php graphics image processing

 header("content-type:image/jpeg");

 /*1. Simple image output*/
 $im = imagecreate(60,40);
 $pink = imagecolorallocate($im,35, 25,220);
imagejpeg($im);

 //imagestring($im,16, 200, 200,"I LOVE YOU",);

/* 2. Write the string Into the image*/
 //Load the image
 $me=imagecreatefromjpeg("../../images/3.jpg");
 //Set the font color
 $text_color = imagecolorallocate($me, 255, 84,0);
 //The position of the set font
 $font = "C:WindowsFontssimkai.ttf";
 //The string to be written
 $str = iconv('GBK',"UTF-8", "php development...");
 //Write the string into the image
 imagettftext($me,20,0,50,50, $text_color,$font, $str);
 //Output the image
 imagejpeg($me);
 //Release resources
 imagedestroy($me);

session_start();
header("content-type:image/jpeg");
//Verification code
//Image width
$image_width =65;
//Image height
$image_height =45;
//Set the random number seed
//srand(microtime()*1000);

 for ($i=0;$i<6;$i++){
 $new_str .=dechex(rand(0, 100 ));
 }
 $_SESSION[code]=$new_str;

 $image = imagecreate($image_width, $image_height);
 imagecolorallocate($image,rand(0,255), rand(0,255),rand(0,255)) ;

 for ($i=0;$i
 $font = mt_rand(3, 8);//Generate random font size
 $x = mt_rand(3 ,10)+$image_width*$i/4;
 $y = mt_rand(3,$image_height/4);
 $color = imagecolorallocate($image,mt_rand(0, 255), mt_rand(0, 255), mt_rand (0, 255));
 imagestring($image, $font, $x, $y,$_SESSION[code][$i], $color);
 }
 imagepng($image);
 imagedestroy($image );

image processing, php