PHP object-oriented simple verification code class

PHP simple verification code class, can be used directly, replace the font path

<?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 = &#39;font/elephant.ttf&#39;; #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) {
            $string = array_merge(range(&#39;a&#39;, &#39;z&#39;), range(0, 9), range(&#39;A&#39;, &#39;Z&#39;), range(0, 9));
            for ($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 = &#39;font/elephant.ttf&#39;;
        } 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
$string = &#39;abc123&#39;;
authCode::img()->createAuthCode($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();
*/
    ?>

The above is about the encapsulation process of the verification code class, which can be used directly. Please point out any errors.

For more related questions, please visit the PHP Chinese website: PHP Video Tutorial

The above is the detailed content of PHP object-oriented simple verification code class. For more information, please follow other related articles on the PHP Chinese website!