Extract H1, H2, H3 heading tags from a HTML page using a regular expression

Posted At : 25 August 2009 09:12 | Posted By : BS Admin
Related Categories: ColdFusion Regular Expressions

To heading tags from a string, you can use the following regular expression.

<cfset myString = "<h1>Welcome to my site</h1>">
<cfset regex = "(<h1.*?>)(.*?)(</h1>)">
<cfset tx = reFindNoCase(regex, mystring, 1, true)>
<cfif tx.pos[1] gt 0>
     <cfset theResult = mid(myString, tx.pos[3], tx.len[3])>
     <cfoutput>H1 is: #theResult#</cfoutput>
</cfif>

Alternatively, you could use <cfset regex = "(<h[0-9]{1}.*?>)(.*?)(</h[0-9]{1}>)"> which would match all H1, H2, H3 etc and you could then loop over the complete page to extract them all.

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Validate an email address in ColdFusion using regular expressions (regexp)

Posted At : 11 January 2008 09:42 | Posted By : BS Admin
Related Categories: ColdFusion Regular Expressions

To validate an email address in ColdFusion, we use the regular expression shown below.

You could easily add this to a CFC if you wanted to return a true or false depending whether the email address validates or not.

<cfset myEmail = "test@test.com">
<CFIF REFindNocase("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*\.(([a-z]{2,3})|(aero|coop|info|museum|name))$", trim(myEmail))>
Valid email address
<cfelse>
Oops, email address does not validate
</cfif>
 

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Regular Expression (regexp) to remove all HTML tags from a string

Posted At : 05 January 2008 12:08 | Posted By : BS Admin
Related Categories: ColdFusion Regular Expressions

To remove all HTML tags from a string, you can use the following regular expression.

This could be used to stop HTML being injected into URL values. Or even just for creating plain text content from a HTML page.

<cfset myString = "<a href='/link.cfm'>Link to my page</a>">
<cfset myString = reReplaceNoCase(myString, "</?\w+(((\s|\n)+\w+((\s|\n)*=(\s|\n)*(?:#chr(34)#.*?#chr(34)#|'.*?'|[^'#chr(34)#>\s]+))?)+(\s|\n)*|(\s|\n)*)/?>", "", "All")>
<cfoutput>There should be no hyperlink: #myString#</cfoutput>
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Remove hyperlinks ( A tags ) from HTML - ColdFusion regular expression

Posted At : 07 January 2007 18:16 | Posted By : BS Admin
Related Categories: ColdFusion Regular Expressions

If ever you want to remove hyperlinks from a HTML page - here you go.

This code assumes a variable has been created called myFile that has either been pulled from CFHTTP, a stored local file or from the ColdFusion page output:-

<cfset myFile = "<a href='www.mysite.com'>Click here for my site</a>">
<cfset myFile = ReReplaceNoCase(myFile, "(<a.*?>)(.*?)(</a>)", "\2", "all")>
<cfoutput>Replaced content: #myFile#</cfoutput>
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Extract HTML page title - ColdFusion regular expression

Posted At : 05 January 2007 09:44 | Posted By : BS Admin
Related Categories: ColdFusion Regular Expressions

To extract a page title from a HTML page that has either been pulled from CFHTTP, a stored local file or from the ColdFusion page output:-

<cfset pageTitle = "">
<cfset RegExp = REFindNoCase("(<title[>])(.*)(<\/title>)", myFile, 1, True)>
<cfif RegExp.len[1] gt 0>
  <cfset pageTitle = mid(myFile, RegExp.pos[3], RegExp.len[3])>
</cfif>
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