Re: expression between vertical bars
| From: | Richard Lynch | Date: | Mon, 09 May 2005 02:01:17 +0000 |
| Subject: | Re: expression between vertical bars | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-214734@lists.php.net to get a copy of this message | ||
On Fri, May 6, 2005 12:25 pm, Jan said:
> Could someone explain to me the use of the vertical bar in
> expressions like "|<[^>]+>(.*)</[^>]+>|U". I understand that the
> vertical bars are used to separate the expression from the modifier,
> but can't find any documentation about the reasons and rules to do
> this.
The rule is that the first character, whatever it is, is THE character to
mark beginning and end of the expression.
The following are all the SAME:
"|<[^>]+>(.*)</[^>]+>|U"
"?<[^>]+>(.*)</[^>]+>?U"
"X<[^>]+>(.*)</[^>]+>XU"
/ is a common character to use, but he needed / in his expression, so he
picked | instead.
http://php.net/pcre
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