MySQL "LOAD DATA INFILE " Empty data processing - php

Question

I am using the below php script and can't figure out why it is not working. I do get the echo that it processed with no errors in terminal, but the table remains empty. Is there something incorrect with the code causing this. I confirmed it is locating the file in the directory as well. Hopefully something simple is missing.
<?php
try {
$inputfile1 = '////MainDirectory/SubDiretory/data.csv';
$table1 = 'database.testTable1';
$time1 = microtime(true);
require_once("configFile.php"); //this changes the below as now this is the reference point
$mysql_host = DB_HOST;
$mysql_database = DB_NAME;
$mysql_username = DB_USER;
$mysql_password = DB_PASS;
$db = new PDO("mysql:host=$mysql_host; dbname=$mysql_database", $mysql_username, $mysql_password);
// set the PDO error mode to exception
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$db->exec("SET CHARACTER SET utf8"); // Sets encoding UTF-8
} catch (Exception $e) {
die("Unable to connect: " . $e->getMessage());
}
try {
// Return errors
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// Begin transaction
$db->beginTransaction();
if(file_exists($inputfile1)) {
$Found = 'found';
// Query D2 Load Temp table
$tempA2 = $db->prepare("LOAD DATA INFILE :inputfile1
INTO TABLE $table1
FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '\"'
LINES TERMINATED BY '\r\n'
IGNORE 1 LINES
(column1, column2, column3);");
$tempA2->bindParam(':inputfile1', $inputfile1);
$tempA2 -> execute();
}
} catch (Exception $e) {
// If transaction fail, use checkpoint and rollback
$db->rollBack();
echo "Conversion failed: " . $e->getMessage().'<br />';
file_put_contents('PDOErrors.txt', $e->getMessage(), FILE_APPEND);
}
//time of script
//sleep(1);
$timeC = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];
echo "Full Process Time: {$timeC} $Found";
?>
CSV format:
"HeaderData1","HeaderData2","HeaderData3","HeaderData4","HeaderData5"
"DataA","DataB","DataC"
"Data2","Data2","Data2"
MySQL table format
id INT PK with AI and NN
column1 Varchar
column2 Varchar
column3 Varchar
Thank you for any help