php自写函数代码获取关键字去超链接_php技巧

function getkey($contents){ 
$rows = strip_tags($contents); 
$arr = array(' ',' ',"\s", "\r\n", "\n", "\r", "\t", ">", "“", "”"); 
$qc_rows = str_replace($arr, '', $rows); 
if(strlen($qc_rows)>2400){ 
$qc_rows = substr($qc_rows, '0', '2400'); 
} 
$data = @implode('', file("http://keyword.discuz.com/related_kw.html?title=$contents&ics=gbk&ocs=gbk")); 
preg_match_all("/(.*)A\[(.*)\]\](.*)><\/kw>/",$data, $out, PREG_SET_ORDER); 
for($i=0;$i<5;$i++){ 
$key=$key.$out[$i][2]; 
if($out[$i][2])$key=$key.","; 
} 
return $key; 
} 
//$contents为你要得到关键字的文章 
 

2.去掉文章中的超链接简单，简洁 

 代码如下:

function get_new_content($content){ 
include("../simple_html_dom.php"); 
$html = str_get_html($content); 
$a_href = $html->find('a'); 
foreach($a_href as $link){ 
$text = $link->plaintext;//链接中的文字; 
$link->outertext = $text; 
} 
$now_content = $html->save(); 
} 
//preg_replace("/(.*?)<\/a>/i","\${1}", $content); 这样用正则也可以