php教程|php手册

foreach,substr,explode,fopen,curl_setopt,request

php教程-php手册

有时我们需要做一些采集需要下载远程网页源码到本来了，在这里我们整理了一些php获取远程网页源码代码，希望对各位会有所帮助。

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php的curl函数

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基本例子

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php fopen函数

<?phpprint ("

HTTP

n");// open a file using http protocolif (!($myFile = fopen("/", "r"))) { print ("file could not be opened"); exit;}while (!feof($myFile)) { // read a line from the file $myLine = fgetss($myFile, 255); print ("$myLine

n");}// close the filefclose($myFile);print ("

FTP

n");print ("n");// open a file using ftp protocolif (!($myFile = fopen("ftp:///welcome.msg", "r"))) { print ("file could not be opened"); exit;}while (!feof($myFile)) { // read a line from the file $myLine = fgetss($myFile, 255); print ("$myLine

n");}// close the filefclose($myFile);print ("

Local

n");print ("n");// open a local fileif (!($myFile = fopen("data.txt", "r"))) { print ("file could not be opened"); exit;}while (!feof($myFile)) { // read a line from the file $myLine = fgetss($myFile, 255); print ("$myLine

n");}// close the filefclose($myFile);?>

file_get_contents函数

抓取远程网页源码类

_url; $pos = strpos($req, ://); $this->_protocol = strtolower(substr($req, 0, $pos)); $req = substr($req, $pos + 3); $pos = strpos($req, /); if ($pos === false) $pos = strlen($req); $host = substr($req, 0, $pos); if (strpos($host, :) !== false) { list($this->_host, $this->_port) = explode(:, $host); } else { $this->_host = $host; $this->_port = ($this->_protocol == https) ? 443 : 80; } $this->_uri = substr($req, $pos); if ($this->_uri == \) $this->_uri = /; } // constructor function HTTPRequest($url) { $this->_url = $url; $this->_scan_url(); } // download URL to string function DownloadToString() { $crlf = "rn"; // generate request $req = GET . $this->_uri . HTTP/1.0 . $crlf . Host: . $this->_host . $crlf . $crlf; // fetch $this->_fp = fsockopen(($this->_protocol == https ? ssl:// : \) . $this->_host, $this->_port); fwrite($this->_fp, $req); while (is_resource($this->_fp) && $this->_fp && !feof($this->_fp)) $response.= fread($this->_fp, 1024); fclose($this->_fp); // split header and body $pos = strpos($response, $crlf . $crlf); if ($pos === false) return ($response); $header = substr($response, 0, $pos); $body = substr($response, $pos + 2 * strlen($crlf)); // parse headers $headers = array(); $lines = explode($crlf, $header); foreach ($lines as $line) if (($pos = strpos($line, :)) !== false) $headers[strtolower(trim(substr($line, 0, $pos))) ] = trim(substr($line, $pos + 1)); // redirection? if (isset($headers[location])) { $http = new HTTPRequest($headers[location]); return ($http->DownloadToString($http)); } else { return ($body); } }}//使用方法$r = new HTTPRequest(\);$str = $r->DownloadToString();?>