getting introducer code based on the employee code - php

Question

I want to get the introducer5 code for the employee code from that introducer5 code need to get the introducer4 code who introduce introducer4 like wise i want to get all their codes.
I have 7 levels of employee: 1) xxxx-7000
2) yyyy-6000
3)....
7) eeee -1000
<?php
if(isset($_POST['submit'])){
$introducer_code=$_POST['intro_code'];
function getOneLevel($intro_code)
{
$get_intro_code="SELECT * FROM `emp_details` WHERE `emp_code` = '".$intro_code."' ";
// echo $get_intro_code."</br>";
$exe_code=mysql_query($get_intro_code);
//$introducer_code=array();
$rows=mysql_num_rows($exe_code);
// echo $rows;
if($rows>0)
{
$get_role=mysql_fetch_array($exe_code);
$introducer_code= $get_role['intro_code'];
$compare_role1=" SELECT * FROM emp_details WHERE `emp_code` = '".$introducer_code."' ";
// echo $compare_role1."</br>";
$exe_role1=mysql_query($compare_role1);
$get_pos1=mysql_fetch_array($exe_role1);
//echo $get_pos1['emp_role'];
if($row_c=mysql_num_rows($exe_role1) > 0){
$compare_role="SELECT * FROM user_role WHERE `emp_role_id` = '".$get_pos1['emp_role']."' ";
echo $compare_role."</br>";
$exe_role=mysql_query($compare_role);
$get_pos=mysql_fetch_array($exe_role);
$id=$get_pos['id'];
}
}
$res=$id.','.$introducer_code;
echo $res."</br>";
return $res;
}
$compare_role2="SELECT * FROM emp_details WHERE `intro_code` = '".$introducer_code."'";
// echo $compare_role2 ."</br>";
$exe_role2=mysql_query($compare_role2);
if (mysql_num_rows($exe_role2)>0) {
//$n=7;
while ($get_pos=mysql_fetch_array($exe_role2)) {
//echo $get_pos['emp_code'];
// $c=$n-$id;
/* for($i=0;$i<$c;$i++){
echo "hi";*/
getOneLevel($get_pos['emp_code']);
// }
}
}
getOneLevel($introducer_code);
}
?>
<form method="post">
<div class="form-group">
<label>Introducer Code</label>
<input type="text" placeholder="Enter Introducer Code" id="intro_code" required="required" name="intro_code" class="form-control" />
</div>
<button value="Submit" type="submit" name="submit" >Submit</button>
</form>
The above code only returns the immediate introducer4 code for the value entered in the text box.It does not returning the introducer3 code who refers introducer4 and so on...
Please Help!!
Struggling more than 4 days!!

Answer 1

Try this may be useful
function getIntroducer($intro_code)
{
//Write your code to get introudcer and return it's Interducer id only
return $introudcer;
}
$finalInterducer = $intro_code //start
for($i=0;$i<5;$i++){ // If its 7 loop 7 time's
$finalInterducer = getIntroducer($finalInterducer)
}
//After loop you get last finalInterducer

Answer 2

Change the SQL Query, try this:
SELECT ED4.emp_code AS 'introducer4',
ED3.emp_code AS 'introducer3',
ED2.emp_code AS 'introducer2',
ED1.emp_code AS 'introducer1'
FROM emp_details ED1,emp_details ED2,emp_details ED3,emp_details ED4
WHERE ED4.emp_code = '".$introducer_code."'
AND ED3.emp_code = ED4.intro_code
AND ED2.emp_code = ED3.intro_code
AND ED1.emp_code = ED2.intro_code
All the best :)