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                        at September 23, 2009 15:57 by paulgrenwood
                            
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if (!preg_match("/^(http|ftp):/", $_POST['url'])) {
   $_POST['url'] = 'http://'.$_POST['url'];
}
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Some times you need to accept some url as input but users seldom add http:// to it, this code will add http:// to the URL if it’s not there.
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Prepend http to a URL
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http, php, link
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PHP