json_encode
PHP json_encode() 用于对变量进行 JSON 编码,该函数如果执行成功返回 JSON 数据,否则返回 FALSE 。
<?php $arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5); echo json_encode($arr); $arr = array ('title'=>$v_title,'message'=>$v_content); echo json_encode($arr); ?>
以上代码执行结果为:
{"a":1,"b":2,"c":3,"d":4,"e":5}
以下实例演示了如何将 PHP 对象转换为 JSON 格式数据:
<?php class Emp { public $name = ""; public $hobbies = ""; public $birthdate = ""; } $e = new Emp(); $e->name = "sachin"; $e->hobbies = "sports"; $e->birthdate = date('m/d/Y h:i:s a', "8/5/1974 12:20:03 p"); $e->birthdate = date('m/d/Y h:i:s a', strtotime("8/5/1974 12:20:03")); echo json_encode($e); ?>
以上代码执行结果为:
{"name":"sachin","hobbies":"sports","birthdate":"08\/05\/1974 12:20:03 pm"}
json_decode
PHP json_decode() 函数用于对 JSON 格式的字符串进行解码,并转换为 PHP 变量。
以下实例演示了如何解码 JSON 数据:
<?php $json = '{"a":1,"b":2,"c":3,"d":4,"e":5}'; var_dump(json_decode($json)); var_dump(json_decode($json, true)); ?>
以上代码执行结果为:
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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