A beautiful PHP verification code_PHP tutorial

A beautiful PHP verification code

Verification codes are very important in WEB applications. They are usually used to prevent users from maliciously submitting forms, such as malicious registration and login, malicious forum spamming, etc.
You can import fonts yourself and modify them according to your needs.

A beautiful verification code reflects the generosity of the website.

<span style="font-size:14px;"><!--?php
    class Imagecode{
        private $width ;
        private $height;
        private $counts;
        private $distrubcode;
        private $fonturl;
        private $session;
        function __construct($width = 120,$height = 30,$counts = 5,$distrubcode=1235467890qwertyuipkjhgfdaszxcvbnm,$fonturl=C:WindowsFontsTektonPro-BoldCond.otf){
            $this--->width=$width;
            $this->height=$height;
            $this->counts=$counts;
            $this->distrubcode=$distrubcode;
            $this->fonturl=$fonturl;
            $this->session=$this->sessioncode();
            session_start();
            $_SESSION[&#39;code&#39;]=$this->session;
        }
        
         function imageout(){
            $im=$this->createimagesource();
            $this->setbackgroundcolor($im);
            $this->set_code($im);
            $this->setdistrubecode($im);
            ImageGIF($im);
            ImageDestroy($im);
        }
        
        private function createimagesource(){
            return imagecreate($this->width,$this->height);
        }
        private function setbackgroundcolor($im){
            $bgcolor = ImageColorAllocate($im, rand(200,255),rand(200,255),rand(200,255));//&plusmn;&sup3;&frac34;&deg;&Ntilde;&Otilde;&Eacute;&laquo;
            imagefill($im,0,0,$bgcolor);
        }
        private function setdistrubecode($im){
            $count_h=$this->height;
            $cou=floor($count_h*2);
            for($i=0;$i<$cou;$i++){
                $x=rand(0,$this->width);
                $y=rand(0,$this->height);
                $jiaodu=rand(0,360);
                $fontsize=rand(8,15);
                $fonturl=$this->fonturl;
                $originalcode = $this->distrubcode;
                $countdistrub = strlen($originalcode);
                $dscode = $originalcode[rand(0,$countdistrub-1)];
                $color = ImageColorAllocate($im, rand(40,140),rand(40,140),rand(40,140));
                imagettftext($im,$fontsize,$jiaodu,$x,$y,$color,$fonturl,$dscode);
                
            }
        }
        private function set_code($im){
                $width=$this->width;
                $counts=$this->counts;
                $height=$this->height;
                $scode=$this->session;
                $y=floor($height/2)+floor($height/4);
                $fontsize=rand(30,35);
                $fonturl=C:WindowsFontsAdobeGothicStd-Bold.otf;//$this->fonturl;
                
                $counts=$this->counts;
                for($i=0;$i<$counts;$i++){
                    $char=$scode[$i];
                    $x=floor($width/$counts)*$i+8;
                    $jiaodu=rand(-20,30);
                    $color = ImageColorAllocate($im,rand(0,50),rand(50,100),rand(100,140));
                    imagettftext($im,$fontsize,$jiaodu,$x,$y,$color,$fonturl,$char);
                }
                
            
            
        }
        private function sessioncode(){
                $originalcode = $this->distrubcode;
                $countdistrub = strlen($originalcode);
                $_dscode = ;
                $counts=$this->counts;
                for($j=0;$j<$counts;$j++){
                    $dscode = $originalcode[rand(0,$countdistrub-1)];
                    $_dscode.=$dscode;
                }
                return $_dscode;
                
        }
    }
    Header(Content-type: image/GIF);
    $imagecode=new  Imagecode(160,50);
    $imagecode->imageout();


</span>

http://www.bkjia.com/PHPjc/1030448.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1030448.htmlTechArticleA beautiful PHP verification code is very important in WEB applications. It is usually used to prevent users from maliciously submitting forms. Such as malicious registration and login, malicious forum spamming, etc. You can import fonts yourself...