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Message-ID: <3167694.MM0jWc37uj@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <php@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Sat, 04 Feb 2012 16:05:49 +0100
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Subject: Re: reduce all spaces to one
Newsgroups: comp.lang.php
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Jerry Stuckle wrote:

> On 2/4/2012 9:41 AM, Thomas 'PointedEars' Lahn wrote:
>> John wrote:
>>> Am 03.02.2012 21:19, schrieb M. Strobel:
>>>> Solution shootout:
>>>> strobel@s114-intel:~>   php -a
>>>> Interactive shell
>>>>
>>>> php>   echo str_replace('  ',' ','here   are  some      spaces  ');
>>>> here  are some   spaces
>>>> php>   echo preg_replace('/\s+/', ' ', 'here   are  some      spaces 
>>>> '); here are some spaces
>>>> php>
>>>>
>>>> The regex solution is the winner.
>>> OK.  Thanks to all those who answered !!
>>
>> It should be noted that if your question was understood literally, the
>> solutions presented so far would be wrong.  \s would match too many
>> different characters, as it stands for *white-space* in PCRE, _not_ only
>> the space character.  In order to reduce only all consecutive *space*
>> characters to one space character, you need to write
>>
>>    echo preg_replace('/ +/', ' ', "here   are  some  \n   spaces  ");
>>
>> Note that the newline, which is white-space too, is preserved here.
> 
> Newline is preserved in my version also,

No, it is not.

$ php -a
Interactive mode enabled

<?php

echo "|foo \n bar|";
echo preg_replace('/\s+/', ' ', "|foo \n bar|");     
echo preg_replace('/ +/', ' ', "|foo \n bar|");
|foo 
 bar||foo bar||foo 
 bar|

> if you understood ANYTHING about how PHP's regex's work (but we already
> know you don't). 

Stop talking to the mirror.


PointedEars
-- 
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    navigator.userAgent.indexOf('MSIE 5') != -1
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