Replacing first three words

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February 18th, 2012, 11:19 AM

seamoon

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Other - Replacing first three words

Hi I want to replace first three "Next" words to "Previous" as I shown below, I tried some tools but I couldn't what regexes should I use to do this?

Code:

					<li style="margin-right: 20px;">
								<a href="4.html" title="Next">
	<img src="../thumbs/4.JPG" alt="Next" />
	<h2>Next</h2>
	<div class="clear"></div>
</a>

					</li>
					<li style="margin-left: 20px;">
								<a href="6.html" title="Next">
	<img src="../thumbs/6.JPG" alt="Next" />
	<h2>Next</h2>

to this:

Code:

						<li style="margin-right: 20px;">
								<a href="4.html" title="Previous">
	<img src="../thumbs/4.JPG" alt="Previous" />
	<h2>Previous</h2>
	<div class="clear"></div>
</a>

					</li>
					<li style="margin-left: 20px;">
								<a href="6.html" title="Next">
	<img src="../thumbs/6.JPG" alt="Next" />
	<h2>Next</h2>

February 18th, 2012, 01:44 PM

ragax

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Join Date: Dec 2011

Location: Nelson, NZ

Posts: 93

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Hi again Seamoon!

Please don't cross-post

I replied on the other post as the context made it clear that you are using php.

For reference for this board:

Search:

Code:

(?s)^(?>.*?\b\K(Next))\b(?>(.*?)\b(Next))\b(.*?)\bNext\b

Replace:

Code:

Previous\2Previous\4Previous

Wishing you a fun weekend.

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February 18th, 2012, 02:43 PM

seamoon

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Hi ragax, I get this error message:

Regular Expression Syntax Error
Unknown regex token \K. Use backslashes to escape metacharacters

P.S.
Ok, no cross-posting.

February 18th, 2012, 03:11 PM

ragax

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Location: Nelson, NZ

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Code:

Unknown regex token \K.

\K only works since php 5.2.4, maybe you have an older version?

Here is a version without \K. Note that both the Search and the Replace have changed.

Search:

Code:

(?s)^(?>(.*?)\b(Next))\b(?>(.*?)\b(Next))\b(.*?)\bNext\b

Replace:

Code:

\1Previous\3Previous\5Previous

Let me know if you run into more problems.

February 18th, 2012, 03:22 PM

seamoon

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I'm using powergrep for replace operation. This time all nexts replaced by previous.

Code:

								<img src="../thumbs/5.JPG" alt="Previous" />
	<h2>Previous</h2>
	<div class="clear"></div>
</a>

					</li>
					<li style="margin-left: 20px;">
								<a href="7.html" title="Previous">
	<img src="../thumbs/7.JPG" alt="Previous" />
	<h2>Previous</h2>
	<div class="clear"></div>

February 18th, 2012, 04:06 PM

ragax

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Join Date: Dec 2011

Location: Nelson, NZ

Posts: 93

Time spent in forums: 1 Day 24 m 37 sec
Reputation Power: 92

Not a PG expert, when I tried it I found the interface impossible to understand. (I have a much easier time with ABA Replace.) But that's my own limitation, I probably just need to study the manual. Anyhow...

In the PHP example on the other post, I gave preg_replace a 1 for the fourth parameter, meaning make one replacement. The same is probably possible in PG.

In the meantime, this is heavier but it should work.

Search:

Code:

(?s)\A(?>((?:(?!Next).)*)\b(Next))\b(?>((?:(?!Next).)*)\b(Next))\b((?:(?!Next).)*)\bNext\b

Replace:

Code:

\1Previous\3Previous\5Previous

Let me know if this solves it.

Last edited by ragax : February 18th, 2012 at 04:57 PM. Reason: performance tweak

February 18th, 2012, 04:29 PM

seamoon

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Yep, it worked great and saved me editing several hundreds of pages. Thanks thousands for your help and patience ragax!

February 18th, 2012, 04:43 PM

ragax

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Join Date: Dec 2011

Location: Nelson, NZ

Posts: 93

Time spent in forums: 1 Day 24 m 37 sec
Reputation Power: 92

It's a pleasure, seamoon, glad it worked.
Please don't hesitate to ask if other questions arise.

Other - Replacing first three words

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