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Converting ereg expressions to preg

I have used this regex in php < v5.3.0 

ereg('^http://www.w3.org/[0-9]{4}/XMLSchema$',$value)

As I updated to php v.5.3.0 I am trying to use preg_match(), but I have hard time creating PCRE regex which is equivalent:

preg_match('/^http\\:\\/\\/www\\.w3\\.org\\/[0-9]{4}\\/XMLSchema$/',$value)

Could someone help on this one?

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azec-pdx
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    Try `preg_match('#^http://www\.w3\.org/[0-9]{4}/XMLSchema$#', $value)`. You can use other non-alphanumerics as the regexp delimiter, not just `/`, and that usually results in more readable expressions. – DCoder Jul 23 '12 at 10:18
  • Hi, thanks for quickness - actually this worked: preg_match('/^http://www\.w3\.org/[0-9]{4}/XMLSchema$/', $value). Does it matter if it starts with # or /? – azec-pdx Jul 23 '12 at 10:39
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    @ZeC: No, it doesn't matter; you can use any symbol – Igor Chubin Jul 23 '12 at 11:01

1 Answers1

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You can you the same expression as in ereg:

preg_match('@^http://www[.]w3[.]org/[0-9]{4}/XMLSchema$@',$value)

Just take @ instead of / as a delimiter. And don't forget to escape dots (. means "any symbol" in a regular expression). You can do this using backslashes but I prefer symbol class [.] for that.

Igor Chubin
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