Make $_POST a global variable

AP81

Is there a way to make $_POST global?, e.g.

<?
$serial_no = $_POST["serial"];
?>

....
<div id="div2" align="center" class="divstyle_blue">
	<form name="form1" method="post" action="<?php echo $PHP_SELF;?>" style="margin-top:1.75%">
  	<div align="center"><label>Serial No:</label>
    	<input name="serial" type="text" maxlength="15">
      <input type="submit" name="submit" value="search" class="altButtonFormat">
   	</div>
  </form>
</div>
...

The problem I am having is that I have links on the page which repost,.e.g

"<tr><th><a href=\"$PHP_SELF?ORDER='WHO'&sort=$sort\">WHO</a></th>\n";
  	echo "<th><a href=\"$PHP_SELF?ORDER='DATE'&sort=$sort\">DATE</a></th>\n";
  	echo "<th><a href=\"$PHP_SELF?ORDER='TYPE'&sort=$sort\">TYPE</a></th>\n";
		echo "<th><a href=\"$PHP_SELF?ORDER='SERIAL_NO'&sort=$sort\">PROBLEM</a></th>\n";
		echo "<th><a href=\"$PHP_SELF?ORDER='REPLACING'&sort=$sort\">NEW</a></th>\n";
  	echo "<th><a href=\"$PHP_SELF?ORDER='ACTION'&sort=$sort\">ACTION</a></th>\n";
		echo "<th><a href=\"$PHP_SELF?ORDER='TO_SITE'&sort=$sort\">SITE</a></th>\n";
  	echo "<th><a href=\"$PHP_SELF?ORDER='NOTES'&sort=$sort\">NOTE</a></th>\n";

As a result of reposting, the variable $serial_no is then empty and cannot be used for my SQL query.

Any ideas?

Rodney_H_

Well, it is a super global array already. However, if you want to save the value and pass it to other pages, you could assign its value to a session var, set a cookie, or pass it in the query string.

Also, you are using $PHP_SELF, but i think you mean to write it as: $_SERVER['PHP_SELF']

AP81

Worked it out.

Changed

<?
$serial_no = $_POST["serial"];
?>

$serial_no = $_REQUEST["serial"]; and changed my links to include &$serial=$serial_no