PHP获取网页标题的3种实现方法代码实例

这篇文章主要介绍了PHP获取网页标题的3种实现方法,分别使用CURL、file()函数、file_get_contents实现,需要的朋友可以参考下
一、推荐方法 CURL获取 
<?php 
$c = curl_init();
 $url = 'www.jb51.net';
 curl_setopt($c, CURLOPT_URL, $url);
 curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
 $data = curl_exec($c);
 curl_close($c);
 $pos = strpos($data,'utf-8');
 if($pos===false){$data = iconv("gbk","utf-8",$data);}
 preg_match("/<title>(.*)<\/title>/i",$data, $title);
 echo $title[1];
 ?>

二、使用file()函数

<?php
 $lines_array = file('http://www.jb51.net/');
 $lines_string = implode('', $lines_array);
 $pos = strpos($lines_string,'utf-8');
 if($pos===false){$lines_string = iconv("gbk","utf-8",$lines_string);}
 eregi("<title>(.*)</title>", $lines_string, $title);
 echo $title[1];
 ?>

三、使用file_get_contents

<?php
 $content=file_get_contents("http://www.jb51.net/");
 $pos = strpos($content,'utf-8');
 if($pos===false){$content = iconv("gbk","utf-8",$content);}
 $postb=strpos($content,'<title>')+7;
 $poste=strpos($content,'</title>');
 $length=$poste-$postb;
 echo substr($content,$postb,$length);
 ?>
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