<?php
//Session保存路径
$sessSavePath = dirname(__FILE__)."/../data/sessions/";
if(is_writeable($sessSavePath) && is_readable($sessSavePath)){ session_save_path($sessSavePath); }
//获取随机字符
$rndstring = "";
for($i=0;$i<4;$i++){
$rndstring .= chr(mt_rand(65,90));
}
//如果支持GD,则绘图
if(function_exists("imagecreate"))
{
//PutCookie("dd_ckstr",strtolower($rndstring),1800,"/");
session_register('dd_ckstr');
$_SESSION['dd_ckstr'] = strtolower($rndstring);
$rndcodelen = strlen($rndstring);
//图片大小
$im = imagecreate(50,20);
//字体
$font_type = dirname(__FILE__)."/data/ant2.ttf";
//背景颜色
$bgcolor = ImageColorAllocate($im, 245,245,245);
//边框色
$iborder = ImageColorAllocate($im, 0x71,0x76,0x67);
//字体色
//不支持 imagettftext
$fontColor = ImageColorAllocate($im, 0x50,0x4d,0x47);
//支持 imagettftext
$fontColor2 = ImageColorAllocate($im, 0x36,0x38,0x32);
//阴影
$fontColor1 = ImageColorAllocate($im, 0xbd,0xc0,0xb8);
//杂点背景线
//$lineColor1 = ImageColorAllocate($im, 130,220,245);
//$lineColor2 = ImageColorAllocate($im, 225,245,255);
//背景线
//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);
//边框
imagerectangle($im, 0, 0, 49, 19, $iborder);
$strposs = array();
//文字
for($i=0;$i<$rndcodelen;$i++){
if(function_exists("imagettftext")){
$strposs[$i][0] = $i*10+6;
$strposs[$i][1] = mt_rand(15,18);
imagettftext($im, 11, 5, $strposs[$i][0]+1, $strposs[$i][1]+1, $fontColor1, $font_type, $rndstring[$i]);
}
else{
imagestring($im, 5, $i*10+6, mt_rand(2,4), $rndstring[$i], $fontColor);
}
}
//文字
for($i=0;$i<$rndcodelen;$i++){
if(function_exists("imagettftext")){
imagettftext($im, 11,5, $strposs[$i][0]-1, $strposs[$i][1]-1, $fontColor2, $font_type, $rndstring[$i]);
}
}
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);
}else{ //不支持GD,只输出字母 ABCD
//PutCookie("dd_ckstr","abcd",1800,"/");
session_register('dd_ckstr');
$_SESSION['dd_ckstr'] = "abcd";
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");
$fp = fopen("./vdcode.jpg","r");
echo fread($fp,filesize("./vdcode.jpg"));
fclose($fp);
}
?>