PHP blank page in Prod server but all OK in local

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I have this script: and when I move it to the remote server a blank page appears, this is the only page on the site that gives this and I don’t understand why. On site everything is ok, no error and if I see the source code of the pag tb appears nothing. All blank

<?php
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);
require_once('conn.php');

spl_autoload_register(function($class) {
    require_once ('Classes/'.$class.'.php');
});

$database = new DB($db);

?>
<!DOCTYPE html>
<html>
    <head>
        <title>Pics Upload</title>
        <style>
        * {
            box-sizing:border-box;
            margin: 0;
        }
        div {
            font-size: 0;
        }
        #errors {
            color: red;
            font-size: 16px;
        }
        p {
            font-size: 13px;
            text-align: center;
            background-color: yellow;
        }
        .image {
            width: 33%;
            font-size: 0;
            display: inline-block;
        }
        .image img {
            width: 100%;
            border: 2px solid yellow;
        }
        </style>
</head>

<body>
<div id ="wrapper">
<h1>Display all images from Database</h1>
<br>
<a href="index.php">Home</a>
<br>
<a href="displayAll.php">Display all images from database</a>
<br>
<a href="mostVoted.php">Display the 3 most voted images</a>
<br>
<a href="imagesFolder.php">Display images from folder</a>
<form action="" method="POST">
    <label><br><br>Insert how many random images you want to see<br><input type="text" name="numRandom"></label><br>
    <input type="submit">
</form>
<?php
    setlocale(LC_ALL, 'pt_BR.utf8', 'Portuguese_Brazil');
    date_default_timezone_set('Europe/Lisbon');

    echo '<br><br>Total Rows (images) in Database: ' .$database->fetchRowCount(). '<br><br>';

    if (isset($_POST['numRandom'])) {
        $numOfRandom = $_POST['numRandom'];
        if ($database->inputRandomCheck($numOfRandom)) {
            $results = $database->selectRandomImage($numOfRandom);

            echo 'Total random images to display: ' .$numOfRandom. '<br><br>';
            echo '<pre>', print_r($results), '</pre>';

            $uppercaseDay = ucfirst(gmstrftime('%A'));

            ?>
            <div id="imgWrapper">
            <?php
            for ($i=0; $i<count($results); $i++) {
                ?>
                <div class="image">
                    <p><?php echo $results[$i]->image_name;
                        echo '<br>' .strftime($uppercaseDay.', %d/%b/%Y - %H:%M:%S', $results[$i]->uploaded); ?>
                    </p>
                    <p>Total votes = <?php echo $results[$i]->vote; ?></p>
                    <a href="<?php echo $results[$i]->link; ?>" target="_blank">
                    <img src="<?php echo $results[$i]->image_path; ?>"></a>
                </div>
            </div>
            <?php }
        }

        else if (!empty($database->errors())){
            foreach ($database->errors() as $error) {
                echo '<div id="errors">' .$error. '</div>';
            }
        }
    }

    else {
        echo 'Total random images to display:<br><br><br>';
    }
?>
</div>
</body>
</html>
php

  • The php version of both servers is the same?

  • Yes, this is the only page on the website where this happens... http://iwanttobesanta.com/picsUpload/ happens on the website of Andom images

  • 2

    The production server is the same operating system and file structure?

  • 4

    Quite pertinent comment from @Marceloaymone. remember that in web PHP is almost always run in environment *Nix that is case-sensitive while the vast majority of PHP programmers, program on Windows that is not. Also, I have never seen pass -1 to error_reporting(). Use one of the described values in the manual

  • I think it’s a problem with the BD connection and the BD class has something like this: or die();

  • 1

    Do you have access to PHP error logs on the remote server? There they are always saved, if the PHP guidelines change at runtime (ini_set()) are not enabled.

  • 1

    Just to say that I was able to solve, without realizing why it seems that in the "Else if (!Empty($database->errors)) {..." part there was some kind of conflict, I only removed the "Else" and left the "if" and it worked

  • @Miguel Which version of php were you using? I think this one question explains the reason for the error. Could the test change the line else if (!empty($database->errors())){ by: $erros = $database->errors();&#xA; else if (!empty($erros)){.

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1 answer

1

The problem may be on this line:

require_once('conn.php');

Or in this:

require_once ('Classes/'.$class.'.php');

You are calling another(s) file(s). What he(s) does(in)?

Something that helps to know where the problem is is to put a echo with something to print before and after the line where you suspect there is an error. For example:

require_once('conn.php');
echo 'Teste';

If you print it, it’s because the error isn’t there.

Another problem may be related to file encoding. If it is encoded with UTF-8, check that the "Include Unicode Signature (GOOD)" option is not checked. If it is, it can cause problems when using commands like header, session_start(), etc... for which there can be no type of printing before them (and the BOM is a printed tag in the generated html).

If after these checks the error is not located, please post the full content (Conn.php file) to help you.

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