specified recursion depth, which can be omitted.

• options: Binary mask, which can be omitted. The bit masks that can be included are: JSON_OBJECT_AS_ARRAY, JSON_BIGINT_AS_STRING, JSON_THROW_ON_ERROR.

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 depth of the encoded data exceeds the recursion limit, null will be returned.

Example:

<?php
$json = &#39;{"a":1,"b":2,"c":3,"d":4,"e":5}&#39;;

var_dump(json_decode($json));
var_dump(json_decode($json, true));

?>

The above routine will output:

Recommended learning: "PHP Video Tutorial》

The above is the detailed content of How to convert json string to php variable. For more information, please follow other related articles on the PHP Chinese website!