PHP implementation of the code file class instance, _php tutorial

PHP implementation of the Captcha file class instance,

This article describes the PHP implementation of the code file class. Share to everyone for your reference. Specific as follows:

<?php/*** @file * @version 1.0* @author Net Prodigal * @brief Verification code file class **/class ccheckcodefile{//authentication code BITS Private $mCheckCodeNum = 4; The generated verification code private $mCheckCode = ";//The picture of the verification code private $mCheckImage =";//interference pixel private $mDisturbColor = ";//The picture width of the captcha is private $ Mcheckimagewidth = ' 80 ';//The image width of the verification code is private $mCheckImageHeight = ' ";/**** @brief output head **/private function Outfileheader () {Header ("Content-type:image/png");} /**** @brief Generate Verification Code **/private function Createcheckcode () {$this->mcheckcode = Strtoupper (substr (MD5 (rand ()), 0,$  This->mcheckcodenum)); return $this->mcheckcode;} /**** @brief generate Captcha picture **/private function CreateImage () {$this->mcheckimage = @imagecreate ($this Mcheckimagewidth, $this->mcheckimageheight);  Imagecolorallocate ($this->mcheckimage, 200, 200, 200); return $this->mcheckimage;} /**** @brief set Image interference pixels **/private function Setdisturbcolor () {for ($i =0; $i <=128; $i + +) {$this->mdisturbcolor = IM Agecolorallocate ($this->mcheckimage, rand (0,255), rand (0,255), Rand (0,255));  Imagesetpixel ($this->mcheckimage,rand (2,128), Rand (2,38), $this->mdisturbcolor); }}/**** @brief Set the size of the CAPTCHA picture * * @param $width Width * * @param $height high **/public function Setcheckimagewh ($width, $height) {if ($ width== ' | | $height = = ") return false; $this->mcheckimagewidth = $width; $this->mcheckimageheight = $height; return true;} /**** @brief on the verification code picture one by one on the verification code **/private function Writecheckcodetoimage () {for ($i =0; $i <= $this->mcheckcodenum; $i +  +) {$BG _color = imagecolorallocate ($this->mcheckimage, rand (0,255), Rand (0,128), Rand (0,255));  $x = Floor ($this->mcheckimagewidth/$this->mcheckcodenum) * $i;  $y = rand (0, $this->mcheckimageheight-15);  Imagechar ($this->mcheckimage, 5, $x, $y, $this->mcheckcode[$i], $bg _color); }}/**** @brief Output Verification code picture **/public function Outcheckimage () {$this->outfileheader (); $this->createcheckcode (); $ This->createimage (); $this->setdisturbcolor (); $this->writecheckcodetoimage (); Imagepng ($this-&GT;MCHeckimage); Imagedestroy ($this->mcheckimage);}} $c _check_code_image = new Ccheckcodefile ()//$c _check_code_image-&GT;SETCHECKIMAGEWH (100,50);//Set the size of the display captcha picture $c_ Check_code_image->outcheckimage ();? >

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