The problem of cannot pass ?= value in php pagination - php

Question

I have do a pagination with php&html,the problem is my $page is always equal 1 even I click another page and the url is already become ?page=2.The value $p cannot pass as $page.How can I solve this?
<ul class="nospace clear" style="width:1310px;">
<?php
if(isset($_GET['page'])&& $_GET['page']!=""){$page = $_GET["page"];}else{$page=1;}
$current=$page;
$end=12;
if($page=1){$start=0;$previous=$page;$next=$page+1;}
else if($page<=12){$start=$page*12-12;$previous=$page-1;$next=$page+1;}
else{$start=0;$previous=$page-1;$next=12;}
$sql = "Select * from item where Gender='women' AND Category='cloth' LIMIT $start,$end";
$result = mysqli_query($connect,$sql);
while($row=mysqli_fetch_assoc($result)){?>
<img src="../images/demo/<?php echo $row["Pic"]; ?>" style="width:300px;height:280px"><br><p></p><h3><strong><?php echo $row["Name"]; ?></strong></h3><p><?php echo $row["Description"]; ?></p></li>
<?php } ?></ul><figcaption>Page <?php echo"$page ";?> end...</figcaption>
</figure>
</div>
<nav class="pagination">
<ul>
<li>« Previous</li>
<?php
for ($p=1;$p<13;$p++){
if ($page == $p) {?>
<li class="current btn1"><strong><?php echo $p ?></strong></li><?php }
else{?><li><a href="?page=<?php echo $p ?>" class='btn1'><?php echo $p ?></a></li><?php }}?>
<li> Next » </li>
</ul>