php php用一个空格替换多个空格
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php Replacing multiple spaces with a single space
提问by Dani
I'm trying to replace multiple spaces with a single space. When I use ereg_replace, I get an error about it being deprecated.
我正在尝试用一个空格替换多个空格。当我使用 时ereg_replace，我收到一个关于它被弃用的错误。
ereg_replace("[ \t\n\r]+", " ", $string);
Is there an identical replacement for it. I need to replace multiple " "white spaces and multiple nbspwhite spaces with a single white space.
是否有相同的替代品。我需要用一个" "空格替换多个空格和多个nbsp空格。
回答by cletus
Use preg_replace()and instead of [ \t\n\r]use \s:
使用preg_replace()和代替[ \t\n\r]使用\s：
$output = preg_replace('!\s+!', ' ', $input);
From Regular Expression Basic Syntax Reference:
\d, \w and \s
Shorthand character classes matching digits, word characters (letters, digits, and underscores), and whitespace (spaces, tabs, and line breaks). Can be used inside and outside character classes.
\d、\w 和 \s
匹配数字、单词字符（字母、数字和下划线）和空格（空格、制表符和换行符）的速记字符类。可以在字符类内部和外部使用。
回答by Somnath Muluk
$output = preg_replace('/\s+/', ' ',$input);
\s is shorthand for [ \t\n\r]. Multiple spaces will be replaced with single space.
\s 是 的简写[ \t\n\r]。多个空格将替换为单个空格。
回答by ghostdog74
preg_replace("/[[:blank:]]+/"," ",$input)
