php - GD Lib to save a image -

i have code snippet of following

$code = generatecode($characters);       /* font size 75% of image height */       $font_size = $height * 0.75;       $image = imagecreate($width, $height) or die('cannot initialize new gd image stream');       /* set colours */       $background_color = imagecolorallocate($image, 255, 255, 255);       $text_color = imagecolorallocate($image, 20, 40, 100);       $noise_color = imagecolorallocate($image, 100, 120, 180);       /* generate random dots in background */       for( $i=0; $i<($width*$height)/3; $i++ ) {          imagefilledellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color);       }       /* generate random lines in background */       for( $i=0; $i<($width*$height)/150; $i++ ) {          imageline($image, mt_rand(0,$width), mt_rand(0,$height), mt_rand(0,$width), mt_rand(0,$height), $noise_color);       }       /* create textbox , add text */       $textbox = imagettfbbox($font_size, 0, $font, $code) or die('error in imagettfbbox function');       $x = ($width - $textbox[4])/2;       $y = ($height - $textbox[5])/2;       imagettftext($image, $font_size, 0, $x, $y, $text_color, $font , $code) or die('error in imagettftext function');       /* output captcha image browser */       header('content-type: image/jpeg');       imagejpeg($image);       imagedestroy($image);       $_session['security_code'] = $code; 

i'm struggling save image, able render it, there way save capcha image instead of redering it?

yes can, tip: second parameter, if not set or null, raw image stream outputted directly.

hope helps.

http://php.net/manual/en/function.imagepng.php