Create Image Placeholder with Php ( Placehold.it Clone Script )

Placehold.it is a quick and simple image placeholder service. Here in this post you will learn how it works Or how to achieve the same functionality with php.

Idea

If you are Designing a website and Need a placeholder graphics, you simply have to put the image size after url like - http://placehold.it/350x150. This simple functionality is very useful to control your photo places.
Placehold.it just create a image according to color and size given in url. We can do this with Php using its GD library.

Code

PHP(index.php)

if(isset($_GET)){
    $imagedata = explode('-',$_GET['data']); 
    if (!is_array($imagedata) || count($imagedata) != 4){
      die("Something wrong there!! It should be like -

           placeholder/350-150-CCCCCC-969696");
    }
    create_image($imagedata[0],

                 $imagedata[1], 

                 $imagedata[2],  

                 $imagedata[3]);
    exit;
}


function create_image($width, $height, $bg_color, $txt_color )

{

    $text = "$width X $height";

    //Create the image resource 

    $image = ImageCreate($width, $height);

    //Making of colors, we are changing HEX to RGB

    $bg_color = ImageColorAllocate($image, 

                base_convert(substr($bg_color, 0, 2), 16, 10), 
                base_convert(substr($bg_color, 2, 2), 16, 10), 
                base_convert(substr($bg_color, 4, 2), 16, 10));


    $txt_color = ImageColorAllocate($image, 

                base_convert(substr($txt_color, 0, 2), 16, 10), 
                base_convert(substr($txt_color, 2, 2), 16, 10), 
                base_convert(substr($txt_color, 4, 2), 16, 10));

    //Fill the background color 

    ImageFill($image, 0, 0, $bg_color); 
    //Calculating font size   

    $fontsize = ($width>$height)? ($height / 10) : ($width / 10) ;
    
    //Inserting Text    

     imagettftext($image,$fontsize, 0, 

                    ($width/2) - ($fontsize * 2.75), 

                    ($height/2) + ($fontsize* 0.2),  

                    $txt_color, 'Crysta.ttf', $text);


    //Tell the browser what kind of file is come in 

    header("Content-Type: image/png"); 
    //Output the newly created image in png format 

    imagepng($image);   
    //Free up resources
    ImageDestroy($image);
}
 

.htaccess

RewriteEngine On

RewriteRule ^([a-zA-Z0-9_-]+)/$ index.php?data=$1

Download

You can download it from here.