A relatively comprehensive interception function (mostly used for analysis of collected content)

/*
Collection and interception function, mainly used to analyze the collected content
getcon - remove html characters and spaces after interception
getcon2 - simple interception, directly return the interception content.
Parameters:
$par accepts two formats:
1. Characters before {DATA} and characters after
2. Regular expression
*/
function getcon($pat,$str) {
 $title_var=explode("{DATA}",$pat);
 if(count($title_var)>1){
 $title_1=explode($title_var[0],$str);
 $title_2= explode($title_var[1],$title_1[1]);
 return strip_s(strip_tags($title_2[0]));
 }else{
 preg_match_all($pat,$str,$res);
 return strip_s( strip_tags($res[1][0]));
 }
 }

function getcon2($pat,$str){
 $title_var=explode ("{DATA}",$pat);
 if(count( $title_var)>1){
 $title_1=explode($title_var[0],$str);
 $title_2=explode($title_var[1],$title_1[1]);
 return $title_2[0] ;
 }else{
 preg_match_all($pat,$str,$res);
 return $res[1][0];
 }
 }

function strip_s($str){
 $str = preg_replace ("/ (s+)/", ' ', $str);
 $str = str_replace(chr(13),'',$str);
 $str = str_replace(chr(10),'',$ str);
 $str = ltrim($str);
 $str = trim($str);
 return $str;
 }
 ?>