用逗号替换逗号后跟空格 [英] Replace commas followed by spaces with commas

问题描述

如何用逗号(",")替换所有逗号后跟空格(", ")?

How can I replace all commas followed by spaces (", ") with just commas (",")?

当空格前面没有逗号(" ")时，我不想替换空格.

I don't want to replace spaces when they don't have a comma in front of them (" ").

推荐答案

所有str_replace解决方案都可以使用.如果要替换逗号前后的所有空格

All the str_replace solutions will work. If you want to replace all whitespaces before and after the commas

$str = 'cat,  dog , cow,       horse   ,mouse,moose';

$pattern = '/\s*,\s*/';
$replace = ',';
$str = preg_replace($pattern, $replace, $str);

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