verify_code_cn.php

<?php 
include ('include/lib/Cookie.class.php');
header("Content-type: image/png");
$im = imagecreatetruecolor(80, 28);
$english = array(2,3,4,5,6,7,8,9,'A','B','C','D','E','F','G','H','I','J','K','L','M','N','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','j','k','m','n','p','q','r','s','t','u','v','w','x','y','z');
$chinese= array();
//$chinese = array("人","出","来","友","学","孝","仁","义","礼","廉","忠","国","中","易","白","者","火 ","土","金","木","雷","风","龙","虎","天","地", "生","晕","菜","鸟","田","三","百","钱","福","爱","情","兽","虫","鱼","九","网","新","度","哎","唉","啊","哦","仪","老","少","日","月","星","于","文","琦","搜","狐","卓","望"); 
$chars = array_merge($english,$chinese);
// 创建颜色 
$fontcolor = imagecolorallocate($im, 0x6c, 0x6c, 0x6c); 
//$bg = imagecolorallocate($im, rand(0,85), rand(85,170), rand(170,255)); 
$bg = imagecolorallocate($im, 0xfc, 0xfc, 0xfc); 
imagefill($im, 0, 0, $bg);
// 设置文字 
$text = "";
for($i=0;$i<6;$i++) $text .= trim($chars[rand(0,count($chars)-1)]); 
$cookie = new Cookie();
$cookie->add('osa_verify_code', $text);
$font = 'assets/font/tahoma.ttf'; 

$gray = ImageColorAllocate($im, 200,200,200); 

// 添加文字 
imagettftext($im, 15, 0, 1, 23, $fontcolor, $font, $text); 
//加入干扰象素
$r = rand()%50;
for($i=0;$i<150;$i++){
	$x=sqrt($i)*2+$r;
	imagesetpixel($im, abs(sin($i)*80) , abs(cos($i)*28) , $gray); 
	imagesetpixel($im, $x , $i , $gray); 
	imagesetpixel($im, rand()%80 , rand()%28 , $gray); 
	
}
// 输出图片 
imagepng($im); 
imagedestroy($im); 
//var_dump($text);
?>