我犯了一個PHP文件,稱爲createCaptcha.php,代碼是這樣的:PHP故障與顯示器的GD圖像
create_image();
exit();
function create_image() {
//Let's generate a totally random string using md5
$md5_hash = md5(rand(0,999));
//We don't need a 32 character long string so we trim it down to 5
$security_code = substr($md5_hash, 15, 5);
//Set the session to store the security code
$_SESSION["security_code"] = $security_code;
//Set the image width and height
$width = 100;
$height = 20;
//Create the image resource
$image = ImageCreate($width, $height);
//We are making three colors, white, black and gray
$white = ImageColorAllocate($image, 255, 255, 255);
$black = ImageColorAllocate($image, 0, 0, 0);
$grey = ImageColorAllocate($image, 204, 204, 204);
//Make the background black
ImageFill($image, 0, 0, $black);
//Add randomly generated string in white to the image
ImageString($image, 3, 30, 3, $security_code, $white);
//Throw in some lines to make it a little bit harder for any bots to break
ImageRectangle($image,0,0,$width-1,$height-1,$grey);
imageline($image, 0, $height/2, $width, $height/2, $grey);
imageline($image, $width/2, 0, $width/2, $height, $grey);
//Tell the browser what kind of file is come in
header("Content-Type: image/jpeg");
//Output the newly created image in jpeg format
ImageJpeg($image);
//Free up resources
ImageDestroy($image);
}
現在,當我嘗試做一個include('createCaptcha.php');
我得到這樣的警告:
Warning: Cannot modify header information - headers already sent by (output started at C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\gtw\index.php:14) in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\gtw\registration\createCaptcha.php on line 43
而輸出是一系列不可理解的比特(我認爲那些rapresent圖像)。事實上,我之前設置了標題。我該如何解決這個問題?
index.php第14行是什麼? – 2011-03-11 15:34:31
我的網站的頭..'
'... – markzzz 2011-03-11 15:37:19那麼你打電話這太遲了。 – 2011-03-11 15:49:23