Very useful PHP Verification code class, very useful PHP code _php tutorial

Very useful PHP Verification code class, very useful PHP verification code

This example for everyone to share the PHP verification code class, for your reference, the specific content as follows

<?php/** * * @author Administrator * * */class validatecode{private $width;   Private $height;   Private $codeNum;   Private $img _resouce;   Private $disturbColorNum;      Private $checkCode;     function __construct ($width =80, $height =20, $codeNum =4) {$this->width= $width;     $this->height= $height;     $this->codenum= $codeNum;     $this->checkcode= $this->createcheckcode ();     $number =floor ($width * $height/25);     if ($number >240-$codeNum) {$this->disturbcolornum=240-$codeNum;     }else{$this->disturbcolornum= $number;     }} Public Function showImage ($fontpath = ") {//Create image Background $this->img_resouce ();     Var_dump ($img _resouce);     Set the interference element $this->setdistructcolor ();     Randomly draw text $this->outputtext ($fontpath) into the image;   Output Image $this->outputimage (); /** * * Get randomly created verification code */Public Function Getcheckcode () {} private Function Img_resouce () {//Create a true Color Image $this->img_resouce=imagecreatetruecolor ($this->width, $this->height);     Randomly set image background $backcolor =imagecolorallocate ($this->img_resouce,rand (225,255), Rand (225,255), Rand (225,255));     Fill Color Imagefill ($this->img_resouce, 0, 0, $backcolor);     Set Border background $border =imagecolorallocate ($this->img_resouce, 0,0,0);   Draw a rectangular imagerectangle ($this->img_resouce,0,0, $this->width-1, $this->height-1, $border);              } Private Function Setdistructcolor () {//Painting interference point for ($i = 0; $i < $this->disturbcolornum; $i + +) {     Imagesetpixel ($this->img_resouce, rand (1, $this->width-2), rand (1, $this->height-2), rand (0,255)); }//Painting interference line for ($j = 0; $j <3; $j + +) {$linecolor =imagecolorallocate ($this->img_resouce,rand (0,255       ), Rand (0,255), Rand (0,255));        Imagearc ($this->img_resouce, rand (0, $this->width), rand (0, $this->height), Rand (Ten, 225), Rand (20, 150),     , $linecolor); }} Private Function CreatechecKcode () {$code = ' 23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ ';     $string = ";       for ($i = 0; $i < $this->codenum; $i + +) {$char = $code {rand (0, strlen ($code)-1)};     $string. = $char;   } return $string; } Private Function Outputtext ($fontpath = ") {for ($i = 0; $i < $this->codenum; $i + +) {$fontcolor =imagec       Olorallocate ($this->img_resouce, rand (0,128), rand (0, $), rand (0, 128));          if ($fontpath = = ") {$fontsize =rand (3, 5);          $x =floor ($this->width/$this->codenum) * $i +3;          $y =rand (0, $this->height-20);     Imagechar ($this->img_resouce, $fontsize, $x, $y, $this->checkcode{$i}, $fontcolor);          }else{$fontsize =rand (12, 16);          $x =floor (($this->width-8)/$this->codenum) * $i +8;          $y =rand ($fontsize, $this->height-15);        Imagettftext ($this->img_resouce, $fontsize, Rand ( -45,45), $x, $y, $fontcolor, Fontpath, $this->checkcode{$i}); }     }} Private Function Outputimage () {if (Imagetypes () & Img_gif) {header ("Content-type:image       /gif ");     Imagegif ($this->img_resouce);       }else if (Imagetypes () & Img_jpeg) {header ("content-type:image/jpeg");     Imagejpeg ($this->img_resouce);       }else if (Imagetypes () & Img_png) {header ("content-type:image/png");     Imagepng ($this->img_resouce);     }else {echo "PHP unsupported Type";   }} Private Function __destruct () {Imagedestroy ($this->img_resouce); }}?>

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