How can the regex expression "/^(http:\/\/)?([^\/]+)/i" be modified to cut off everything after the slash in a URL?

To modify the regex expression "/^(http:\/\/)?([^\/]+)/i" to cut off everything after the slash in a URL, you can simply add a slash (/) at the end of the regex pattern to match the first slash encountered in the URL. This will ensure that only the part of the URL before the first slash is captured. 

$url = "http://www.example.com/page1/page2";
preg_match("/^(http:\/\/)?([^\/]+)/i", $url, $matches);
$trimmedUrl = $matches[0];
echo $trimmedUrl;

Keywords

regex modification URL slash cut off

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