PHP function to generate text png images

/*
php generates text png images, calling method:
http://www.yourdomian.com/text_png.php3?msg=helloworld+class&rot=15&size=48&font=fonts/ARIAL. TTF

*/

Header("Content-type: image/png");

class textPNG {
 var $font = 'fonts/TIMES.TTF'; //Default font. Relative to the script storage directory Path.
 var $msg = "undefined"; // Default text.
 var $size = 24;
 var $rot = 0; // Rotation angle.
 var $pad = 0; // Padding.
 var $transparent = 1; // Text transparency.
 var $red = 0; // On a black background...
 var $grn = 0;
 var $blu = 0;
 var $bg_red = 255; // Set the text is white.
 var $bg_grn = 255;
 var $bg_blu = 255;

function draw() {
 $width = 0;
 $height = 0;
 $offset_x = 0;
 $offset_y = 0;
 $ bounds = array();
 $image = "";

 // Determine the text height.
 $bounds = ImageTTFBBox($this->size, $this->rot, $this->font, "W ");
 if ($this->rot < 0) {
 $font_height = abs($bounds[7]-$bounds[1]);
 } else if ($this->rot > 0 ) {
 $font_height = abs($bounds[1]-$bounds[7]);
 } else {
 $font_height = abs($bounds[7]-$bounds[1]);
 }

 // Determine the border height.
 $bounds = ImageTTFBBox($this->size, $this->rot, $this->font, $this->msg);
 if ($this->rot < 0) {
 $width = abs($bounds[4]-$bounds[0]);
 $height = abs($bounds[3]-$bounds[7]);
 $offset_y = $font_height;
 $ offset_x = 0;

 } else if ($this->rot > 0) {
 $width = abs($bounds[2]-$bounds[6]);
 $height = abs($bounds[1 ]-$bounds[5]);
 $offset_y = abs($bounds[7]-$bounds[5])+$font_height;
 $offset_x = abs($bounds[0]-$bounds[6]);

 } else {
 $width = abs($bounds[4]-$bounds[6]);
 $height = abs($bounds[7]-$bounds[1]);
 $offset_y = $font_height; ;
 $offset_x = 0;
 }

 $image = imagecreate($width+($this->pad*2)+1,$height+($this->pad*2)+1);

 $ background = ImageColorAllocate($image, $this->bg_red, $this->bg_grn, $this->bg_blu);
 $foreground = ImageColorAllocate($image, $this->red, $this-> grn, $this->blu);

 if ($this->transparent) ImageColorTransparent($image, $background);
 ImageInterlace($image, false);

 // Draw.
 ImageTTFText($image , $this->size, $this->rot, $offset_x+$this->pad, $offset_y+$this->pad, $foreground, $this->font, $this->msg) ;

 // Output in png format.
 imagePNG($image);
}
}

$text = new textPNG;

if (isset($msg)) $text->msg = $msg; / / Text to be displayed
if (isset($font)) $text->font = $font; // Font
if (isset($size)) $text->size = $size; // Text size
if (isset($rot)) $text->rot = $rot; // Rotation angle
if (isset($pad)) $text->pad = $pad; // padding
if (isset( $red)) $text->red = $red; // Text color
if (isset($grn)) $text->grn = $grn; // ..
if (isset($blu)) $text->blu = $blu; // ..
if (isset($bg_red)) $text->bg_red = $bg_red; // Background color.
if (isset($bg_grn)) $text- >bg_grn = $bg_grn; // ..
if (isset($bg_blu)) $text->bg_blu = $bg_blu; // ..
if (isset($tr)) $text->transparent = $tr; // Transparency (boolean).

$text->draw();
?>

For more application examples of the GD library, please refer to: Introduction to how to enable gd2 extension in php Example of php verification code (GD library generates verification code) Solution to Chinese garbled characters in php GD library Example of php GD library generating verification code php GD library code to upload images and create thumbnails php uses the GD library to generate images in bmp format (imagebmp)