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Function to parse special characters in PHP escaped Json

怪我咯
怪我咯Original
2017-04-05 09:47:202142browse

在给一个 App 做 API,从服务器端的 MySQL 取出数据,然后生成 JSON。数据中有个字段叫 content,里面保存了文章内容,含有大量 HTML 标签,这个字段在转 json 的时候需要转义,因为有大量的特殊字符会破坏 json 的结构。

比如这么一段 content:

'Lorem ipsum "dolor" sit amet, consectetur \ adipiscing elit.'

则必须要转化为:

Lorem ipsum \"dolor\" sit amet,\nconsectetur \\ adipiscing elit.

那么有哪些字符是需要转义的呢?看下图:

Function to parse special characters in PHP escaped Json

如果 PHP 版本 > 5.2,json_encode 自带转义。如果是旧版本的 PHP 则可以用下面的函数

# list from www.json.org: (\b backspace, \f formfeed)
public function escapeJsonString($value) { 
	$escapers = array("\\", "/", "\"", "\n", "\r", "\t", "\x08", "\x0c");
	$replacements = array("\\\\", "\\/", "\\\"", "\\n", "\\r", "\\t", "\\f", "\\b");
	$result = str_replace($escapers, $replacements, $value);
	return $result;
}


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