2
我有以下GD库保存图像
$code = generateCode($characters);
/* font size will be 75% of the image height */
$font_size = $height * 0.75;
$image = imagecreate($width, $height) or die('Cannot initialize new GD image stream');
/* set the 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 and 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 , $code) or die('Error in imagettftext function');
/* output captcha image to browser */
header('Content-Type: image/jpeg');
imagejpeg($image);
imagedestroy($image);
$_SESSION['security_code'] = $code;
我挣扎保存图像的代码片段,但我能够渲染它,有没有办法救CAPCHA图像,而不是拒绝它?
你没弄清楚你是否想将其保存到一个文件,数据库或一个变量。 – stillstanding 2010-11-16 13:05:07
@stillstanding - 给文件 – Roland 2010-11-16 13:08:14