PHP small function to replace html content

/**
* Replace html content
* by bbs.it-home.org
*/
function htmlsp($a)
{
 if(strpos($a, '<', 0)=== false)
 {
 echo $a;
 }else
 {
 while(strpos($a, '<', 0)>=0)
 {
 if(strpos($a, '<', 0 )===false)
 break;
 $x1 = strpos($a, '<', 0);
 $x2 = strpos($a, '>', 0 ; $t = substr($a, $x1, $x2 - $x1 + 1);
 $a = str_replace($t,'',$a);
 }
 echo $ a;
 }
 }



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