1. 程式人生 > >PHP讀取頁面內容的四種方法

PHP讀取頁面內容的四種方法

方法1: 用file_get_contents 以get方式獲取內容

$url='http://www.domain.com/?para=123';
$html = file_get_contents($url);
echo $html;

用時:10個頁面 (4-5 s)

header("Content-type:text/html;charset=utf-8");
//程式執行時間
$starttime = explode(' ',microtime());
​
/*········以下是程式碼區·········*/
for ($i=1;$i<11;$i++) {
    $url='http://xiangmu.1637.com/p'.$i.'.html';
    $html = file_get_contents($url);
}
/*········以上是程式碼區·········*/
​
//程式執行時間
$endtime = explode(' ',microtime());
$thistime = $endtime[0]+$endtime[1]-($starttime[0]+$starttime[1]);
$thistime = round($thistime,3);
echo "本網頁執行耗時:".$thistime." 秒。";

方法2: 用fopen開啟url, 以get方式獲取內容

$fp = fopen($url, 'r');
$header = stream_get_meta_data($fp);//獲取報頭資訊
while(!feof($fp)) {
    $result .= fgets($fp, 1024);
}
echo "url header: {$header} <br>";
echo "url body: $result";
fclose($fp);

用時:10個頁面 (4-5 s)

header("Content-type:text/html;charset=utf-8");
//程式執行時間
$starttime = explode(' ',microtime());
​
/*········以下是程式碼區·········*/
for ($i=1;$i<11;$i++) {
    $url='http://xiangmu.1637.com/p'.$i.'.html';
    $fp = fopen($url, 'r');
    $header = stream_get_meta_data($fp);//獲取報頭資訊
    while(!feof($fp)) {
        $result .= fgets($fp, 1024);
    }
    //echo $result;
    fclose($fp);
}
/*········以上是程式碼區·········*/
​
//程式執行時間
$endtime = explode(' ',microtime());
$thistime = $endtime[0]+$endtime[1]-($starttime[0]+$starttime[1]);
$thistime = round($thistime,3);
echo "本網頁執行耗時:".$thistime." 秒。";

方法3:用fsockopen函式開啟url,以get方式獲取完整的資料,包括header和body

$url='http://xiangmu.1637.com/p1.html';
    echo get_url($url);
    function get_url ($url,$cookie=false)
    {
        $url = parse_url($url);
        $query = $url[path]."?".$url[query];
        echo "Query:".$query;
        $fp = fsockopen( $url[host], $url[port]?$url[port]:80 , $errno, $errstr, 30);
        if (!$fp) {
            return false;
        } else {
            $request = "GET $query HTTP/1.1\r\n";
            $request .= "Host: $url[host]\r\n";
            $request .= "Connection: Close\r\n";
            if($cookie) $request.="Cookie:   $cookie\n";
            $request.="\r\n";
            fwrite($fp,$request);
            while(
[email protected]
($fp)) {                $result .= @fgets($fp, 1024);           }            fclose($fp);            return $result;       }   }    //獲取url的html部分,去掉header    function GetUrlHTML($url,$cookie=false)   {        $rowdata = get_url($url,$cookie);        if($rowdata)       {            $body= stristr($rowdata,"\r\n\r\n");            $body=substr($body,4,strlen($body));            return $body;       } ​        return false;   }

用時:10個頁面 (3-6 s)

header("Content-type:text/html;charset=utf-8");
//程式執行時間
$starttime = explode(' ',microtime());
/*········以下是程式碼區·········*/
function get_url ($url,$cookie=false)
{
    $url = parse_url($url);
    $query = $url[path]."?".$url[query];
    $fp = fsockopen( $url[host], $url[port]?$url[port]:80 , $errno, $errstr, 30);
    if (!$fp) {
        return false;
    } else {
        $request = "GET $query HTTP/1.1\r\n";
        $request .= "Host: $url[host]\r\n";
        $request .= "Connection: Close\r\n";
        $request.="\r\n";
        fwrite($fp,$request);
        while([email protected]($fp)) {
            $result .= @fgets($fp, 1024);
        }
        fclose($fp);
        return $result;
    }
}
//獲取url的html部分,去掉header
function GetUrlHTML($url,$cookie=false)
{
    $rowdata = get_url($url,$cookie);
    if($rowdata)
    {
        $body= stristr($rowdata,"\r\n\r\n");
        $body=substr($body,4,strlen($body));
        return $body;
    }
​
    return false;
}
for ($i=1;$i<11;$i++) {
    $url='http://xiangmu.1637.com/p'.$i.'.html';
    //$url='http://xiangmu.1637.com/p1.html';
    get_url($url);
}
/*········以上是程式碼區·········*/
​
//程式執行時間
$endtime = explode(' ',microtime());
$thistime = $endtime[0]+$endtime[1]-($starttime[0]+$starttime[1]);
$thistime = round($thistime,3);
echo "本網頁執行耗時:".$thistime." 秒。";

方法4:使用curl庫,使用curl庫之前,可能需要檢視一下php.ini是否已經打開了curl擴充套件

$url='http://xiangmu.1637.com/p1.html';
$ch = curl_init();
$timeout = 5;
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
echo $file_contents;

用時:10個頁面 (3-6 s)

header("Content-type:text/html;charset=utf-8");
//程式執行時間
$starttime = explode(' ',microtime());
/*········以下是程式碼區·········*/
for ($i=1;$i<11;$i++) {
    $url='http://xiangmu.1637.com/p'.$i.'.html';
    //$url='http://xiangmu.1637.com/p1.html';
$ch = curl_init();
$timeout = 5;
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
​
}
/*········以上是程式碼區·········*/
​
//程式執行時間
$endtime = explode(' ',microtime());
$thistime = $endtime[0]+$endtime[1]-($starttime[0]+$starttime[1]);
$thistime = round($thistime,3);
echo "本網頁執行耗時:".$thistime." 秒。";

總結:這四種方法在速度上並沒有什麼卵子區別。。。。