Image verification code file sharing written in PHP,
Jul 06, 2016 pm 02:25 PMShare picture verification code class files written in PHP,
Suitable for customized verification code class!
<?php /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ Class Image{ private $img; public $width = 85; public $height = 25; public $code; public $code_len = 4; public $code_str = "329832983DSDSKDSLKQWEWQ2lkfDSFSDjfdsfdsjwlkfj93290KFDSKJFDSOIDSLK"; public $bg_color = '#DCDCDC'; public $font_size = 16; public $font = 'font.ttf'; public $font_color = '#000000'; //創(chuàng)建驗(yàn)證碼餓字符創(chuàng) public function create_code(){ $code = ''; for( $i=0;$i<$this->code_len;$i++ ){ $code .= $this->code_str[mt_rand(0, strlen($this->code_str)-1)]; } return $this->code = $code; } //輸出圖像 public function getImage(){ $w = $this->width; $h = $this->height; $bg_color = $this->bg_color; $img = imagecreatetruecolor($w, $h); $bg_color = imagecolorallocate($img, hexdec(substr($bg_color, 1,2)), hexdec(substr($bg_color, 3,2)), hexdec(substr($bg_color, 5,2))); imagefill($img, 0, 0, $bg_color); $this->img = $img; $this->create_font(); $this->create_pix(); $this->show_code(); } //寫入驗(yàn)證碼 public function create_font(){ $this->create_code(); $color = $this->font_color; $font_color = imagecolorallocate($this->img, hexdec(substr($color,1,2)), hexdec(substr($color, 3,2)), hexdec(substr($color,5,2))); $x = $this->width/$this->code_len; for( $i=0;$i<$this->code_len;$i++ ){ $txt_color = imagecolorallocate($this->img, mt_rand(0,100), mt_rand(0, 150), mt_rand(0, 200)); imagettftext($this->img, $this->font_size, mt_rand(-30, 30), $x*$i+mt_rand(3, 6), mt_rand($this->height/1.2, $this->height), $txt_color, $this->font , $this->code[$i]); //imagestring($this->img, $this->font_size, $x*$i+mt_rand(3, 6),mt_rand(0, $this->height/4) , $this->code[$i], $font_color); } $this->font_color = $font_color; } //畫干擾線 public function create_pix(){ $pix_color= $this->font_color; for($i=0;$i<100;$i++){ imagesetpixel($this->img, mt_rand(0, $this->width),mt_rand(0, $this->height), $pix_color); } for($j=0;$j<4;$j++){ imagesetthickness($this->img, mt_rand(1, 2)); imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $pix_color); } } //得到驗(yàn)證碼 public function getCode(){ return strtoupper($this->code); } //輸出驗(yàn)證碼 private function show_code(){ header("Content-type:image/png"); imagepng($this->img); imagedestroy($this->img); } }
Let’s look at another example code:
Generate an image type verification code. The verification code contains numbers and capital letters. The md5 encrypted verification code is stored in the session
<?php /** * 圖片驗(yàn)證碼類 * 生成圖片類型驗(yàn)證碼,驗(yàn)證碼包含數(shù)字和大寫字母,session中存放md5加密后的驗(yàn)證碼 * * 使用方法: * $captcha = new Catpcha(); * $captcha->buildAndExportImage(); * * 作 者: luojing * 創(chuàng)建時(shí)間: 2013-3-27 上午11:42:12 */ class Captcha { private $width;//寬度 private $height; //高度 private $codeNum;//驗(yàn)證碼字符數(shù)量 private $image;//驗(yàn)證碼圖像資源 private $sessionKey;//session中保存的名字 private $captcha;//驗(yàn)證碼字符串 const charWidth = 10;//單個(gè)字符寬度,根據(jù)輸出字符大小而變 /** * 創(chuàng)建驗(yàn)證碼類,初始化相關(guān)參數(shù) * @param $width 圖片寬度 * @param $height 圖片高度 * @param $codeNum 驗(yàn)證碼字符數(shù)量 * @param $sessionKey session中保存的名字 */ function __construct($width = 50, $height = 20, $codeNum = 4, $sessionKey = 'captcha') { $this->width = $width; $this->height = $height; $this->codeNum = $codeNum; $this->sessionKey = $sessionKey; //保證最小高度和寬度 if($height < 20) { $this->height = 20; } if($width < ($codeNum * self::charWidth + 10)) {//左右各保留5像素空隙 $this->width = $codeNum * self::charWidth + 10; } } /** * 構(gòu)造并輸出驗(yàn)證碼圖片 */ public function buildAndExportImage() { $this->createImage(); $this->setDisturb(); $this->setCaptcha(); $this->exportImage(); } /** * 構(gòu)造圖像,設(shè)置底色 */ private function createImage() { //創(chuàng)建圖像 $this->image = imagecreatetruecolor($this->width, $this->height); //創(chuàng)建背景色 $bg = imagecolorallocate($this->image, mt_rand(220, 255), mt_rand(220, 255), mt_rand(220, 255)); //填充背景色 imagefilledrectangle($this->image, 0, 0, $this->width - 1, $this->height - 1, $bg); } /** * 設(shè)置干擾元素 */ private function setDisturb() { //設(shè)置干擾點(diǎn) for($i = 0; $i < 150; $i++) { $color = imagecolorallocate($this->image, mt_rand(150, 200), mt_rand(150, 200), mt_rand(150, 200)); imagesetpixel($this->image, mt_rand(5, $this->width - 10), mt_rand(5, $this->height - 3), $color); } //設(shè)置干擾線 for($i = 0; $i < 10; $i++) { $color = imagecolorallocate($this->image, mt_rand(150, 220), mt_rand(150, 220), mt_rand(150, 220)); imagearc($this->image, mt_rand(-10, $this->width), mt_rand(-10, $this->height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $color); } //創(chuàng)建邊框色 $border = imagecolorallocate($this->image, mt_rand(0, 50), mt_rand(0, 50), mt_rand(0, 50)); //畫邊框 imagerectangle($this->image, 0, 0, $this->width - 1, $this->height - 1, $border); } /** * 產(chǎn)生并繪制驗(yàn)證碼 */ private function setCaptcha() { $str = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ'; //生成驗(yàn)證碼字符 for($i = 0; $i < $this->codeNum; $i++) { $this->captcha .= $str{mt_rand(0, strlen($str) - 1)}; } //繪制驗(yàn)證碼 for($i = 0; $i < strlen($this->captcha); $i++) { $color = imagecolorallocate($this->image, mt_rand(0, 200), mt_rand(0, 200), mt_rand(0, 200)); $x = floor(($this->width - 10)/$this->codeNum); $x = $x*$i + floor(($x-self::charWidth)/2) + 5; $y = mt_rand(2, $this->height - 20); imagechar($this->image, 5, $x, $y, $this->captcha{$i}, $color); } } /* * 輸出圖像,驗(yàn)證碼保存到session中 */ private function exportImage() { if(imagetypes() & IMG_GIF){ header('Content-type:image/gif'); imagegif($this->image); } else if(imagetypes() & IMG_PNG){ header('Content-type:image/png'); imagepng($this->iamge); } else if(imagetypes() & IMG_JPEG) { header('Content-type:image/jpeg'); imagepng($this->iamge); } else { imagedestroy($this->image); die("Don't support image type!"); } //將驗(yàn)證碼信息保存到session中,md5加密 if(!isset($_SESSION)){ session_start(); } $_SESSION[$this->sessionKey] = md5($this->captcha); imagedestroy($this->image); } function __destruct() { unset($this->width, $this->height, $this->codeNum,$this->captcha); } }
Example 3:
<?php class ValidationCode { private $width; private $height; private $codeNum; private $image; //圖像資源 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*$height/15); if($number > 240-$codeNum){ $this->disturbColorNum= 240-$codeNum; }else{ $this->disturbColorNum=$number; } } //通過訪問該方法向?yàn)g覽器中輸出圖像 function showImage($fontFace=""){ //第一步:創(chuàng)建圖像背景 $this->createImage(); //第二步:設(shè)置干擾元素 $this->setDisturbColor(); //第三步:向圖像中隨機(jī)畫出文本 $this->outputText($fontFace); //第四步:輸出圖像 $this->outputImage(); } //通過調(diào)用該方法獲取隨機(jī)創(chuàng)建的驗(yàn)證碼字符串 function getCheckCode(){ return $this->checkCode; } private function createImage(){ //創(chuàng)建圖像資源 $this->image=imagecreatetruecolor($this->width, $this->height); //隨機(jī)背景色 $backColor=imagecolorallocate($this->image, rand(225, 255), rand(225,255), rand(225, 255)); //為背景添充顏色 imagefill($this->image, 0, 0, $backColor); //設(shè)置邊框顏色 $border=imagecolorallocate($this->image, 0, 0, 0); //畫出矩形邊框 imagerectangle($this->image, 0, 0, $this->width-1, $this->height-1, $border); } private function setDisturbColor(){ for($i=0; $i<$this->disturbColorNum; $i++){ $color=imagecolorallocate($this->image, rand(0, 255), rand(0, 255), rand(0, 255)); imagesetpixel($this->image, rand(1, $this->width-2), rand(1, $this->height-2), $color); } for($i=0; $i<10; $i++){ $color=imagecolorallocate($this->image, rand(200, 255), rand(200, 255), rand(200, 255)); imagearc($this->image, rand(-10, $this->width), rand(-10, $this->height), rand(30, 300), rand(20, 200), 55, 44, $color); } } private function createCheckCode(){ //這里主要產(chǎn)生隨機(jī)碼,從2開始是為了區(qū)分1和l $code="23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ"; $string=''; for($i=0; $i < $this->codeNum; $i++){ $char=$code{rand(0, strlen($code)-1)}; $string.=$char; } return $string; } private function outputText($fontFace=""){ for($i=0; $i<$this->codeNum; $i++){ $fontcolor=imagecolorallocate($this->image, rand(0, 128), rand(0, 128), rand(0, 128)); if($fontFace==""){ $fontsize=rand(3, 5); $x=floor($this->width/$this->codeNum)*$i+3; $y=rand(0, $this->height-15); imagechar($this->image,$fontsize, $x, $y, $this->checkCode{$i},$fontcolor); }else{ $fontsize=rand(12, 16); $x=floor(($this->width-8)/$this->codeNum)*$i+8; $y=rand($fontSize+5, $this->height); imagettftext($this->image,$fontsize,rand(-30, 30),$x,$y ,$fontcolor, $fontFace, $this->checkCode{$i}); } } } private function outputImage() { if(imagetypes() & IMG_GIF){ header("Content-Type:image/gif"); imagepng($this->image); }else if(imagetypes() & IMG_JPG){ header("Content-Type:image/jpeg"); imagepng($this->image); }else if(imagetypes() & IMG_PNG){ header("Content-Type:image/png"); imagepng($this->image); }else if(imagetypes() & IMG_WBMP){ header("Content-Type:image/vnd.wap.wbmp"); imagepng($this->image); }else{ die("PHP不支持圖像創(chuàng)建"); } } function __destruct(){ imagedestroy($this->image); } }
Use as follows:
Test, call the verification code class
code.php
<?php session_start(); include "validationcode.class.php"; $code=new ValidationCode(80, 20, 4); $code->showImage(); //輸出到頁面中供 注冊(cè)或登錄使用 $_SESSION["code"]=$code->getCheckCode(); //將驗(yàn)證碼保存到服務(wù)器中

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