duannian7116 2011-06-15 15:50
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替换多个换行符,制表符和空格

I want to replace multiple newline characters with one newline character, and multiple spaces with a single space.

I tried preg_replace("/ +/", " ", $text); and failed!

I also do this job on the $text for formatting.

$text = wordwrap($text, 120, '<br/>', true);
$text = nl2br($text);

$text is a large text taken from user for BLOG, and for a better formatting I use wordwrap.

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  • doumingchen3628 2011-06-15 15:57
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    In theory, you regular expression does work, but the problem is that not all operating system and browsers send only at the end of string. Many will also send a .

    Try:

    I've simplified this one:

    preg_replace("/(?
    ){2,}/", "
    
    ", $text);
    

    And to address the problem of some sending only:

    preg_replace("/[
    ]{2,}/", "
    
    ", $text);
    

    Based on your update:

    // Replace multiple (one ore more) line breaks with a single one.
    $text = preg_replace("/[
    ]+/", "
    ", $text);
    
    $text = wordwrap($text,120, '<br/>', true);
    $text = nl2br($text);
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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