With this script you can resize your image, ad a watermark or copyright to image and output the image in JPEG, GIF or PNG format.

Usage:
1. Parameters are passed via URL: image.php?image=1.jpg;
2. You can set the type of your output image to JPG, GIF or PNG format like this: image.php?image=1.jpg&type=png; If you don’t specify the type of the output image, the script will output the image in the original format image.php?image=1.jpg;
3. To add a watermark to image you heave to set 2 variables: watermark_text and watermark_color(optional).Black will be use if you do not set the watermark_color;
Example:
1) image.php?image=1.jpg&watermark_text=1234567890&watermark_color=fffff;
2) image.php?image=1.jpg&watermark_text=1234567890;
4. Resizing images:
a. Exact size:
Variables: w and h
Example: image.php?image=1.jpg&w=100&h=100
b. Maxim size:
Variable: maxim_size
Example: image.php?image=1.jpg&maxim_size=300
c. Percent:
Variable: percent
Example: image.php?image=1.jpg&percent=50
d. Square:
Variable: square
Example: image.php?image=1.jpg&square=100
I use this type of resizing for creating thumbnails that heave the same size

For watermarking I use GEORGIA.TTF font;

Source code:

<?
if($_GET['image']){
    $image = $_GET['image'];

    if($_GET['type']=="jpg"){
        header("Content-type: image/jpeg");
    }elseif($_GET['type']=="gif"){
        header("Content-type: image/gif");
    }elseif($_GET['type']=="png"){
        header("Content-type: image/png");
    }else{
        if(substr($image, -3)=="jpg" || substr($image, -3)=="JPG"){header("Content-type: image/jpeg");}
        elseif(substr($image, -3)=="gif" || substr($image, -3)=="GIF"){header("Content-type: image/gif");}
        elseif(substr($image, -3)=="png" || substr($image, -3)=="PNG"){header("Content-type: image/png");}
    }

    if(substr($image, -3)=="jpg" || substr($image, -3)=="JPG"){$im = imagecreatefromjpeg($image);}
    elseif(substr($image, -3)=="gif" || substr($image, -3)=="GIF"){$im = imagecreatefromgif($image);}
    elseif(substr($image, -3)=="png" || substr($image, -3)=="PNG"){$im = imagecreatefrompng($image);}

    if($_GET['percent']){
        $x = round((imagesx($im)*$_GET['percent'])/100);
        $y = round((imagesy($im)*$_GET['percent'])/100);
        $yyy=0;
        $xxx=0;
        $imw = imagecreatetruecolor($x,$y);
    }elseif($_GET['w'] and $_GET['h']){
        $x = $_GET['w'];
        $y = $_GET['h'];
        $yyy=0;
        $xxx=0;
        $imw = imagecreatetruecolor($x,$y);
    }elseif($_GET['maxim_size']){
        if(imagesy($im)>=$_GET['maxim_size'] || imagesx($im)>=$_GET['maxim_size']){
            if(imagesy($im)>=imagesx($im)){
                $y = $_GET['maxim_size'];
                $x = ($y*imagesx($im))/imagesy($im);
            }else{
                $x = $_GET['maxim_size'];
                $y = ($x*imagesy($im))/imagesx($im);
            }
        }else{
            $x = imagesx($im);
            $y = imagesy($im);
        }
        $yyy=0;
        $xxx=0;
        $imw = imagecreatetruecolor($x,$y);
    }elseif($_GET['square']){
        if(imagesy($im)>=$_GET['square'] || imagesx($im)>=$_GET['square']){
            if(imagesy($im)>=imagesx($im)){
                $x = $_GET['square'];
                $y = ($x*imagesy($im))/imagesx($im);
                $yyy=-($y-$x)/2;
                $xxx=0;
            }else{
                $y = $_GET['square'];
                $x = ($y*imagesx($im))/imagesy($im);
                $xxx=-($x-$y)/2;
                $yyy=0;
            }
        }else{
            $x = imagesx($im);
            $y = imagesy($im);
            $yyy=0;
            $xxx=0;
        }
        $imw = imagecreatetruecolor($_GET['square'],$_GET['square']);
    }else{
        $x = imagesx($im);
        $y = imagesy($im);
        $yyy=0;
        $xxx=0;
        $imw = imagecreatetruecolor($x,$y);
    }

    imagecopyresampled($imw, $im, $xxx,$yyy,0,0,$x,$y,imagesx($im), imagesy($im));

    if($_GET['watermark_text']){
        if($_GET['watermark_color']){$watermark_color=$_GET['watermark_color'];
        }else{
            $watermark_color="000000";
        }
        $red=hexdec(substr($watermark_color,0,2));
        $green=hexdec(substr($watermark_color,2,2));
        $blue=hexdec(substr($watermark_color,4,2));

        $text_col = imagecolorallocate($imw, $red,$green,$blue);
        $font = "georgia.ttf"; //this font(georgia.ttf) heave to be in the same directory as this script
        $font_size = 12;
        $angle = 0;
        $box = imagettfbbox($font_size, $angle, $font, $_GET['watermark_text']);
        $x = 5;
        $y = 17;
        imagettftext($imw, $font_size, $angle, $x, $y, $text_col, $font, $_GET['watermark_text']);

    }

    if($_GET['type']=="jpg"){imagejpeg($imw);}
    elseif($_GET['type']=="gif"){imagegif($imw);}
    elseif($_GET['type']=="png"){imagepng($imw);}
    else{
        if(substr($image, -3)=="jpg" || substr($image, -3)=="JPG"){imagejpeg($imw);}
        elseif(substr($image, -3)=="gif" || substr($image, -3)=="GIF"){imagegif($imw);}
        elseif(substr($image, -3)=="png" || substr($image, -3)=="PNG"){imagepng($imw);}
    }

    imagedestroy($imw);
}
?>

Tags: image resize, image watermark, php

This entry was posted on Sunday, October 12th, 2008 at 20:45 and is filed under PHP and MySQL. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.