a.html<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD><BODY>
<FORM METHOD=POST ACTION="b.php">
<INPUT TYPE="text" NAME="a">
<INPUT TYPE="text" NAME="b">
<INPUT TYPE="submit" value="submit">
</FORM>
</BODY>b.php
<?php
//$_POST['a']这样就可以取到a的内容了
if(isset($_POST['a'])){
echo $_POST['a'];
}
?>
</HTML>