조건으로 페이지넘기는데 안넘어가네요 채택완료

</p><p><?
$a = "<a href="<a href="http://www.abc.com&a=1" target="_blank" rel="noopener noreferrer">http://www.abc.com&a=1</a>"><a href="http://www.abc.com&a=1" target="_blank" rel="noopener noreferrer">http://www.abc.com&a=1</a></a>";</p><p>$b = strpos($a, "a=1");</p><p style="margin-left: 0px;">if($b){ 
?>
<script>
   location.replace("<a href="<a href="http://www.naver.com" target="_blank" rel="noopener noreferrer">http://www.naver.com</a>"><a href="http://www.naver.com" target="_blank" rel="noopener noreferrer">http://www.naver.com</a></a>");
</script>
<?
} else {
?>
<script>
   location.replace("<a href="<a href="http://www.google.com" target="_blank" rel="noopener noreferrer">http://www.google.com</a>"><a href="http://www.google.com" target="_blank" rel="noopener noreferrer">http://www.google.com</a></a>");
</script>
<?
}
?>​</p><p>