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Re: split array and string from string (trust me it will make sense when you read) [message #180814 is a reply to message #180813]

Wed, 20 March 2013 01:21

Christoph Becker
Messages: 91
Registered: June 2012

Karma:

Member

CloudPress wrote:

> I guess the real question is is there anything to be gained by using
> regular expressions. besides cleaner code? Because if this will work
> without any noticeable performance difference compared to regex it might
> just be easier to stick to this.

IMO it's not so much about cleaner code, than about performance. Using
regexp's will shift all the hard work from PHP to C, which is much
faster. Consider the code you've posted: it calls strpos(), substr(),
str_replace() et al. in a loop multiple times; for sure not the fastest
way of doing things.

A quick example, what can be accomplished with a simple regexp:

>>> $str = 'Hello world, [key=value] [key2=value1] This is just a
test. [key=value2]';
>>> echo preg_replace('/\[key[0-9]*=value[0-9]*\]/', '', $str);
Hello world, This is just a test.

To fill the array of key/value pairs, you can start with:

>>> preg_match_all('/\[(key[0-9]*)=(value[0-9]*)\]/', $str, $m);
>>> var_dump($m)

--
Christoph M. Becker

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[Message index]

		split array and string from string (trust me it will make sense when you read) By: cph on Tue, 19 March 2013 04:12
		Re: split array and string from string (trust me it will make sense when you read) By: cph on Tue, 19 March 2013 04:17
		Re: split array and string from string (trust me it will make sense when you read) By: Jerry Stuckle on Tue, 19 March 2013 13:06
		Re: split array and string from string (trust me it will make sense when you read) By: cph on Wed, 20 March 2013 00:34
		Re: split array and string from string (trust me it will make sense when you read) By: Jerry Stuckle on Wed, 20 March 2013 00:45
		Re: split array and string from string (trust me it will make sense when you read) By: cph on Wed, 20 March 2013 00:56
		Re: split array and string from string (trust me it will make sense when you read) By: Christoph Becker on Wed, 20 March 2013 01:21
		Re: split array and string from string (trust me it will make sense when you read) By: Jerry Stuckle on Wed, 20 March 2013 01:43

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