PHP blank white page, no errors

Question

I have a PHP page that I developed locally and worked fine. Upon uploading it to a server I now just get a blank white screen? It is the exact same code, works fine locally but doesnt remotely. I have tried setting on error reporting but that still doesn t give me any errors, just a blank white screen.

The code:

    $firstname = $phone = $email = $picture = $sqlcon = "";
    $firstnameErr = $phoneErr = $emailErr = $pictureErr = $sqlErr = $filterErr = "";
    $statusmsg = "";
    $newpicture = $registered = "false";
    
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
    
        // If the user has not entered a firstname and has not entered details previously
        if ((empty($_POST["firstname"])) && empty($_POST["hfirst"])) {
        
            $firstnameErr = "Firstname is required for submission";
        }
        else {
        
            if (!empty($_POST["firstname"])) {
            
                $firstname = $_POST["firstname"];
            }
            else {
            
                $firstname = $_POST["hfirst"];
            }
            
            if (!preg_match("/^[a-zA-Z ]*$/", $firstname)) { 
            
                $firstnameErr="Please ensure you have entered only characters for your first name";
            }
        }
        
        // If the user has not entered a phone number and has not entered details previously
        if ((empty($_POST["phone"])) && (empty($_POST["hphone"]))) {
        
            $phoneErr = "Please ensure you have entered a phone number"; 
        }
        else {
        
            if (!empty($_POST["phone"])) {
            
                $phone = $_POST["phone"];
            }
            else {
            
                $phone = $_POST["hphone"];
            }
            
            if (!is_numeric($phone)) {
                
                $phoneErr = "Please ensure you have entered a valid phone number";
            }
        }
        
        if ((empty($_POST["email"])) && (empty($_POST["hemail"]))) {
        
            $emailErr = "Please ensure you have entered your email address";
        }
        else {
        
            if (!empty($_POST["email"])) {
            
                $email = $_POST["email"];
            }
            else {
            
                $email = $_POST["hemail"];
            }
            
            if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/", $email)) {
            
                $emailErr = "Please ensure you have entered a valid email address";
            }
        }
        
        if ((empty($_FILES["file"]["name"])) && (empty($_POST["hfile"]))) {
        
            $pictureErr = "Please ensure you have selected a picture to upload";
        }
        else {
        
            if (!empty($_FILES["file"]["name"])) {
            
                if ($_FILES["file"]["size"] > 1048576) {
                    
                        $pictureErr = "The maximum size for a picture is 1mb";
                }
                else {
                    
                    // Ensure the user has selected a file of accepted type
                    $temp = explode(".", $_FILES["file"]["name"]);
                    $ext = end($temp);
                    $allowedExt = array ("gif", "JPEG", "jpg", "png", "JPG");
                        
                    if (!in_array($ext, $allowedExt)) {
                        
                        $pictureErr = "Please ensure you have uploaded an image file";                              
                            
                    }
                }
                
                $newpicture = "true";
                $picture = $_FILES["file"]["name"];
                
            }
            else {

                $picture = $_POST["hpicture"];
            }
        }
        
        $sqlcon = mysqli_connect("localhost", "USER", "PASS", "personneldb");
        
        if (mysqli_connect_errno()) {
                    
            $sqlErr = "Could not connect to database";
            mysqli_close($sqlcon);
        }
        
        if ($newpicture == "true") {
        
            if (!move_uploaded_file($_FILES["file"]["tmp_name"], "./upload/".$_FILES["file"]["name"])) {
                
                $pictureErr = "File could not be uploaded";
            }
        }
        
        if ((empty($firstnameErr)) && (empty($emailErr)) && (empty($phoneErr)) && (empty($pictureErr == "")) && (empty($sqlErr == ""))) {
        
            mysqli_query($sqlcon, "INSERT INTO test2Details(Firstname, Phone, Email, ImageName)
            VALUES ('$firstname', '$phone', '$email', '$picture')");
                    
            // Display status message
            $statusmsg = "Success! Your details and picture have been uploaded and stored"; 
            

        }
        
        if ((!empty($firstname)) && (!empty($phone)) && (!empty($email)) && (!empty($picture))) {
        
            $registered = "true";
        }
        else {
        
            $registered = "false";
        }
        
        
    }
    

Answer 1

This will enable showing errors in your server, but remember, isn't recommended to use this in production and not in a PHP file, these configuration must be setted in php.ini

ini_set('display_startup_errors',1); 
ini_set('display_errors',1);
error_reporting(-1);

For further information you can see:

• http://php.net/manual/en/function.error-reporting.php
• http://php.net/manual/en/errorfunc.configuration.php#ini.display-startup-errors
• http://php.net/manual/en/errorfunc.configuration.php#ini.display-errors