PHP: json_decode

json_decode

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

json_decode对 JSON 格式的字符串进行编码

说明

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

接受一个 JSON 格式的字符串并且把它转换为 PHP 变量

参数

json

待解码的 json string 格式的字符串。

This function only works with UTF-8 encoded data.

assoc

当该参数为 TRUE 时,将返回 array 而非 object

depth

User specified recursion depth.

options

Bitmask of JSON decode options. Currently only JSON_BIGINT_AS_STRING is supported (default is to cast large integers as floats)

返回值

Returns the value encoded in json in appropriate PHP type. Values true, false and null (case-insensitive) are returned as TRUE, FALSE andNULL respectively. NULL is returned if the json cannot be decoded or if the encoded data is deeper than the recursion limit.

范例

Example #1 json_decode() 的例子

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

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

?>

以上例程会输出:

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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