如何使用正则表达式提取CDATA之间的字符串部分？

How can I extract a string enclosed in CDATA tag using php? For instance I have

$str = "<![CDATA[this is my text]]>";

Using regex how can I extract the string "this is my text"?

You can use this regex: /<!\[CDATA\[(.*?)\]\]>/:

$str = "<![CDATA[this is my text]]>";

$matches = array();
preg_match('/<!\[CDATA\[(.*?)\]\]>/', $str, $matches);
echo $matches[1]; // this is my text

The regex looks for <![CDATA[ followed by any characters until the first ]]> is encountered.

if your string always starts with <![CDATA[ and ends with ]]> you can use substr()

$str = "<![CDATA[this is my text]]>";
$output = substr($str,9,strlen($str)-12);
echo $output;