欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  后端开发

PHP面向对象简易验证码类

程序员文章站 2022-03-16 18:10:52
...
PHP简单验证码类,可直接使用,替换字体路径
<?php
class authCode
{
    private static $instance = null;     #实例对象
    private $width = 120;                #图片宽度
    private $height = 40;                #图片高度
    private $font = 'font/elephant.ttf'; #字体文件路径
    private $fontSize = 14;              #字体大小
    private $strLen = 6;                 #字符个数
    private $auth_code_str = null;       #验证码结果
    private $imgResult = null;           #图片资源
    
    #入口文件 静态方法调用 实例化对象 可用 对象方法调用
    public static function img()
    {
        if (!(self::$instance instanceof self)) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
     #随机颜色
    private function randomColor($img = null, $min = 0, $max = 255)
    {
        $rgb = [];
        for ($i = 1; $i <= 3; $i++) {
            $rgb[] = str_pad(rand($min, $max), 3, 0, STR_PAD_LEFT);
        }
        return imagecolorallocate($img, $rgb[0], $rgb[1], $rgb[2]);
    }
    
    #随机字符串
    private function randomStr($num = 4)
    {
        if ($num > 0) {
            $string = array_merge(range('a', 'z'), range(0, 9), range('A', 'Z'), range(0, 9));
            for ($i = 1; $i <= $num; $i++) {
                shuffle($string);
                $this->auth_code_str .= array_pop($string);
            }
        }
        return $this;
    }
    
     #创建验证码
    public function createAuthCode(&$codeStr = false)
    {
        if (!$this->auth_code_str) {
            $this->randomStr($this->strLen);
        }
        if ($codeStr !== false && empty($codeStr)) {
            $codeStr = $this->auth_code_str;
        } else if (!empty($codeStr) && $codeStr !== false) {
            $this->auth_code_str = $codeStr;
        }
        $this->imgResult = imagecreatetruecolor($this->width, $this->height);
        $background = $this->randomColor($this->imgResult, 200);
        imagefilledrectangle($this->imgResult, 0, 0, $this->width, $this->height, $background);
        $y = ($this->height - $this->fontSize);
        $string = str_split($this->auth_code_str, 1);
        for ($i = 0; $i < count($string); $i++) {
            $frontColor = $this->randomColor($this->imgResult, 0, 200);
            imagefttext($this->imgResult, $this->fontSize, rand(0, 10), ($this->fontSize + 2) * $i + 10, $y, $frontColor, $this->font, $string[$i]);
        }
        return $this;
    }
    
      #生成线
    public function line($line = 3)
    {
        $line = $line ?: 3;
        for ($i = 1; $i <= $line; $i++) {
            $lineColor = $this->randomColor($this->imgResult, 0, 200);
            imageline($this->imgResult, rand(0, $this->width / 5), rand(5, $this->height - 5), rand($this->width / 1.3, $this->width), rand(5, $this->height - 5), $lineColor);
        }
        return $this;
    }
    
    #噪点
    public function pixel($num = 50){
        $num = $num ?: 3;
        for ($i = 1; $i <= $num; $i++) {
            $lineColor = $this->randomColor($this->imgResult, 0, 100);
            imagesetpixel($this->imgResult, rand(0, $this->width), rand(0, $this->height), $lineColor);
        }
        return $this;
    }
    
     #设置大小
    public function size($width = null, $height = null)
    {
        $this->width = $width ?: 120;
        $this->height = $height ?: 40;
        return $this;
    }
    
    #设置字体大小
    public function fontSize($fontsize = 14)
    {
        $this->fontSize = $fontsize ?: 14;
        return $this;
    }
    
    #设置字体
    public function font($file = null)
    {
        if (is_null($file) === true) {
            $this->font = 'font/elephant.ttf';
        } else {
            $this->font = $file;
        }
        return $this;
    }
    
    #设置长度
    public function strlen($num = null)
    {
        $this->strLen = $num ?: 6;
        return $this;
    }
    
    public function display()
    {
        ob_end_flush();
        header("content-type:image/jpeg");
        imagejpeg($this->imgResult, null, 100);
        imagedestroy($this->imgResult);
        exit;
    }
}

#简单调用方法
authCode::img()->createAuthCode()->display();
/*
#指定字符串调用
$string = 'abc123';
authCode::img()->createAuthCode($string)->display();
 
#设置图片大小、字数、字体大小
authCode::img()->strlen(8)->size(300,100)->fontSize(30)->createAuthCode()->display();
 
#添加噪点
authCode::img()->createAuthCode()->line()->pixel()->display();
*/
    ?>

以上便是关于验证码类的封装过程,可以直接使用。若有错误请指出。

更多相关问题请访问PHP中文网:PHP视频教程

以上就是PHP面向对象简易验证码类的详细内容,更多请关注其它相关文章!

相关标签: 验证码