一、关于 PHP 语言来编码和解码 JSON 对象
1、json_encode(),json_decode()
简单来理解:
json_encode() : 对变量进行编码
json_decode() : 对变量进行解码
深入剖析:
json_encode(编码)
语法:string json_encode ( $value [, $options = 0 ] )
- value: 要编码的值。该函数只对 UTF-8 编码的数据有效。
- options:由以下常量组成的二进制掩码:JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK,JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJEC
示例1:
<?php $arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5); echo json_encode($arr); ?>
结果:{"a":1,"b":2,"c":3,"d":4,"e":5}
分析:将 PHP 数组转换为 JSON 格式数据
json_decode(解码)
语法:json_decode ($json_string [,$assoc = false [, $depth = 512 [, $options = 0 ]]])
示例:
<?php $json = '{"a":1,"b":2,"c":3,"d":4,"e":5}'; var_dump(json_decode($json)); var_dump(json_decode($json, true)); ?>
结果:
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) }
分析:解码是将json格式转化为数组或者对象形式