php读取⽂件内容的⼏种⽅法详解⽰例代码1: ⽤file_get_contents 以get⽅式获取内容
复制代码代码如下:
<?php
$url='www.baidu/';
$html=file_get_contents($url);
//print_r($http_response_header);
ec($html);
printhr();
printarr($http_response_header);
printhr();
>
⽰例代码2: ⽤fopen打开url, 以get⽅式获取内容
复制代码代码如下:
<?
$fp=fopen($url,'r');
printarr(stream_get_meta_data($fp));
printhr();
while(!feof($fp)){
$result.=fgets($fp,1024);
}
echo"url body:$result";
printhr();
fclose($fp);
>
⽰例代码3：⽤file_get_contents函数，以post⽅式获取url
复制代码代码如下:
<?php
$data=array('foo'=>'bar');
$data=http_build_query($data);
$opts=array(
'http'=>array(
'method'=>'POST',
'header'=>"Content-type: application/x-www-form-urlencoded\r\n".
"Content-Length: ".strlen($data)."\r\n",
'content'=>$data
),
);
$context=stream_context_create($opts);
$html=file_get_contents('localhost/e/admin/test.html',false,$context);
echo$html;
>
⽰例代码4：⽤fsockopen函数打开url，以get⽅式获取完整的数据，包括header和body
复制代码代码如下:
<?
functionget_url($url,$cookie=false){
$url=parse_url($url);
$query=$url[path]."?".$url[query];
ec("Query:".$query);
$fp=fsockopen($url[host],$url[port]?$url[port]:80,$errno,$errstr,30);
if(!$fp){
$request="GET$queryHTTP/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,$request);
while(!@feof($fp)){
$result.=@fgets($fp,1024);
}
fclose($fp);
return$result;
}
}
//获取url的html部分，去掉header
functionGetUrlHTML($url,$cookie=false){
$rowdata=get_url($url,$cookie);
if($rowdata)
{
$body=stristr($rowdata,"\r\n\r\n");
$body=substr($body,4,strlen($body));
return$body;
}
returnfalse;
}
>
⽰例代码5：⽤fsockopen函数打开url，以POST⽅式获取完整的数据，包括header和body 复制代码代码如下:
<?
functionHTTP_Post($URL,$data,$cookie,$referrer=""){
// parsing the given URL
$URL_Info=parse_url($URL);
// Building referrer
if($referrer=="")// if not given use this script. as referrer
$referrer="111";
// making string from $data
foreach($dataas$key=>$value)
$values[]="$key=".urlencode($value);
$data_string=implode("&",$values);
// Find out which port is needed - if not given use standard (=80)
if(!isset($URL_Info["port"]))
$URL_Info["port"]=80;
// building POST-request:
$request.="POST ".$URL_Info["path"]." HTTP/1.1\n";
$request.="Host: ".$URL_Info["host"]."\n";
$request.="Referer:$referer\n";
$request.="Content-type: application/x-www-form-urlencoded\n";
$request.="Content-length: ".strlen($data_string)."\n";
$request.="Connection: close\n";
$request.="Cookie:$cookie\n";
$request.="\n";
$request.=$data_string."\n";
$fp=fsockopen($URL_Info["host"],$URL_Info["port"]);
fputs($fp,$request);
while(!feof($fp)){
$result.=fgets($fp,1024);
}
fclose($fp);
return$result;
>
⽰例代码6：使⽤curl库，使⽤curl库之前，你可能需要查看⼀下php.ini，查看是否已经打开了curl扩展
复制代码代码如下:
<?
$ch = curl_init();
$timeout = 5;
curl_setopt ($ch, CURLOPT_URL, 'www.baidu/');
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
echo $file_contents;
>
关于curl库：
curl官⽅⽹站curl.haxx.se/
curl 是使⽤URL语法的传送⽂件⼯具，⽀持FTP、FTPS、HTTP HTPPS SCP SFTP TFTP TELNET DICT FILE和LDAP。curl ⽀持SSL证书、HTTP POST、HTTP PUT 、FTP 上传，kerberos、基于HTT格式的上传、代理、cookie、⽤户＋⼝令证明、⽂件传送恢复、http代理通道和⼤量其他有⽤的技巧
复制代码代码如下:
<?
functionprintarr(array$arr)
{
echo"<br> Row field count: ".count($arr)."<br>";
foreach($arras$key=>$value)
{
echo"$key=$value <br>";
}
}
>
======================================================
PHP抓取远程⽹站数据的代码
现在可能还有很多程序爱好者都会遇到同样的疑问，就是要如何像搜索引擎那样去抓取别⼈⽹站的HTML代码，然后把代码收集整理成为⾃⼰有⽤的数据!今天就等我介绍⼀些简单例⼦吧.
Ⅰ.抓取远程⽹页标题的例⼦:
以下是代码⽚段：
复制代码代码如下:
<?php
/*
+-------------------------------------------------------------
+抓取⽹页标题的代码，直接拷贝本代码⽚段，另存为.php⽂件执⾏即可.
+-------------------------------------------------------------
*/
error_reporting(7);
$file = fopen ("www.dnsing/", "r");
if (!$file) {
echo "<font color=red>Unable to open remote file.</font>\n";
exit;
}
while (!feof ($file)) {
$line = fgets ($file, 1024);
if (eregi ("<title>(.*)</title>", $line, $out)) {
$title = $out[1];
echo "".$title."";
break;
}
fclose($file);
//End
>
Ⅱ.抓取远程⽹页HTML代码的例⼦:
以下是代码⽚段：
复制代码代码如下:
<? php
/*
+----------------
+DNSing Sprider
+----------------
*/
$fp = fsockopen("www.dnsing", 80, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br/>\n";
} else {
$out = "GET / HTTP/1.1\r\n";
$out .= "Host:www.dnsing\r\n";
$out .= "Connection: Close \r\n\r\n";
fputs($fp, $out);
while (!feof($fp)) {
echo fgets($fp, 128);
}
fclose($fp);
}
//End
>
以上两个代码⽚段都直接Copy回去运⾏就知道效果了，上⾯的例⼦只是抓取⽹页数据的雏形，要使其更适合⾃⼰的使⽤，情况有各异.所以，在此各位程序爱好者⾃⼰好好研究⼀下吧.
===============================
稍微有点意义的函数是：get_content_by_socket(), get_url(), get_content_url(), get_content_object ⼏个函数，也许能够给你点什么想法。
复制代码代码如下:
<?php
如何查看html代码
//获取所有内容url保存到⽂件
function get_index($save_file, $prefix="index_"){
$count = 68;
$i = 1;
if (file_exists($save_file)) @unlink($save_file);
$fp = fopen($save_file, "a+") or die("Open ". $save_file ." failed");
while($i<$count){
$url = $prefix . $i .".htm";
echo "Get ". $url ."...";
$url_str = get_content_url(get_url($url));
echo " OK\n";
fwrite($fp, $url_str);
++$i;
}
fclose($fp);
}
//获取⽬标多媒体对象
function get_object($url_file, $save_file, $split="|--:**:--|"){
if (!file_exists($url_file)) die($url_file ." not exist");
$file_arr = file($url_file);
if (!is_array($file_arr) || empty($file_arr)) die($url_file ." not content");
$url_arr = array_unique($file_arr);
$fp = fopen($save_file, "a+") or die("Open save file ". $save_file ." failed");
foreach($url_arr as $url){
if (empty($url)) continue;
echo "Get ". $url ."...";
$html_str = get_url($url);
echo $html_str;
echo $url;
exit;
$obj_str = get_content_object($html_str);
echo " OK\n";
fwrite($fp, $obj_str);
}
fclose($fp);
}
//遍历⽬录获取⽂件内容
function get_dir($save_file, $dir){
$dp = opendir($dir);
if (file_exists($save_file)) @unlink($save_file);
$fp = fopen($save_file, "a+") or die("Open save file ". $save_file ." failed");
while(($file = readdir($dp)) != false){
if ($file!="." && $file!=".."){
echo "Read file ". $file ."...";
$file_content = file_get_contents($dir . $file);
$obj_str = get_content_object($file_content);
echo " OK\n";
fwrite($fp, $obj_str);
}
}
fclose($fp);
}
//获取指定url内容
function get_url($url){
$reg = '/^http:\/\/[^\/].+$/';
if (!preg_match($reg, $url)) die($url ." invalid");
$fp = fopen($url, "r") or die("Open url: ". $url ." failed.");
while($fc = fread($fp, 8192)){
$content .= $fc;
}
fclose($fp);
if (empty($content)){
die("Get url: ". $url ." content failed.");
}
return $content;
}
//使⽤socket获取指定⽹页
function get_content_by_socket($url, $host){
$fp = fsockopen($host, 80) or die("Open ". $url ." failed");
$header = "GET /".$url ." HTTP/1.1\r\n";
$header .= "Accept: */*\r\n";
$header .= "Accept-Language: zh-cn\r\n";
$header .= "Accept-Encoding: gzip, deflate\r\n";
$header .= "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; InfoPath.1; .NET CLR 2.0.50727)\r\n";
$header .= "Host: ". $host ."\r\n";
$header .= "Connection: Keep-Alive\r\n";
//$header .= "Cookie: cnzz02=2; rtime=1; ltime=1148456424859; cnzz_eid=56601755-\r\n\r\n";
$header .= "Connection: Close\r\n\r\n";
fwrite($fp, $header);
while (!feof($fp)) {
$contents .= fgets($fp, 8192);
}

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