gd庫是開啟的，? 在網上找了很多方法就是顯示不出驗證碼，require_once 'string.func.php';//通過GD庫做驗證碼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, $length );}function verifyImage($type=1,$length=4,$pixel=0,$line=0,$sess_name = "verify"){?? ?session_start();?? ?//創建畫布?? ?$width = 80;?? ?$height = 28;?? ?$image = imagecreatetruecolor ( $width, $height );?? ?$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] = $chars;?? ?//$fontfiles = array ("MSYH.TTF", "MSYHBD.TTF", "SIMLI.TTF", "SIMSUN.TTC", "SIMYOU.TTF", "STZHONGS.TTF" );?? ?$fontfiles = array ("SIMYOU.TTF" );?? ?//由于字體文件比較大，就只保留一個字體，如果有需要的同學可以自己添加字體，字體在你的電腦中的fonts文件夾里有，直接運行輸入fonts就能看到相應字體?? ?for($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 < 50; $i ++) {?? ??? ??? ?imagesetpixel ( $image, mt_rand ( 0, $width - 1 ), mt_rand ( 0, $height - 1 ), $black );?? ??? ?}?? ?}?? ?if ($line) {?? ??? ?for($i = 1; $i < $line; $i ++) {?? ??? ??? ?$color = imagecolorallocate ( $image, mt_rand ( 50, 90 ), mt_rand ( 80, 200 ), mt_rand ( 90, 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" );?? ?imagegif ( $image );?? ?imagedestroy ( $image );}求答案。。。。。