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Get rid of extra spaces using PHP's preg_replace

Right there in the examples for the php function preg_replace was how to strip whitespace from a string:

$str = preg_replace('/\s\s+/', ' ', $str);

Ereg replace looks prettier:

$string = trim(ereg_replace(' +', ' ', $string));

However, Agaric has read in several places that preg_replace tends to be faster.


Searched words: 
preg replace multiple spaces with one strip white space remove extra blank spaces with Perl RegEx


Be aware, however, that

Be aware, however, that ereg_replace is depreciated and is eliminated in php6:

Better to use preg_replace for forward-compatibility.

Why not use

Why not use trim(preg_replace('/\s\s+/', ' ', $str)); ??? (at least, to be comparable to the ereg statement)

you got it bit wrong

the proper formula is
$str = preg_replace('/\s+/', ' ', $str);

the \s in your '\s\s+/' is unnecessary - \s+ allready says "one or more" and in your version, you will not replace single space-chars e.g. tabs and other non-space characters matched with \s with your standard ' ', what you probably do not want

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