www.gusucode.com > seacms 海洋PHP影视视频网站建站系统 v6.61PHP源码程序 > seacms 海洋PHP影视视频网站建站系统 v6.61/海洋cms V6.61/海洋cms V6.61/upload/include/vdimgck.php
<?php session_start(); //获取随机字符 $rndstring = ''; for($i=0; $i<4; $i++) $rndstring .= chr(mt_rand(65,90)); //如果支持GD,则绘图 if(function_exists("imagecreate")) { //Firefox部份情况会多次请求的问题,5秒内刷新页面将不改变session //$ntime = time(); $_SESSION['sea_ckstr'] = strtolower($rndstring); $_SESSION['sea_ckstr_last'] = ''; $rndcodelen = strlen($rndstring); //创建图片,并设置背景色 $im = imagecreate(50,20); ImageColorAllocate($im, 255,255,255); //背景线 $lineColor1 = ImageColorAllocate($im,240,220,180); $lineColor2 = ImageColorAllocate($im,255,255,255); for($j=3;$j<=16;$j=$j+3) { imageline($im,2,$j,48,$j,$lineColor1); } for($j=2;$j<52;$j=$j+(mt_rand(3,6))) { imageline($im,$j,2,$j-6,18,$lineColor2); } //画边框 $bordercolor = ImageColorAllocate($im, 0x99,0x99,0x99); imagerectangle($im, 0, 0, 46, 18, $bordercolor); //输出文字 $fontColor = ImageColorAllocate($im, 48,61,50); for($i=0;$i<$rndcodelen;$i++) { $bc = mt_rand(0,1); $rndstring[$i] = strtoupper($rndstring[$i]); imagestring($im, 5, $i*10+6, mt_rand(2,4), $rndstring[$i], $fontColor); } header("Pragma:no-cache\r\n"); header("Cache-Control:no-cache\r\n"); header("Expires:0\r\n"); //输出特定类型的图片格式,优先级为 gif -> jpg ->png if(function_exists("imagejpeg")) { header("content-type:image/jpeg\r\n"); imagejpeg($im); } else { header("content-type:image/png\r\n"); imagepng($im); } ImageDestroy($im); exit(); } else { //不支持GD,只输出字母 ABCD $_SESSION['sea_ckstr'] = "abcd"; $_SESSION['sea_ckstr_last'] = ''; header("content-type:image/jpeg\r\n"); header("Pragma:no-cache\r\n"); header("Cache-Control:no-cache\r\n"); header("Expires:0\r\n"); $fp = fopen("data/vdcode.jpg","r"); echo fread($fp,filesize("data/vdcode.jpg")); fclose($fp); exit(); } ?>