PHP content keyword replacement function sharing

/**
* Content keyword replacement
* by bbs.it-home.org
*/
$arr=array(
"shoes"=>"Shoes",
"Socks"=>"Socks",
"Skirt"=> ;"skirt",
"dress"=>"dress",
);
$str="shoes socks shoes socks shoes socks shoes socks skirt dress";
$str=replacelink($str,$arr,3);
echo $str;
 public function replacelink($str,$arr,$maxcount=3000){
//Match the picture
preg_match_all("/(]*>)/iUs",$str,$imgs) ;
preg_match_all("/(.*)/iUs",$str,$links);
//Replace pictures and links
if($links[1]){
foreach($links[1] as $k=>$v){
$str=str_replace($v,"@links_$k",$str);
}
}
if($imgs[1] ){
foreach($imgs[1] as $k=>$v){
$str=str_replace($v,"@imgs_$k",$str);
}
}
//End of matching
 $str=strtr($str,$arr);
preg_match_all("/(.*)/iUs",$str,$a);
$a=$a [1];
$c=array_count_values($a);
if($c){
$kk=0;
foreach($c as $k=>$v){
if($v){
 if($kk<$maxcount){
$v=$v-1;
}
$str=preg_replace("/".$this->replace_quote($k)."/i",str_replace("# ","",strip_tags($k)),$str,$v);
}
$kk++;
}
}
//Restore pictures and links
if($links[1]){
foreach($ links[1] as $k=>$v){
$str=str_replace("@links_$k",$v,$str);
}
}
if($imgs[1]){
foreach ($imgs[1] as $k=>$v){
$str=str_replace("@imgs_$k",$v,$str);
}
}
return $str;
}
function replace_quote($str){
$str=preg_quote($str);
$str=str_replace("/","/",$str);
return $str;
}< ;/p>