问题
I\'m trying to replace multiple spaces with a single space. When I use ereg_replace, I get an error about it being deprecated.
ereg_replace(\"[ \\t\\n\\r]+\", \" \", $string);
Is there an identical replacement for it. I need to replace multiple \" \" white spaces and multiple nbsp white spaces with a single white space.
回答1:
Use preg_replace() and instead of [ \t\n\r] use \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.
回答2:
$output = preg_replace('/\s+/', ' ',$input);
\s is shorthand for [ \t\n\r]. Multiple spaces will be replaced with single space.
回答3:
preg_replace("/[[:blank:]]+/"," ",$input)
来源：https://stackoverflow.com/questions/2368539/php-replacing-multiple-spaces-with-a-single-space