merge two related page together PHP

i have two page. first one give information about user and second one sends them to database table.

i wonder if i can put all codes in just one page because of i have too many page and some times and i should search for find my pages. here is two pages that are related together:

submit_job.php:

   <fieldset class="fdex" >
        <legend><span class="style4">تعیین شغل</span></legend>


        <?php

   $db_host = 'localhost';
   $db_name= 'site';
   $db_table= 'job_list';
   $db_user = 'root';
   $db_pass = '';


 $con = mysql_connect($db_host,$db_user,$db_pass) or die("خطا در اتصال به پايگاه داده");

 mysql_query("SET NAMES 'utf8'", $con);
 mysql_query("SET CHARACTER SET 'utf8'", $con);
 mysql_query("SET character_set_connection = 'utf8'", $con);

 $selected=mysql_select_db($db_name, $con) or die("خطا در انتخاب پايگاه داده");
 mysql_query("SET CHARACTER SET  utf8");
 $dbresult=mysql_query("SELECT * FROM  $db_table",$con);
 echo "توانمندی مورد نظر خود را انتخاب نمایید: ";?><br/>
 <form name="form2" method="post" action="send.php" accept-charset='UTF-8'>

 <?php
 echo '<select name="job">';
 ?>
 $user_id=<?= $fgmembersite->UserFullname(); ?>

 <?php

 while($amch=mysql_fetch_assoc($dbresult))
 {
 echo '<option value="'.$amch['job_id'].'">'.$amch['job_name'].'</option>';
 }
 echo '</select>'; 
 ?><br/>

 <textarea name="textaria" cols="" rows=""></textarea>
          <input name="submit" type="submit" value="submit" />

and also second page contents:

 <?php
 $user_id =$fgmembersite->UserID(); ?>
<?php 
 echo "$user_id ";
 ?>



 <?php
 $db_host = 'localhost';
 $db_name= 'site';
 $db_table= 'relation';
 $db_user = 'root';
 $db_pass = '';


  $con = mysql_connect($db_host,$db_user,$db_pass) or die("خطا در اتصال به پايگاه داده");

  mysql_query("SET NAMES 'utf8'", $con);
  mysql_query("SET CHARACTER SET 'utf8'", $con);
  mysql_query("SET character_set_connection = 'utf8'", $con);

  $selected=mysql_select_db($db_name, $con) or die("خطا در انتخاب پايگاه داده");
   $ins = "INSERT INTO $db_table (job_id,user_id,comments) VALUES ('" . mysql_escape_string($_POST['job']) . "','$user_id ', '" . mysql_escape_string($_POST['textaria']) . "')";
 $saved=mysql_query($ins );
 mysql_close($con); 
 echo "('" . mysql_escape_string($_POST['job']) . "')";
 ?>

i just want a way to merge these pages in only one page. it is better than have too many pages.