Re: How to search for all occurences of a string in a text?

[Jason Fisher]

Start by simplifying the regex:

<cfset reg = """[^""]+/([^""/]+\.(jpg|gif|png))""" />

(It just gets every image reference inside double-quotes.)

Then use REMatchNoCase() to get an array of all matches:

<cfset test = reMatchNoCase(reg, string) />

(REFindNoCase() only gets one match, so it only works if you put it 
inside a conditional loop.)

Then loop over the array and get the last "list" element using the "/" 
as the delimiter (and also strip out the trailing quote):

<cfoutput>
<cfloop array="#test#" index="a">
     #listLast(listLast(a, """"), "/")#
<br />
</cfloop>
</cfoutput>


On 11/18/2011 7:32 PM, marc -- wrote:
> Hi,
>
> I have a series of texts, each of which I want to search for the occurence of 
> links to images. From each text I want to extract image filenames that end on 
> one of these strings:
>
> .gif,.jpg,.jpeg,.png,.bmp
>
> Searching a text containing the string
>
> <img src="http://my.domain.com/path/to/images/testimg.gif";>
>
> would give me testimg.gif,
>
> searching a text containing the strings
> <img src="http://my.domain.com/path/to/images/testimg.gif";>
> <img src="http://my.domain.com/path/to/images/testimg.jpg";>
> <img src="http://my.domain.com/path/to/images/testimg.png";>
>
> would give me
>
> testimg.gif,testimg.jpg,testimg.png
>
> I think REFindNoCase is most suitable for this since it's the only CF 
> function that lets me search for multiple occurences of a pattern I know of. 
> I can't get it to match _all_ occurences of the string I'm looking for.
>
> The regular expression I use:
> (<img src ?= ?[""|'][https?://]?[a-zA-Z0-9_\-/\\\.^\.jpg]+\.jpg)\s?(\1)*
>
> I do this:
> REFindNoCase(RE,string,1,"true") where RE is the above regular expression and 
> string is the string containing 3<img>  tags with an .jpg resource.
>
> This gives me an array containing the starting position and the length of the 
> _first_ element in the string that matches with the regular expression. I 
> can't get it to include all matches in the string.
>
> Is my regular expression wrong or is it not possible what I want?
>
> Marc
>
> 

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