PHP验证码生成类完整代码
本文章提供这款php验证码生成类灵活好用,用户可以定义各个成员 有宽、高、画布、字数、类型、画类型同时我们只要修改 $Type就可以定义生成的是纯数字,纯小写字母,大小写数字混合,有需要的朋友可参考.
PHP验证码生成类完整代码如下:
<?php
class Code {
// 1. 定义各个成员 有宽、高、画布、字数、类型、画类型
private $width; //宽度
private $height; //高度
private $num; //验证码字数
private $imgType; //生成图片类型
private $Type; //字串类型 1,2,3 三个选项 1 纯数字 2 纯小写字母 3 大小写数字混合
private $hb; //画布
public $codestr; // 验证码字串
public function __construct($height = 20, $num = 4, $imgType = "jpeg", $Type = 1) {
$this->width = $num * 20;
$this->height = $height;
$this->num = $num;
$this->imgType = $imgType;
$this->Type = $Type;
$this->codestr = $this->codestr();
$this->zuhe();
}
// 2. 定义随机获取字符串函数
private function codestr() {
switch ($this->Type) {
case 1: // 类型为1 获取1-9随机数
$str = implode("", array_rand(range(0, 9) , $this->num));
break;
case 2: // 类型为2 获取a-z随机小写字母
$str = implode("", array_rand(array_flip(range(a, z)) , $this->num));
break;
case 3: // 类型为3 获取数字,小写字母,大写字母 混合
for ($i = 0; $i < $this->num; $i++) {
$m = rand(0, 2);
switch ($m) {
case 0:
$o = rand(48, 57);
break;
case 1:
$o = rand(65, 90);
break;
case 2:
$o = rand(97, 122);
break;
}
$str.= sprintf("%c", $o);
}
break;
}
return $str;
}
// 3. 初始化画布图像资源
private function Hb() {
$this->hb = imagecreatetruecolor($this->width, $this->height);
}
// 4. 生成背景颜色
private function Bg() {
return imagecolorallocate($this->hb, rand(130, 250) , rand(130, 250) , rand(130, 250));
}
// 5. 生成字体颜色
private function Font() {
return imagecolorallocate($this->hb, rand(0, 100) , rand(0, 100) , rand(0, 100));
}
// 6. 填充背景颜色
private function BgColor() {
imagefilledrectangle($this->hb, 0, 0, $this->width, $this->height, $this->Bg());
}
// 7. 干扰点
private function ganrao() {
$sum = floor(($this->width) * ($this->height) / 3);
for ($i = 0; $i < $sum; $i++) {
imagesetpixel($this->hb, rand(0, $this->width) , rand(0, $this->height) , $this->Bg());
}
}
// 8. 随机直线 弧线
private function huxian() {
for ($i = 0; $i < $this->num; $i++) {
imageArc($this->hb, rand(0, $this->width) , rand(0, $this->height) , rand(0, $this->width) , rand(0, $this->height) , rand(0, 360) , rand(0, 360) , $this->Bg());
}
}
// 9. 写字
private function xiezi() {
for ($i = 0; $i < $this->num; $i++) {
$x = ceil($this->width / $this->num) * $i;
$y = rand(1, $this->height - 15);
imagechar($this->hb, 5, $x + 4, $y, $this->codestr[$i], $this->Font());
}
}
// 10. 输出
private function OutImg() {
$shuchu = "image" . $this->imgType;
$header = "Content-type:image/" . $this->imgType;
if (function_exists($shuchu)) {
header($header);
$shuchu($this->hb);
} else {
exit("GD库没有此类图像");
}
}
// 11. 拼装
private function zuhe() {
$this->Hb();
$this->BgColor();
$this->ganrao();
$this->huxian();
$this->xiezi();
$this->OutImg();
} //开源代码phprm.com
public function getCodeStr() {
return $this->codestr;
}
}本文地址:http://www.phprm.com/tuxiang/fs4897.html
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