PHP function to read the link of a certain site_PHP tutorial

​ Principle: Read the source file of a certain site, then use regular expressions to analyze its source code, and get all the links
/**********qiushuiwuhen(2002-5-20)*************/
if(empty($url))$url = "http://www.csdn.net/expert/";//Set url
$site=substr($url,0,strpos($url,"/",8));//Site
$base=substr($url,0,strrpos($url,"/")+1);//The directory where the file is located
$fp = fopen($url, "r" );//Open url
while(!feof($fp))$contents.=fread($fp,1024);//
$pattern="|href=['"]?([^ '"]+)['" ]|U";
preg_match_all($pattern,$contents, $regArr, PREG_SET_ORDER);//Match all href=
for($i=0;$iif(!eregi("://",$regArr[$i][1]))//Whether it is a relative path, that is, whether there is still ://
if(substr($regArr[$i][1],0,1)=="/")//Is it the root directory of the site
echo "link".($i+1).":".$site.$regArr[$i][1]."
";//Root directory
else
echo "link".($i+1).":".$base.$regArr[$i][1]."
";//Current directory
else
echo "link".($i+1).":".$regArr[$i][1]."
";//relative path
}
fclose($fp);
?> ($regarr);$i++){>

http://www.bkjia.com/PHPjc/445603.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445603.htmlTechArticlePrinciple: Read the source file of a site, then use regular expressions to analyze its source code and get all links/** ********qiushuiwuhen(2002-5-20)*************/ if(empty($url))$url = http://www.csdn.ne...