本文实例为大家分享了一个漂亮的PHP验证码类,供大家参考,具体内容如下
font = dirname(__FILE__).'/font/elephant.ttf';//注意字体路径要写对,否则显示不了图片
}
//生成随机码
private function createCode() {
$_len = strlen($this->charset)-1;
for ($i=0;$i<$this->codelen;$i++) {
$this->code .= $this->charset[mt_rand(0,$_len)];
}
}
//生成背景
private function createBg() {
$this->img = imagecreatetruecolor($this->width,$this->height);
$color = imagecolorallocate($this->img,mt_rand(157,255),255));
imagefilledrectangle($this->img,$this->height,$this->width,$color);
}
//生成文字
private function createFont() {
$_x = $this->width / $this->codelen;
for ($i=0;$i<$this->codelen;$i++) {
$this->fontcolor = imagecolorallocate($this->img,mt_rand(0,156),156));
imagettftext($this->img,$this->fontsize,mt_rand(-30,30),$_x*$i+mt_rand(1,5),$this->height / 1.4,$this->fontcolor,$this->font,$this->code[$i]);
}
}
//生成线条、雪花
private function createLine() {
//线条
for ($i=0;$i<6;$i++) {
$color = imagecolorallocate($this->img,156));
imageline($this->img,$this->width),$this->height),$color);
}
//雪花
for ($i=0;$i<100;$i++) {
$color = imagecolorallocate($this->img,mt_rand(200,255));
imagestring($this->img,mt_rand(1,'*',$color);
}
}
//输出
private function outPut() {
header('Content-type:image/png');
imagepng($this->img);
imagedestroy($this->img);
}
//对外生成
public function doimg() {
$this->createBg();
$this->createCode();
$this->createLine();
$this->createFont();
$this->outPut();
}
//获取验证码
public function getCode() {
return strtolower($this->code);
}
}
输出实例:
使用方法: 1、先把验证码类保存为一个名为 ValidateCode.class.PHP 的文件; 2、新建一个名为 captcha.PHP 的文件进行调用该类;
captcha.PHP
doimg();
$_SESSION['authnum_session'] = $_vc->getCode();//验证码保存到SESSION中
代码如下:
PHP" align="absbottom" onclick="this.src='captcha.PHP?'+Math.random();">
PHP;">
<div class="jb51code">
<pre class="brush:xhtml;">