支持背景为调色板和图片文件的验证码类
<?
/**
* 验证码类
* @author firerat
* @email lukai_rat@163.com
* @time Feb 16 2011 15:28
* @lastmodify Feb 16 2011 15:28
*/
class verifycode{
//image source
private $im;
//图片宽度
private $w;
//图片高度
private $h;
//验证字符集合
private $text;
//字符数
private $length;
//字体
private $font = array();
//字体大小
private $fontsize = array();
//字体颜色
private $fontcolor = array();
//字体的偏转角度
private $angel = array();
//背景色
private $backgroundcolor = array();
//背景图片
private $backgroundimage = array();
//坐标-x
private $x ;
//坐标-y
private $y ;
//验证码存放的字段
private $checkcodefield ;
/**
* 构造函数
*
*/
public function __construct(){
//图片宽度
$this->w = 500 ;
//图片高度
$this->h = 600;
//验证字符
$this->text = '0123456789qwertyuiopasdfghjklzxcvbnm';
//字体
$this->font = array(
'C:\\WINDOWS\\Fonts\\Ming Imperial.TTF',
'C:\\WINDOWS\\Fonts\\latha.TTF',
'C:\\WINDOWS\\Fonts\\ARIALNBI.TTF',
'C:\\WINDOWS\\Fonts\\GOTHICBI.TTF'
);
//字符数
$this->length = '4';
//字体大小
$this->fontsize = array(50,60,70);
//字体颜色
$this->fontcolor = array(
array('red'=>0x14, 'green'=>0x37,'blue'=>0xad),
array('red'=>0x6e, 'green'=>0x86,'blue'=>0xd6),
array('red'=>0x2c, 'green'=>0x40 ,'blue'=>0x81),
array('red'=>0x06, 'green'=>0x1f ,'blue'=>0x70),
array('red'=>0x14, 'green'=>0x37 ,'blue'=>0xad),
array('red'=>0x57, 'green'=>0x79 ,'blue'=>0xc0)
);
//字体的偏转角度
$this->angel = array(2,4,8,-2,-4,-8);
//背景色
$this->backgroundcolor = array(
array('red'=>0x14, 'green'=>0x37,'blue'=>0xad),
array('red'=>0x6e, 'green'=>0x86,'blue'=>0xd6),
array('red'=>0x2c, 'green'=>0x40 ,'blue'=>0x81),
array('red'=>0x06, 'green'=>0x1f ,'blue'=>0x70),
array('red'=>0x14, 'green'=>0x37 ,'blue'=>0xad),
array('red'=>0x57, 'green'=>0x79 ,'blue'=>0xc0)
);
//背景图片
$this->backgroundimage = array(
'F:\\city_photo\\city_photo\\1\\1807141.jpg',
'F:\\city_photo\\city_photo\\1\\1807141.jpg',
'F:\\city_photo\\city_photo\\1\\1807141.jpg',
'F:\\city_photo\\city_photo\\1\\1807141.jpg',
'F:\\city_photo\\city_photo\\1\\1807141.jpg'
);
//坐标轴X
$this->x = 100 ;
//坐标轴Y
$this->y = 300 ;
//验证码存放的字段
$this->checkcodefield = 'checkcode';
}
/* 创建背景
*
* @return $im
*/
public function createImgae(){
//$this->im = imagecreatetruecolor($this->w,$this->h);
$key = array_rand($this->backgroundimage);
$this->im = imagecreatefromjpeg( $this->backgroundimage[$key]);
return $this->im;
}
/* 创建背景的索引色
*
* @return
*/
public function createBackgroundColor(){
//获取背景随机颜色组key
$rgbGroupKey = array_rand($this->backgroundcolor);
$red = $this->backgroundcolor[$rgbGroupKey]['red'];
$green = $this->backgroundcolor[$rgbGroupKey]['green'];
$blue = $this->backgroundcolor[$rgbGroupKey]['blue'];
//返回颜色索引
return imagecolorallocate($this->im, $red, $green, $blue);
}
/* 获取随机字符，并将字符存放发到
*
* @return
*/
public function getRandStr(){
$randChars = '';
for($i = 0 ; $i < $this->length ; $i++){
$randChars .= $this->text[rand(0,strlen($this->text))] ;
}
//字体编码统一转换为utf-8
//$randChars = iconv("GB2312","UTF-8",$randChars);
//写进session
$_SESSION[$this->checkcodefield] = $randChars;
return $randChars;
}
/* 创建字体颜色索引
* @return
*/
public function createFontColor(){
//获取背景随机颜色组key
$rgbGroupKey = array_rand($this->fontcolor);
$red = $this->fontcolor[$rgbGroupKey]['red'];
$green = $this->fontcolor[$rgbGroupKey]['green'];
$blue = $this->fontcolor[$rgbGroupKey]['blue'];
//颜色索引
return imagecolorallocate($this->im, $red, $green, $blue);;
}
//添加文字到图片
public function addTextToImage(){
//字体颜色
$fontcolor =$this->createFontColor();
//字体
$key = array_rand($this->font);
$font = $this->font[$key];
//验证码
$text = $this->getRandStr();
//偏转角度
$key = array_rand($this->angel);
$_angle = $this->angel[$key];
//起始坐标
$x = $this->x;
$y = $this->y;
//字体大小
$key = array_rand($this->fontsize);
$_fontsize = $this->fontsize[$key];
//添加文字到图片
imagettftext($this->im, $_fontsize , $_angle, $x, $y, $fontcolor, $font, $text);
}
/**
* 输出图片
*
*/
public function outputImage(){
//创建布景
$this->createImgae();
//颜色添加到布景
$this->createBackgroundColor();
//添加文字到图片
$this->addTextToImage();
//增加过期,30分钟后过期
$expireTime = date("M, d Y H:i:s",time()+1800);
header("Expires: {$expireTime} GMT ");
header("Last-Modified: " . gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
//声明输出文件的类型
header('Content-type: image/png');
//输出png图片
imagepng($this->im);
//释放与此图片关联的内存
imagedestroy($this->im);
}
}
$instance = new verifycode;
$instance->outputImage();3. [图片] examplle2.jpg
以上就是支持背景为调色板和图片文件的验证码类的内容，更多相关内容请关注PHP中文网（www.php.cn）！
