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Hi, quite new here. I am having trouble with a form I am submitting for processing. Here is my code.

 

process.php

<?php
require("common.php");

if ($_POST['hdd1pn'] == $_POST['hdd2pn'] && $_POST['hdd2pn'] == $_POST['hdd3pn'] && $_POST['hdd3pn'] == $_POST['hdd4pn'] && $_POST['partnumber'] != NULL && $_POST['ctnumber'] != NULL && $_POST['4sn'] != NULL && $_POST['hdd1pn'] != NULL && $_POST['hdd1sn'] != NULL && $_POST['hdd2sn'] != NULL && $_POST['hdd3sn'] != NULL && $_POST['hdd4sn'] != NULL) {
	
	$check = "SELECT * FROM dmagorders WHERE ctnumber = :ctnumber";
	$check_params = array(":ctnumber" => $_POST['ctnumber']);
	
	try	{
		$stmt = $db->prepare($check);
		$res = $stmt->execute($check_params);
	} catch(PDOException $ex) {
		die("Failed to run query: " . $ex->getMessage());
	}
	
	if($stmt->rowCount() != 0) {
		while( $row = $stmt->fetch()) {
			$foursncheck = $_POST['4sn'];
			$check_sst = "SELECT * FROM mag_res WHERE serialno LIKE '%$foursncheck%'";
			try	{
				$sststmt = $db->prepare($check_sst);
				$sstresult = $sststmt->execute();
			} catch(PDOException $sstex) {
				die("Failed to run query: " . $sstex->getMessage());
			}
			
			if($sststmt->rowCount() != 0) {
				$upd = "UPDATE dmagorders SET hdd1sn = :hdd1sn,  hdd2sn = :hdd2sn,  hdd3sn = :hdd3sn,  hdd4sn = :hdd4sn, stage = :stage, status = :status, lasttouch = :lasttouch, lastupdate = :lastupdate WHERE ctnumber = :ctnumber AND 4sn = :4sn";
				$params = array(
						":ctnumber" => $_POST['ctnumber'],
						":4sn"=> strtoupper(str_pad($_POST['4sn'], 8, "0", STR_PAD_LEFT)),
						":hdd1sn"=> $_POST['hdd1sn'],
						":hdd2sn"=> $_POST['hdd2sn'],
						":hdd3sn"=> $_POST['hdd3sn'],
						":hdd4sn"=> $_POST['hdd4sn'],
						":stage" => "8",
						":status" => "Packed and Shipped",
						":lasttouch" => $_SESSION['user']['fname']." ".$_SESSION['user']['lname'],
						":lastupdate" => date('F d, Y [ h:i:s A O ]'),
				);						
				try	{
					$updstmt = $db->prepare($upd);
					$updres = $updstmt->execute($params);
					header("Location: pack-dmag.php?stat=success");
					exit();
					} catch(PDOException $updex) {
						die("Failed to run query: " . $updex->getMessage());;
				exit();
					}
			} else {
				header("Location: pack-dmag.php?stat=nosstdata");
				exit();
			}
		}
	}
} else {
	header("Location: pack-dmag.php?stat=nodata");
	exit();
}

My problem is that this page is actually working for some forms, however, sometimes, it just shows a blank page and doesn't redirect back to pack-dmag.php. There are also no errors or warning messages. Just a single blank page.

 

Any help is greatly appreciated. I am just still learning PHP. If you have suggestions to optimize my code, it is also greatly appreciated.

 

Link to comment
https://forums.phpfreaks.com/topic/282945-php-post-page-showing-blank-page/
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