how to set php image script height and width?

[santa banta]

hi friend please suggss me
how to set image height or width in that script
thanx in advance

<?php
Header("Content-type: image/png");
$data= basename(dirname(__FILE__));
$msg ="$data";

class textPNG
{
var $font = '../AnkeHand.ttf'; //default font. directory relative to script directory.
// default text to display.
var $size = 60; // default font size.
var $rot = 0; // rotation in degrees.
var $pad = 10; // padding.
var $transparent = 0; // transparency set to on.
var $red = 255; // white text...
var $grn = 2;
var $blu = 9;
var $bg_red = 32; // on black background.
var $bg_grn = 25;
var $bg_blu = 26;

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

// get the font 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 bounding box.
$bounds = ImageTTFBBox($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);

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

// output PNG object.
imagePNG($image);
}
}

$text = new textPNG;

if (isset($msg)) $text->msg = $msg; // text to display
if (isset($font)) $text->font = $font; // font to use (include directory if needed).
if (isset($size)) $text->size = $size; // size in points
if (isset($rot)) $text->rot = $rot; // rotation
if (isset($pad)) $text->pad = $pad; // padding in pixels around text.
if (isset($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 flag (boolean).
$text->draw(); // GO!!!!!

?>