如何在php中使用正则表达式搜索XML文件

Question

I am curious if I can search an XML file for a certain tag with regular expressions. I can search the file if I use fopen('foo.xml'); but it will only allow me to search the content between the tags not the tags them self. My objective for this is I hope to create a function that will allow me to delete all the content between two tags for example between users which are in a xml file. He language that I am using is PHP.

Thanks in advance john.

Answer 1

You should use something like SimpleXMLto handle/edit XML files.

If you really insist on doing it by treating the SML file as a string you can do something like this (or you can use regex). But you should use an XML library.

// get your file as a string 
$yourXML = file_get_contents($file) ;

$posStart = stripos($yourXML,'<users>') + strlen('<users>') ;
$posEnd = stripos($yourXML,'</users>')  ;

$newXML = substr($yourXML,0,$posStart) . substr($yourXML,$posEnd) ;

// <users> is now empty
echo $newXML ;