I tried using regex by using foreach loop for .xml files as there are many .xml files and for .html file as it is only one file I just opened, read and closed the directory. But when it comes to searching for a particular pattern in both the files, the code doesn't enter the while/if loop. Can please someone help me.

Update

@Thanks to all for your help. Is there any other way to proceed other than using parsers; since, I am still having problem of getting into the loop and getting the desired output. Any print statement above the loop gets executed but when I want the execute the print statement of the loop nothing gets printed. 
Desired output:
If <gname>ABC</gname> of xml file does not match "ABC"(case sensitive 
+or spelling mistakes etc)with that of <p>abc</p> of html file "abc", 
+then it should notify the error.

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In reply to How to compare the data of two files (.xml and .html) using perl(regex)? by flora

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