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  1. #1
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    imagejpeg() function won't output the image

    Ok , so I'm learning how to use the GD library of PHP to generate polls , images , etc .. The thing is that when it comes to the image output using the imagejpeg function, nothing shows on the screen .. I'd really appreciate your help . For this exercise , I am typing text on a HTML forum , which needs to be put on an image using the GD library , basically putting text on an image . It's pretty straight-forward, I just don't understand why my image won't show .. Below is both the HTML form code and the PHP code .

    HTML form.
    Code:
    <html>
    <head> <title> Create Buttons </title> </head>
    <body>
    <form action ="button.php" method ="post">
    <p> Type button text here </p>
    <input type="text" name="button_text" size ="20" />
    <p> Choose button color: </p>
    <input type ="radio" name="color" value="red"> Red <br>
    <input type ="radio" name="color" value="green"> Green <br>
    <input type ="radio" name="color" value="blue"> Blue <br>
    <input type ="submit" value ="Create Button" />
    </form>
    
    </body>
    </html>
    PHP Code:
    <?php
    Header
    ('Content-type: image/jpeg');
    $DOCUMENT_ROOT $_SERVER['DOCUMENT_ROOT'];
    $button_text $_POST['button_text']; var_dump($button_text);
    $color $_POST['color']; var_dump($color);
     if(empty(
    $color) || empty($button_text))
       {
          echo 
    " Could not create image - form not filled correctly";
          exit;
          }
          
    $path $DOCUMENT_ROOT."/uploads/$color-button.jpg";
     
    $im imagecreatefromjpeg ($path);
     
    $width_image imagesx($im);
     
    $height_image imagesy($im);

     
    $width_image_wo_margins $width_image-(2*18);
     
    $height_image_wo_margins $width_image-(2*18);

     
    $font_size 33;
     
    putenv('GDFONTPATH=C:\Windows\Fonts');

     
    $fontname getenv('GDFONTPATH') . '\comic.ttf';
     if(!
    is_file($fontname))
    {
        die( 
    "Missing Font");
    }

     do
      {
        
    $font_size--;
        
    $bbox imagettfbbox($font_size,0,$fontname,$button_text);
        
    $right_text $bbox[2];
        
    $left_text $bbox[0];
        
    $width_text  $right_text -$left_text;
        
    $height_text abs($bbox[7] - $bbox[1]);
        }

        while(
    $font_size && ( $height_text $height_image_wo_margins || $width_text $width_image_wo_margins));

        if ( 
    $height_text $height_image_wo_margins || $width_text $width_image_wo_margins)
           {

          echo 
    "Text given wil not fit on button.<br />";
            }
        else 
        {
           
    $text_y $width_image/2.0 $width_text/2.0;
           
    $text_x $height_image/2.0 $height_text/2.0;

        if(
    $left_text 0)
          {
          
    $text_x += abs($left_text); //add factor for left overhang.  
          
    }
          
    $above_line_text abs($bbox[7]);
          
    $text_y += $above_line_text;
          
    $text_y -=2;
          
    $white imagecolorallocate($im,255,255,255);
          
    imagettftext($im,$font_size,0,$text_x,$text_y,$white,$fontname,$button_text);

          
    imagejpeg($imNULL,75);

         }
      
    imagedestroy($im);
    ?>
    Last edited by Inigoesdr; 12-16-2012 at 06:48 AM.

  • #2
    Senior Coder
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    nothing shows on the screen..
    Do you mean you have an entirely blank screen or just that the image doesn't display? Does View Source for the page reveal anything?

    Please edit your code: the closing tag is [/ CODE] (without the space) and there is a separate button for PHP code-wrapping.
    PHP Code:
    putenv('GDFONTPATH=C:\Windows\Fonts');

    $fontname getenv('GDFONTPATH') . '\comic.ttf'
    You might need to double-escape \\ these, and access to this C-drive location may be an issue (even if just testing it locally). Added: I think you might need to save a font (.ttf) within your domain(?).
    Last edited by AndrewGSW; 12-16-2012 at 04:40 AM.
    "I'm here to save your life. But if I'm going to do that, I'll need total uninanonynymity." Me Myself & Irene.
    Validate your HTML and CSS

  • #3
    Senior Coder
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    Incorrect post deleted.
    "I'm here to save your life. But if I'm going to do that, I'll need total uninanonynymity." Me Myself & Irene.
    Validate your HTML and CSS


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