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Escaping a plus sign (+)

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Nov 22.2009

How does one escape a plus sign in PHP, or rather get it to work in the following script:

[code=php]
$who = preg_replace(‘/%20/’, ‘ ‘, $who);
$who = preg_replace(‘/-/’, ‘ ‘, $who);
$who = preg_replace(‘/+/’, ‘ ‘, $who);
[/code]

The first two expressions work fine, the last is crashing, so there must be a problem with the + being executed instead of parsed as text the way I want… I’ve tried a backslash to no effect… (I’m not very good at PHP ? )

I’m trying to capture an URL which includes plus signs:
http:// [url]www.URL[/url] . com/file.php?dog+cat+mouse

I’m stripping out the dog+cat+mouse and then stripping the plus signs, replacing them with spaces.

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PHP

5 Comments(s) ↴

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@NogDogNov 22.2009 — You could use urldecode() on the string (it should take care of the "+" and any "%xx" characters), then apply any other changes you need to the result.
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@donatelloauthorNov 22.2009 — You could use urldecode() on the string (it should take care of the "+" and any "%xx" characters), then apply any other changes you need to the result.[/QUOTE]

Thanks!

It works like a charm:
[code=php]
$who = urldecode($who);
$who = preg_replace('/-/', ' ', $who);
[/code]
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@thraddashNov 22.2009 — You should really be using the [B]str_replace[/B] function instead, as it seems you don't need a regular expression to do the match.

[code=php]$who = str_replace('-', ' ', $who);[/code]
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@donatelloauthorNov 22.2009 — You should really be using the [B]str_replace[/B] function instead, as it seems you don't need a regular expression to do the match.

[code=php]$who = str_replace('-', ' ', $who);[/code][/QUOTE]

Thanks for the tip, done!<P>

Maybe one of these days I'll know what I'm doing in PHP... ?

Can anyone explain why? I'm curious to know...

is preg_replace more taxing on Apache?

is preg_replace being deprecated?

or is it just good programming?

Thanks!
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@criterion9Nov 22.2009 — str_replace has less overhead and is less taxing on the processor especially when you are just replacing a single character. More complicated replaces/searches can justify the extra overhead of the ereg/preg functions.
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