What's the cross-platform regex to replace a line ending?

I've got a string like "foo\nbar", but depending on platform, that could become "开发者_StackOverflow社区foo\n\rbar", or whatever. I want to replace new lines with ", ". Is there a nice (php) regex that'll do that for me?

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Try the regular expression (?:\r\n|[\r\n]):

preg_replace('/(?:\r\n|[\r\n])/', ', ', $str)

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You dont want to use a Regex for a simple replacement like this. Regular string replacement functions are usually much faster. For the line break, you can use the OS aware constant PHP_EOL, e.g.

str_replace(PHP_EOL, ', ', $someString);

On Windows, this will replace \r\n. On Mac \r and on all other systems \n.

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Wouldn't str_replace(array("\n", "\r"), "", $string) work?