关于PHP json_encode()函数
在 php 中使用 json_encode() 内置函数(php > 5.2)可以使用得 php 中数据可以与其它语言很好的传递并且使用它。
这个函数的功能是将数值转换成json数据存储格式。
<?php $arr = array ( 'Name'=>'希亚', 'Age'=>20 ); $jsonencode = json_encode($arr); echo $jsonencode; ?>
程序运行结果如下:
{"Name":null,"Age":20}
json_encode 函数中中文被编码成 null 了,Google 了一下,很简单,为了与前端紧密结合,Json 只支持 utf-8 编码,我认为是前端的 Javascript 也是 utf-8 的原因。
<?php $array = array ( 'title'=>iconv('gb2312','utf-8','这里是中文标题'), 'body'=>'abcd...' ); echo json_encode($array); ?>
这个程序的运行结果为:
{"title":"u8fd9u91ccu662fu4e2du6587u6807u9898","body":"abcd..."}
数组中所有中文在json_encode之后都不见了或者出现u2353等。
解决方法是用urlencode()函数处理以下,在json_encode之前,把所有数组内所有内容都用urlencode()处理一下,然用json_encode()转换成json字符串,最后再用urldecode()将编码过的中文转回来。
<?php /************************************************************** * * 使用特定function对数组中所有元素做处理 * @param string &$array 要处理的字符串 * @param string $function 要执行的函数 * @return boolean $apply_to_keys_also 是否也应用到key上 * @access public * *************************************************************/ function arrayRecursive(&$array, $function, $apply_to_keys_also = false) { static $recursive_counter = 0; if (++$recursive_counter > 1000) { die('possible deep recursion attack'); } foreach ($array as $key => $value) { if (is_array($value)) { arrayRecursive($array[$key], $function, $apply_to_keys_also); } else { $array[$key] = $function($value); } if ($apply_to_keys_also && is_string($key)) { $new_key = $function($key); if ($new_key != $key) { $array[$new_key] = $array[$key]; unset($array[$key]); } } } $recursive_counter--; } /************************************************************** * * 将数组转换为JSON字符串(兼容中文) * @param array $array 要转换的数组 * @return string 转换得到的json字符串 * @access public * *************************************************************/ function JSON($array) { arrayRecursive($array, 'urlencode', true); $json = json_encode($array); return urldecode($json); } $array = array ( 'Name'=>'希亚', 'Age'=>20 ); echo JSON($array); ?>
这次成功了,运行结果如下:
{"Name":"希亚","Age":"20"}

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