Graphics
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<?
class img_add_txt{
/*
Created by Richard Sumilang
http://www.richard-sumilang.com
object img_add_txt($array);
------------------------------------
This function adds text on top of an image
Usage:
------------------------------------
$config=array(
"text" => "Coupon: Here is your free coupon",
"text_colors" => "255 68 0", // RGB Seperated by spaces
"image_loc" => "example.jpg",
"image_type" => "JPEG", // PNG and GIF Supported
// Optional arguments; default is center area on image
"x_pos" => "",
"y_pos" => "",
);
$graphic=new img_add_txt($config);
*/
function img_add_txt($config){
// header
//header("Content-Type: image/gif");
$this->func_header($config['image_type']);
// set up image
$im = ImageCreateFromJPEG($config['image_loc']);
// Set up text colors
$text_colors=explode(" ", $config['text_colors']);
$text_color = ImageColorAllocate($im, $text_colors['0'], $text_colors['1'], $text_colors['2']);
// get font dimensiona
$font_height = ImageFontHeight(3);
$font_width = ImageFontWidth(3);
// get image dimensiona
$image_height = ImageSY($im);
$image_width = ImageSX($im);
// get string length
$length = $font_width * strlen($config['text']);
// set the x, y cords of where the text will be placed
if(empty($config['x_pos'])){
// calculate start coordinates for string
$image_center_x = ($image_width/2)-($length/2);
}else{
$image_center_x = $config['x_pos'];
}
if(empty($config['y_pos'])){
// calculate start coordinates for string
$image_center_y = ($image_height/2)-($font_height/2);
}else{
$image_center_y = $config['y_pos'];
}
// write string
ImageString($im, 3, $image_center_x, $image_center_y, $config['text'], $text_color);
// output to browser
$this->output_image($config['image_type'], $im);
}// End img_add_txt
/*
Output the correct header based
on file type
*/
function func_header($var){
switch($var){
case "PNG":
header("Content-Type: image/png");
break;
case "GIF":
header("Content-Type: image/gif");
break;
case "JPEG":
header("Content-Type: image/jpeg");
break;
}
}// End func_header
/*
Output the correct image type
based on type
*/
function output_image($var, $pointer){
switch($var){
case "PNG":
ImagePNG($pointer);
break;
case "GIF":
ImageGIF($pointer);
break;
case "JPEG":
ImageJPEG($pointer);
break;
}
} // End out output image
} // End of class
?>
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Usage Example
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<?
/*
Pull in all the requirements
*/
require_once("class.img_add_txt.php");
/*
coupon image
*/
$config=array(
"text" => "Test",
"text_colors" => "0 0 0", // RGB Seperated by spaces
"image_loc" => "coupon.jpg",
"image_type" => "JPEG", // PNG and GIF Supported
// Optional arguments; default is center area on image
"x_pos" => "",
"y_pos" => "",
);
$graphic=new img_add_txt($config);
?>
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