啥也不说了。直接上代码了。主要是用来检查路径文件是否存在：
class Headers
{
static private $headers;
static private $getmodes = array('fsock','curl');
static private $getmode;
static private $type;
public static function init ($type = 'status'){
self::$type = strToLower( $type );
}
public static function get ( $url ,$mode='')
{
list( $host, $uri , $url ) = self::initURL($url);
if($mode && in_array( strToLower( $mode ), self::$getmodes )){
self::$getmode = $mode;
}
return self::_get( $host , $uri ,$url);
}
private static function initURL ( $url )
{
$urls = parse_url( $url );
return array($urls['host'],$urls['path'],$url);
}
private static function _get ( $host , $uri,$url )
{
if(self::$getmode == 'curl' && function_exists( 'curl_init' )){
return self::_curlopen($host,$uri,$url);
}else{
return self::_fsockopen($host,$uri);
}
}
private static function _curlopen ($host,$uri,$url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url );
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_HTTPGET, 1);
curl_setopt($ch,CURLOPT_NOBODY,1);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_TIMEOUT, 60);
$result = curl_exec($ch);
// echo '<pre>';
// print_r( curl_getinfo($ch) );
// echo '</pre>';
curl_close($ch);
if(self::$type == 'status'){
return subStr( $result, 0 , strPos( $result, "" ) );
}
return array_filter(explode( "", $result ));
}
private static function _fsockopen ($host,$uri)
{
$headers = array();
$header=$errno=$errstr='';
$fp = fsockopen ($host, 80, $errno, $errstr, 60);
if ($fp){
fputs ($fp, "GET $uri HTTP/1.0");
if(self::$type == 'status' ){
$get=fgetss( $fp );
return trim( $get );
}else{
while (!feof($fp)){
$char = fgetc($fp);
if($char === "\n"){
if (ord($header) === 13){
return $headers;
}else{
array_push($headers, trim($header));
}
$header = '';
}else{
$header = $header.$char;
}
}
}
fclose ($fp);
}
}
}
$s = microtime(1);
$get = Headers::get('http://www.neatstudio.com/testtt.php','curl');
echo '<pre>';
print_r( $get );
echo '</pre>';
echo( sprintf( "%0.6f" , (microtime(1)-$s) ) );
curl函数中我有一段是注释掉的。如果只是为了取状态，直接运行完后curl_getinfo就OK了。然后取其中的http_code，就可以知道当前的状态。
当然。http_code的具体对应可以参考常用http code
【后记】看到BOPO的回复，才发现。。。郁闷，原来get_headers就可以了。我居然忘了这个函数。傻掉了我。唉。。。。不过这也是从PHP5才开始有的函数。看来我对手册的了解度下降了
