建議檢查下你每個參數的拼寫，我上次是因為content-tpye拼錯了導致的亂碼，你可能也哪里拼錯了

看看我的這個怎么樣

function verifyImage($type = 1,$length = 4,$pixel = 0,$line = 0,$sess_name = "verify"){

? ? //通過GD庫做驗證碼

? ? //創建畫布

? ? $width = 80;

? ? $height = 28;

? ? $image = imagecreatetruecolor($width, $height);

? ? //創建顏色

? ? $white = imagecolorallocate($image, 255, 255, 255);

? ? $black = imagecolorallocate($image, 0, 0, 0);

? ? //用填充矩形填充畫布

? ? imagefilledrectangle($image, 1, 1, $width-2, $height-2, $white);

? ? $chars = buildRandomString($type,$length);

? ? $_SESSION[$sess_name] = $chars;

? ? //存放字體我文件

? ? $fontfiles = array("MSYH.TTC","SIMYOU.TTF");

? ? for ($i = 0; $i < $length; $i++){

? ? ? ? $size = mt_rand(14, 18);

? ? ? ? $angle = mt_rand(-15, 15);

? ? ? ? $x = 5 + $i*$size;

? ? ? ? $y = mt_rand(20, 26);

? ? ? ? $fontfile = "../fonts/".$fontfiles[mt_rand(0, count($fontfiles)-1)];

? ? ? ? $color = imagecolorallocate($image, mt_rand(50, 90), mt_rand(80, 200), mt_rand(90, 180));

? ? ? ? $text = substr($chars, $i, 1);

? ? ? ? imagettftext($image, $size, $angle, $x, $y, $color, $fontfile, $text);

? ? }

? ? if ($pixel){

? ? ? ? for ($i = 0; $i < $pixel; $i++){

? ? ? ? ? ? imagesetpixel($image, mt_rand(0, $width-1), mt_rand(0, $height-1), $black);

? ? ? ? }

? ? }

? ? if ($line){

? ? ? ? for ($i = 0; $i < $line; $i++){

? ? ? ? ? ? $color = imagecolorallocate($image, mt_rand(100, 200), mt_rand(80, 200), mt_rand(100, 180));

? ? ? ? ? ? imageline($image, mt_rand(0, $width-1), mt_rand(0, $height-1), mt_rand(0, $width-1), mt_rand(0, $height-1), $color);

? ? ? ? }

? ? }

? ? header("content-type: image/gif");

? ? //顯示畫布

? ? imagegif($image);

? ? //銷毀資源

? ? imagedestroy($image);

}

/**

?* 生成驗證碼

?* @param int $type

?* @param int $length

?* @return string

?*/

function buildRandomString($type=1,$length=4){

if ($type == 1) {

$chars = join ( "", range ( 0, 9 ) );

} elseif ($type == 2) {

$chars = join ( "", array_merge ( range ( "a", "z" ), range ( "A", "Z" ) ) );

} elseif ($type == 3) {

$chars = join ( "", array_merge ( range ( "a", "z" ), range ( "A", "Z" ), range ( 0, 9 ) ) );

}

if ($length > strlen ( $chars )) {

exit ( "字符串長度不夠" );

}

$chars = str_shuffle ( $chars );

return substr ( $chars, 0, $length );

}