How does PHP access URLs? PHP Access URL method Summary (code)

This article introduces you to how PHP accesses URLs? PHP Access URL method Summary (code), there is a certain reference value, the need for friends can refer to, I hope to help you.

1, Fopen Way

Accesses the specified URL function access_url ($url) {        if ($url = = ") return false;       $fp = fopen ($url, ' r ') or exit (' Open URL faild! ');        if ($fp) {while       (!feof ($fp)) {            $file. = Fgets ($fp). "";        }        Fclose ($FP);         }       return $file;    }

2, file_get_contents mode (open remote files will cause the CPU to soar. File_get_contents can actually post)

Get Url$data = Array (' foo ' = ' bar ') by post, $data = Http_build_query ($data), $opts [' http '] = Array (  ' method ' => ; ' POST ',  ' header ' = ' content-type:application/x-www-form-urlencodedrn '.  " Content-length: ". Strlen ($data). "RN",  ' content ' = $data); $context = Stream_context_create ($opts); $html = file_get_contents (' http://localhost /test.html ', false, $context); Echo $html;

3. Curl Mode

function Curl_file_get_contents ($durl) {      $ch = Curl_init ();      curl_setopt ($ch, Curlopt_url, $durl);      curl_setopt ($ch, Curlopt_returntransfer, true); Get Data return        curl_setopt ($ch, Curlopt_binarytransfer, true);//Get Data back when Curlopt_returntransfer is enabled        $data = Curl_ EXEC ($ch);      Curl_close ($ch);      return $data;  }

4, Fsockopen Way (can only obtain the website homepage information, other pages can not)

 $fp = Fsockopen ("www.example.com", $errno, $errstr, 30); (! $fp)     {echo "$errstr ($errno) <br/>\n";        }else {$out = "get/http/1.1\r\n";        $out. = "host:www.example.com\r\n";        $out. = "connection:close\r\n\r\n";        Fwrite ($fp, $out);        while (!feof ($fp)) {echo fgets ($fp, 128);     } fclose ($FP); }