issue in student data updation - php

Question

I have a table of student details. and i have two csv files,these files contains updated information of existing students and new students data.if data not in student table which means the student left the school.
update new details for existing students
If student left school update status the to zero
If new student,then add as new row(with details from both csv)
Below is my code but in this second file information not getting updated.
i am attaching my code.if anybody have simple solution,please suggest
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "student";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
if (isset($_POST['submit'])) {
$sql = "SELECT * FROM e_student";
$result_main = $conn->query($sql);
$filea = $_FILES['filea'];
$ext = pathinfo($_FILES['filea']['name'], PATHINFO_EXTENSION);
if ($ext == "csv" && $_FILES["filea"]["error"] == 0) {
$target = "upload/" . $_FILES["filea"]["name"];
move_uploaded_file($_FILES["filea"]["tmp_name"], $target);
if (($handle = fopen($target, "r")) !== FALSE) {
$array = $fields = array();
$i = 0;
while (($row = fgetcsv($handle, 4096)) !== false) {
if (empty($fields)) {
$fields = $row;
continue;
}
foreach ($row as $k => $value) {
$array[$i][$fields[$k]] = $value;
}
$i++;
}
fclose($handle);
}
}
$ext1 = pathinfo($_FILES['fileb']['name'], PATHINFO_EXTENSION);
if ($ext1 == "csv" && $_FILES["fileb"]["error"] == 0) {
$target1 = "upload/" . $_FILES["fileb"]["name"];
move_uploaded_file($_FILES["fileb"]["tmp_name"], $target1);
if (($handle = fopen($target1, "r")) !== FALSE) {
$array1 = $fields1 = array();
$j = 0;
while (($row1 = fgetcsv($handle, 4096)) !== false) {
if (empty($fields1)) {
$fields1 = $row1;
continue;
}
foreach ($row1 as $k => $value) {
$array1[$j][$fields1[$k]] = $value;
}
$j++;
}
fclose($handle);
}
}
foreach ($result_main as $rel) {
$clk = 'no';
foreach ($array as $arr) {
if(isset($arr1['SCD']))
{
if (strcmp(trim($rel['objId']), trim($arr['BCEID'])) == 0) {
$clk = 'yes';
$name = $arr['FirstName'];
$conditn = $rel['objId'];
$last_name = $arr['LegalSurname'];
$year_level = $arr['YearLevelName'];
$email = $arr['BCEEmail'];
$username = $arr['BCELogin'];
$StEnrollmentStatus = 1;
$sql1 = "UPDATE e_student SET Name = '$name',Lastname='$last_name',stYearLevel='$year_level',email='$email',username='$username' WHERE objId ='$conditn'";
$result = $conn->query($sql1);
if($result)
{
updateparent($rel['objId'], $array1,$conn);
}
}
}
}
if ($clk == 'no') {
$conditn = $rel['objId'];
$status = 0;
$pastoral = "Not Currently Enrolled";
$sql1 = "UPDATE e_student SET stEnrollmentStatus = '$status',stPastoral='$pastoral' WHERE objId ='$conditn'";
$result = $conn->query($sql1);
}
}
foreach ($array as $ar1) {
foreach ($result_main as $rel1) {
if (strcmp(trim($ar1['BCEID']), trim($rel1['objId'])) != 0) {
$name = $ar1['FirstName'];
$last_name = $ar1['LegalSurname'];
$year_level = $ar1['YearLevelName'];
$email = $ar1['BCEEmail'];
$objid = $ar1['BCEID'];
$username = $ar1['BCELogin'];
$StEnrollmentStatus = 1;
$sql3 = "INSERT INTO e_student(Name,Lastname,stYearLevel,email,objId,username,stEnrollmentStatus) VALUES('$name','$last_name','$year_level','$email','$objid','$username','$StEnrollmentStatus')";
$result1 = $conn->query($sql3);
if($result1)
{
updateparent1($objid, $array1,$conn);
}
}
}
}
echo "<h3><center>SUCCESSFULLY UPDATED</center></h3>";
}
function updateparent($objid, $array1,$conn) {
foreach ($array1 as $arr1) {
if(isset($arr1['SCD']))
{
if (strcmp(trim($objid), trim($arr1['SCD'])) == 0) {
$parent = $arr1['PTI1'] . $arr1['PFN1'] . $arr1['PSN1'];
echo $parent;
$email = $arr1['PEM1'];
}
$sql2 = "UPDATE e_student SET stParentName = '$parent',stParentEmail='$email' WHERE objId ='$objid'";
$result = $conn->query($sql2);
}
}
}
function updateparent1($objid, $array1,$conn) {
foreach ($array1 as $arr1) {
if(isset($arr1['SCD']))
{
echo $arr1['SCD'];
if (strcmp(trim($objid), trim($arr1['SCD'])) == 0) {
$parent = $arr1['PTI1'] . $arr1['PFN1'] . $arr1['PSN1'];
$email = $arr1['PEM1'];
}
$sql2 = "UPDATE e_student SET stParentName = '$parent',stParentEmail='$email' WHERE objId ='$objid'";
$result = $conn->query($sql2);
}
}
}
?>