Code that PHP detects if the URL address and HTTP address format are valid

/** DESC: Check network address format is valid link:bbs.it-home.org Date:2013/2/24 */ function Checkurl ($weburl) { Return!ereg ("^http (s) *://[_a-za-z0-9-]+ (. [ _a-za-z0-9-]+) *$ ", $weburl); }?> Copy Code 2. Determine if the HTTP address is valid /** DESC: Detect If HTTP address is valid link:bbs.it-home.org Date:2013/2/24 */ function Url_exists ($url) { $ch = Curl_init (); curl_setopt ($ch, Curlopt_url, $url); curl_setopt ($ch, curlopt_nobody, 1); Do not download curl_setopt ($ch, Curlopt_failonerror, 1); curl_setopt ($ch, Curlopt_returntransfer, 1); Return (Curl_exec ($ch)!==false)? True:false; } Method 2 function Img_exists ($url) { Return file_get_contents ($url, 0,null,0,1)? True:false; } Method 3: function Url_exists ($url) { $head = @get_headers ($url); Return Is_array ($head)? True:false; }?> Copy Code Invocation Example: $url = ' http://bbs.it-home.org '; echo url_exists ($url); ?> Copy Code

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