PHP check valid url

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PHP check valid url

Added by tamos on May-22-2007, 5:12 pm

A simple php function that uses regex to determine if a given string is a valid url or not.

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function valid_url($str)
{
	return ( ! preg_match('/^(http|https|ftp):\/\/([A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+):?(\d+)?\/?/i', $str)) ? FALSE : TRUE;
}

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