feedback on difference between javascript and php regular expressions

Question

I have been doing some testing with the differences between JavaScript and PHP regular expressions and "I believe" that the following 2 expressions are pretty much exactly the same thing, but I would like to ask the gurus here to confim this or not before I add these to my production code.

PHP Version

preg_replace('/[^a-zA-Z0-9\.\-\_]/', '_', $str);

JavaScript Version

str.replace(/[^a-zA-Z\d\.\-\_]/g, "_");

Thx,
Dave Keltz

I was speaking of functionality like miniteck pointed out not so much how they were formatted. Thx for the reply tho. — Dave k
– Dave k, Commented Mar 5, 2012 at 4:40
Sorry, I think I was wrong about PHP syntax anyway, so I'll delete my previous comment so it doesn't lead people astray. — nnnnnn
– nnnnnn, Commented Mar 5, 2012 at 4:47

Ry- · Accepted Answer · 2012-03-05 04:26:37Z

1

Yes, they're identical in functionality. Of course, you can shorten both to this:

/[^\w\.-]/

PHP Demo
JavaScript Demo

answered Mar 5, 2012 at 4:26

Ry-♦

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Dave k Over a year ago

Thx, I was pretty sure they were, but I just needed someone else with more knowledge then myself to confirm it. As for shortining things goes I kinda like it the way it is now because it's easier for me to understand if I ever have to not edit it at a later point in time.

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