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Re: Extracting multiple matches from a string using preg_replace [message #178586 is a reply to message #178583]

Mon, 09 July 2012 18:58

jwcarlton
Messages: 76
Registered: December 2010

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On Monday, July 9, 2012 8:44:06 AM UTC-4, Captain Paralytic wrote:
> Well I'm very confused by all this. First of all, why are you using
> preg_replace to extract the vidid? I would have thought that a job
> better suited to preg_match.

Probably just a lack of knowledge on my part. I thought that preg_match was used to find if the regex was true or false, and then preg_replace would be used to replace whatever.

From Peter's reply, I don't think that either of them are the right command.. But for the sake of my own learning, how would I have modified my script (catching only one) to use preg_match instead of preg_replace?

And, if preg_replace works, then what's the advantage? Speed?

> Next, in your string assigned to $this_comment, the first vidid is
> different to the other 2, so why are you expecting $this_id to match
> all of them?

No, that was the point; they're not going to match, so I need to modify the script to replace ALL of the existing links with the ID that's in that link.

That's why I turned to you guys. My only thought was to put the script in a function, then use a while() loop to keep running the function until there were no more links. I couldn't get it to work, though, and I didn't like the idea of using a loop on it, anyway, so I thought you guys might have a better suggestion.

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[Message index]

		Extracting multiple matches from a string using preg_replace By: jwcarlton on Mon, 09 July 2012 08:50
		Re: Extracting multiple matches from a string using preg_replace By: Captain Paralytic on Mon, 09 July 2012 12:44
		Re: Extracting multiple matches from a string using preg_replace By: jwcarlton on Mon, 09 July 2012 18:58
		Re: Extracting multiple matches from a string using preg_replace By: Peter H. Coffin on Mon, 09 July 2012 13:29
		Re: Extracting multiple matches from a string using preg_replace By: jwcarlton on Mon, 09 July 2012 19:00
		Re: Extracting multiple matches from a string using preg_replace By: jwcarlton on Tue, 10 July 2012 09:08

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