<?php?require_once 'string.func.php';//通過GD庫(kù)做驗(yàn)證碼function verifyImage($type=1,$length=4,$pixel=0,$line=0,$sess_name = "verify"){ session_start(); //創(chuàng)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" ); $fontfiles = array ("msyh.ttc","msyhbd.ttc","msyhl.ttc","simsun.ttc","ygyxs2.ttf" ); for($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, $text ); } //干擾點(diǎn) if ($pixel) { for($i = 0; $i < 50; $i ++) { imagesetpixel ( $image, mt_rand ( 0, $width - 1 ), mt_rand ( 0, $height - 1 ), $black ); } } //干擾線 if ($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 );}