Question

I don’t know where I’ve got a mistake, when I fire below code from http://localhost/image.php?application=first everything is OK.

session_start();
$name = $_GET['application'];   

$text = rand(10000,99999); 
$_SESSION['application'][$name] = $text;

$height = 25; 
$width = 65; 
$image_p = imagecreate($width, $height); 
$black = imagecolorallocate($image_p, 0, 0, 0); 
$white = imagecolorallocate($image_p, 255, 255, 255); 
$font_size = 14; 

imagestring($image_p, $font_size, 5, 5, $text, $white); 
imagejpeg($image_p, null, 80);

but when I changed code for this

if (isset($_GET['application']) && !empty($_GET['application'])) {
    if (isset($_GET['image']) && $_GET['image'] == 'get'){
    session_start();
    $name = $_GET['application'];   

    $text = rand(10000,99999); 
    $_SESSION['application'][$name] = $text;

    $height = 25; 
    $width = 65; 
    $image_p = imagecreate($width, $height); 
    $black = imagecolorallocate($image_p, 0, 0, 0); 
    $white = imagecolorallocate($image_p, 255, 255, 255); 
    $font_size = 14;
    imagestring($image_p, $font_size, 5, 5, $text, $white); 

    imagejpeg($image_p, null, 80);
}
}

then I get RAW format in browser, so I add

header('Content-type: image/jpeg'); 
imagejpeg($image_p, null, 80);

to the code, and now I’ve get message, that my picture is interrupted, but when I save it on drive and launch from IrfanView it opens normally.

I would like to add that I was testing ob_start() function, but it didn’t change anything.

Answer 1

ok I figure it out. the problem was that I add require 'common.php' before main IF statment. My whole code were like this

<?php
require 'common.php';
    if (isset($_GET['application']) && !empty($_GET['application'])) {
    if (isset($_GET['image']) && $_GET['image'] == 'get'){
        session_start();
        $name = $_GET['application'];                   $text = rand(10000,99999);             $_SESSION['application'][$name] = $text;
            $height = 25;             $width = 65;             $image_p = imagecreate($width, $height);             $black = imagecolorallocate($image_p, 0, 0, 0);             $white = imagecolorallocate($image_p, 255, 255, 255);             $font_size = 14;
        imagestring($image_p, $font_size, 5, 5, $text, $white);                 header('Content-type: image/jpeg');
        imagejpeg($image_p, null, 80);
    }
.
.
.

so when i moved require to other place everythig works great!
Thanks mates for help! 🙂