preg_match

[vishwavivek]

hello,

this is reagrding preg_match() ......

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// to get the host name from URL

preg_match("/^{(http:\/\/)?([\/]+)/i",}
"http://www.php.net/index.html", $matches);

$host = $matches[2];

this is not clear to me ...... i m unable to understand the code from "?"

[url]http://[/url] is fine ... this is trapped by ^(http:\/\/)

but after that, what is use of "?([^\/]+)"

thanks for ur time,

vivek

[wilku]

The question mark is describing the first parenthesis. So decoding your regex would be:
- ^(http:\/\/)? meaning http:// at the beginning of a script(⁾ 0 or 1 time (?)
- ([^\/]+) meaning any character except "/" 1 or more times (+)
Jn other words it will match everything from optional http:// at the beginning to the first "/" after that.

[vishwavivek]

hello,

thanks for the explanations .... now it is clear to me 🙂

vivek