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如下函数：
<div class="codetitle"><a style="CURSOR: pointer" data="68998" class="copybut" id="copybut68998" onclick="doCopy('code68998')"> 代码如下:<div class="codebody" id="code68998">
<?
/*
获取远程文件内容
@param $url 文件http地址
/
function fopen_url($url)
{
if (function_exists('file_get_contents')) {
$file_content = @file_get_contents($url);
} elseif (ini_get('allow_url_fopen') && ($file = @fopen($url,'rb'))){
$i = 0;
while (!feof($file) && $i++ < 1000) {
$file_content .= strtolower(fread($file,4096));
}
fclose($file);
} elseif (function_exists('curl_init')) {
$curl_handle = curl_init();
curl_setopt($curl_handle,CURLOPT_URL,$url);
curl_setopt($curl_handle,CURLOPT_CONNECTTIMEOUT,2);
curl_setopt($curl_handle,CURLOPT_RETURNTRANSFER,1);
curl_setopt($curl_handle,CURLOPT_FAILONERROR,CURLOPT_USERAGENT,'Trackback Spam Check'); //引用垃圾邮件检查
$file_content = curl_exec($curl_handle);
curl_close($curl_handle);
} else {
$file_content = '';
}
return $file_content;
}
?>
相关解释：
1,ini_get : Returns the value of the configuration option as a string on success,or an empty string on failure(读取 php.ini 配置文件中的值)
2,; Whether to allow the treatment of URLs (like http:// or ftp://) as files.
allow_url_fopen = On(配置文件中的内容)
3,fopen( "rb"): 在操作二进制文件时如果没有指定 'b' 标记，可能会碰到一些奇怪的问题，包括坏掉的图片文件以及关于 rn 字符的奇怪问题。
注意: 为移植性考虑，强烈建议在用 fopen() 打开文件时总是使用 'b' 标记。
注意: 再一次，为移植性考虑，强烈建议你重写那些依赖于 't' 模式的代码使其使用正确的行结束符并改成 'b' 模式。
4,strtolower -- Make a string lowercase
5,curl_init() :curl_init -- Initialize a cURL session(初始化一个cUrl会话)
resource curl_init ( [string url] )
Initializes a new session and return a cURL handle for use with the curl_setopt(),curl_exec(),and curl_close() functions.
url--If provided,the CURLOPT_URL option will be set to its value. You can manually set this using the curl_setopt() function.
Returns a cURL handle on success,FALSE on errors.
6,curl_setopt -- Set an option for a cURL transfer(提供设置)
bool curl_setopt ( resource ch,int option,mixed value )
Sets an option on the given cURL session handle. (具体请看 PHP 手册) There:
CURLOPT_URL ：The URL to fetch. You can also set this when initializing a session with curl_init().
CURLOPT_CONNECTTIMEOUT ：The number of seconds to wait whilst trying to connect. Use 0 to wait indefinitely.(无限期等待 设置为 0)
CURLOPT_RETURNTRANSFER ：TRUE to return the transfer as a string of the return value of curl_exec() instead of outputting it out directly.
CURLOPT_FAILONERROR ：TRUE to fail silently if the HTTP code returned is greater than or equal to 400. The default behavior is to return the page normally,ignoring the code.
CURLOPT_USERAGENT ：The contents of the "User-Agent: " header to be used in a HTTP request.
7,curl_exec : Perform a cURL session,This function should be called after you initialize a cURL session and all the options for the session are set.
如果成功则返回 TRUE，失败则返回 FALSE。 However,if the CURLOPT_RETURNTRANSFER option is set,it will return the result on success,FALSE on failure
8,curl_close -- Close a cURL session下面是一些参考代码:
PHP 采集程序 常用函数
PHP 采集获取指定网址的内容 （编辑：安卓应用网）
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