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I'm new to regular expressions and came accros the following \d+ . I do not exactly know what this means, please point me in the right direction.

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Very good introduction: regular-expressions.info/tutorial.html –  Felix Kling May 15 '10 at 19:57

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\d is a digit (a character in the range 0-9), and + means 1 or more times. So, \d+ is 1 or more digits.

This is about as simple as regular expressions get. You should try reading up on regular expressions a little bit more. Google has a lot of results for regular expression tutorial, for instance. Or you could try using a tool like the free Regex Coach that will let you enter a regular expression and sample text, then indicate what (if anything) matches the regex.

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But the ` \ ` is for escaping? am I right? thank you in advance –  whiteletters in blankpapers Aug 10 at 3:18

\d is called a character class and will match digits. It is equal to [0-9].

+ matches 1 or more occurrences of the character before.

So \d+ means match 1 or more digits.

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\d is a digit, + is 1 or more, so a sequence of 1 or more digits

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\d means 'digit'. + means, '1 or more times'. So \d+ means one or more digit. It will match 12 and 1.

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