php 图片验证码

淡淡的烟草味﹌ 2022-06-10 03:41 236阅读 0赞

自己写的图片验证码demo

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先引用Image类  use Org\\Util\\Image;

/**
         * 显示登录页面的验证码图片
         */
        public function verify() {
            ob_clean();
            Image::buildImageVerify(4, 1, 'png', 48, 22, C('CP_EXT_CFG.VERIFY_PRIFIX') . 'VRERIFY', false, false);
        }

页面调用（图片路径即为上面方法的路径）

//图片验证码
        $(document).ready(function () {
            $('#verifyImg').click(function () {
                var url = $(this).attr('src') + '&t=';
                $('#verifyImg').attr('src', url + (new Date()).valueOf().toString());
            });
        });

##### image类 #####

/**
 * 图像操作类库
 */
 class Image {
 
 /**
 * 取得图像信息
 * @static
 * @access public
 * @param string $image 图像文件名
 * @return mixed
 */
 static function getImageInfo($img) {
 $imageInfo = getimagesize($img);
 if ($imageInfo !== false) {
 $imageType = strtolower(substr(image_type_to_extension($imageInfo[2]), 1));
 $imageSize = filesize($img);
 $info = array(
 "width" => $imageInfo[0],
 "height" => $imageInfo[1],
 "type" => $imageType,
 "size" => $imageSize,
 "mime" => $imageInfo['mime']
 );
 return $info;
 } else {
 return false;
 }
 }
 
 /**
 * 为图片添加水印
 * @static public
 * @param string $source 原文件名
 * @param string $water 水印图片
 * @param string $$savename 添加水印后的图片名
 * @param string $alpha 水印的透明度
 * @return void
 */
 static public function water($source, $water, $savename = null, $alpha = 80) {
 //检查文件是否存在
 if (!file_exists($source) || !file_exists($water))
 return false;
 //图片信息
 $sInfo = self::getImageInfo($source);
 $wInfo = self::getImageInfo($water);
 //如果图片小于水印图片，不生成图片
 if ($sInfo["width"] < $wInfo["width"] || $sInfo['height'] < $wInfo['height'])
 return false;
 //建立图像
 $sCreateFun = "imagecreatefrom" . $sInfo['type'];
 $sImage = $sCreateFun($source);
 $wCreateFun = "imagecreatefrom" . $wInfo['type'];
 $wImage = $wCreateFun($water);
 //设定图像的混色模式
 imagealphablending($wImage, true);
 //图像位置,默认为右下角右对齐
 $posY = $sInfo["height"] - $wInfo["height"];
 $posX = $sInfo["width"] - $wInfo["width"];
 //生成混合图像
 imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo['width'], $wInfo['height'], $alpha);
 //输出图像
 $ImageFun = 'Image' . $sInfo['type'];
 //如果没有给出保存文件名，默认为原图像名
 if (!$savename) {
 $savename = $source;
 @unlink($source);
 }
 //保存图像
 $ImageFun($sImage, $savename);
 imagedestroy($sImage);
 }
 
 function showImg($imgFile, $text = '', $x = '10', $y = '10', $alpha = '50') {
 //获取图像文件信息
 //增加图片水印输出，$text为图片的完整路径即可
 $info = Image::getImageInfo($imgFile);
 if ($info !== false) {
 $createFun = str_replace('/', 'createfrom', $info['mime']);
 $im = $createFun($imgFile);
 if ($im) {
 $ImageFun = str_replace('/', '', $info['mime']);
 //水印开始
 if (!empty($text)) {
 $tc = imagecolorallocate($im, 0, 0, 0);
 if (is_file($text) && file_exists($text)) {//判断$text是否是图片路径
 // 取得水印信息
 $textInfo = Image::getImageInfo($text);
 $createFun2 = str_replace('/', 'createfrom', $textInfo['mime']);
 $waterMark = $createFun2($text);
 //$waterMark=imagecolorallocatealpha($text,255,255,0,50);
 $imgW = $info["width"];
 $imgH = $info["width"] * $textInfo["height"] / $textInfo["width"];
 //$y	=	($info["height"]-$textInfo["height"])/2;
 //设置水印的显示位置和透明度支持各种图片格式
 imagecopymerge($im, $waterMark, $x, $y, 0, 0, $textInfo['width'], $textInfo['height'], $alpha);
 } else {
 imagestring($im, 80, $x, $y, $text, $tc);
 }
 //ImageDestroy($tc);
 }
 //水印结束
 if ($info['type'] == 'png' || $info['type'] == 'gif') {
 imagealphablending($im, FALSE); //取消默认的混色模式
 imagesavealpha($im, TRUE); //设定保存完整的 alpha 通道信息
 }
 Header("Content-type: " . $info['mime']);
 $ImageFun($im);
 @ImageDestroy($im);
 return;
 }
 //保存图像
 $ImageFun($sImage, $savename);
 imagedestroy($sImage);
 //获取或者创建图像文件失败则生成空白PNG图片
 $im = imagecreatetruecolor(80, 30);
 $bgc = imagecolorallocate($im, 255, 255, 255);
 $tc = imagecolorallocate($im, 0, 0, 0);
 imagefilledrectangle($im, 0, 0, 150, 30, $bgc);
 imagestring($im, 4, 5, 5, "no pic", $tc);
 Image::output($im);
 return;
 }
 }
 
 /**
 * 生成缩略图
 * @static
 * @access public
 * @param string $image 原图
 * @param string $type 图像格式
 * @param string $thumbname 缩略图文件名
 * @param string $maxWidth 宽度
 * @param string $maxHeight 高度
 * @param string $position 缩略图保存目录
 * @param boolean $interlace 启用隔行扫描
 * @return void
 */
 static function thumb($image, $thumbname, $type = '', $maxWidth = 200, $maxHeight = 50, $interlace = true) {
 // 获取原图信息
 $info = Image::getImageInfo($image);
 if ($info !== false) {
 $srcWidth = $info['width'];
 $srcHeight = $info['height'];
 $type = empty($type) ? $info['type'] : $type;
 $type = strtolower($type);
 $interlace = $interlace ? 1 : 0;
 unset($info);
 $scale = min($maxWidth / $srcWidth, $maxHeight / $srcHeight); // 计算缩放比例
 if ($scale >= 1) {
 // 超过原图大小不再缩略
 $width = $srcWidth;
 $height = $srcHeight;
 } else {
 // 缩略图尺寸
 $width = (int) ($srcWidth * $scale);
 $height = (int) ($srcHeight * $scale);
 }
 // 载入原图
 $createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
 $srcImg = $createFun($image);
 //创建缩略图
 if ($type != 'gif' && function_exists('imagecreatetruecolor'))
 $thumbImg = imagecreatetruecolor($width, $height);
 else
 $thumbImg = imagecreate($width, $height);
 // 复制图片
 if (function_exists("ImageCopyResampled"))
 imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth, $srcHeight);
 else
 imagecopyresized($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth, $srcHeight);
 if ('gif' == $type || 'png' == $type) {
 //imagealphablending($thumbImg, false);//取消默认的混色模式
 //imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息
 $background_color = imagecolorallocate($thumbImg, 0, 255, 0); // 指派一个绿色
 imagecolortransparent($thumbImg, $background_color); // 设置为透明色，若注释掉该行则输出绿色的图
 }
 
 // 对jpeg图形设置隔行扫描
 if ('jpg' == $type || 'jpeg' == $type)
 imageinterlace($thumbImg, $interlace);
 
 // 生成图片
 $imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
 $imageFun($thumbImg, $thumbname);
 imagedestroy($thumbImg);
 imagedestroy($srcImg);
 return $thumbname;
 }
 return false;
 }
 
 /**
 * 根据给定的字符串生成图像
 * @static
 * @access public
 * @param string $string 字符串
 * @param string $size 图像大小 width,height 或者 array(width,height)
 * @param string $font 字体信息 fontface,fontsize 或者 array(fontface,fontsize)
 * @param string $type 图像格式 默认PNG
 * @param integer $disturb 是否干扰 1 点干扰 2 线干扰 3 复合干扰 0 无干扰
 * @param bool $border 是否加边框 array(color)
 * @return string
 */
 static function buildString($string, $rgb = array(), $filename = '', $type = 'png', $disturb = 1, $border = true) {
 if (is_string($size))
 $size = explode(',', $size);
 $width = $size[0];
 $height = $size[1];
 if (is_string($font))
 $font = explode(',', $font);
 $fontface = $font[0];
 $fontsize = $font[1];
 $length = strlen($string);
 $width = ($length * 9 + 10) > $width ? $length * 9 + 10 : $width;
 $height = 22;
 if ($type != 'gif' && function_exists('imagecreatetruecolor')) {
 $im = @imagecreatetruecolor($width, $height);
 } else {
 $im = @imagecreate($width, $height);
 }
 if (empty($rgb)) {
 $color = imagecolorallocate($im, 102, 104, 104);
 } else {
 $color = imagecolorallocate($im, $rgb[0], $rgb[1], $rgb[2]);
 }
 $backColor = imagecolorallocate($im, 255, 255, 255); //背景色（随机）
 $borderColor = imagecolorallocate($im, 100, 100, 100); //边框色
 $pointColor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255)); //点颜色
 
 @imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
 @imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
 @imagestring($im, 5, 5, 3, $string, $color);
 if (!empty($disturb)) {
 // 添加干扰
 if ($disturb = 1 || $disturb = 3) {
 for ($i = 0; $i < 25; $i++) {
 imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $pointColor);
 }
 } elseif ($disturb = 2 || $disturb = 3) {
 for ($i = 0; $i < 10; $i++) {
 imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $pointColor);
 }
 }
 }
 Image::output($im, $type, $filename);
 }
 
 /**
 * 生成图像验证码
 * @static
 * @access public
 * @param string $length 位数
 * @param string $mode 类型
 * @param string $type 图像格式
 * @param string $width 宽度
 * @param string $height 高度
 * @return string
 */
 static function buildImageVerify($length = 4, $mode = 1, $type = 'png', $width = 48, $height = 22, $verifyName = 'verify') {
 import('ORG.Util.String');
 $randval = String::randString($length, $mode);
 $_SESSION[$verifyName] = md5($randval);
 $width = ($length * 10 + 10) > $width ? $length * 10 + 10 : $width;
 if ($type != 'gif' && function_exists('imagecreatetruecolor')) {
 $im = imagecreatetruecolor($width, $height);
 } else {
 $im = imagecreate($width, $height);
 }
 $r = Array(225, 255, 255, 223);
 $g = Array(225, 236, 237, 255);
 $b = Array(225, 236, 166, 125);
 $key = mt_rand(0, 3);
 
 $backColor = imagecolorallocate($im, $r[$key], $g[$key], $b[$key]); //背景色（随机）
 $borderColor = imagecolorallocate($im, 100, 100, 100); //边框色
 imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
 imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
 $stringColor = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));
 // 干扰
 for ($i = 0; $i < 10; $i++) {
 imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $stringColor);
 }
 for ($i = 0; $i < 25; $i++) {
 imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $stringColor);
 }
 for ($i = 0; $i < $length; $i++) {
 imagestring($im, 5, $i * 10 + 5, mt_rand(1, 8), $randval{$i}, $stringColor);
 }
 Image::output($im, $type);
 }
 
 // 中文验证码
 static function GBVerify($length = 4, $type = 'png', $width = 180, $height = 50, $fontface = 'simhei.ttf', $verifyName = 'verify') {
 import('ORG.Util.String');
 $code = String::randString($length, 4);
 $width = ($length * 45) > $width ? $length * 45 : $width;
 $_SESSION[$verifyName] = md5($code);
 $im = imagecreatetruecolor($width, $height);
 $borderColor = imagecolorallocate($im, 100, 100, 100); //边框色
 $bkcolor = imagecolorallocate($im, 250, 250, 250);
 imagefill($im, 0, 0, $bkcolor);
 @imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
 // 干扰
 for ($i = 0; $i < 15; $i++) {
 $fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
 imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $fontcolor);
 }
 for ($i = 0; $i < 255; $i++) {
 $fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
 imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $fontcolor);
 }
 if (!is_file($fontface)) {
 $fontface = dirname(__FILE__) . "/" . $fontface;
 }
 for ($i = 0; $i < $length; $i++) {
 $fontcolor = imagecolorallocate($im, mt_rand(0, 120), mt_rand(0, 120), mt_rand(0, 120)); //这样保证随机出来的颜色较深。
 $codex = String::msubstr($code, $i, 1);
 imagettftext($im, mt_rand(16, 20), mt_rand(-60, 60), 40 * $i + 20, mt_rand(30, 35), $fontcolor, $fontface, $codex);
 }
 Image::output($im, $type);
 }
 
 /**
 * 把图像转换成字符显示
 * @static
 * @access public
 * @param string $image 要显示的图像
 * @param string $type 图像类型，默认自动获取
 * @return string
 */
 static function showASCIIImg($image, $string = '', $type = '') {
 $info = Image::getImageInfo($image);
 if ($info !== false) {
 $type = empty($type) ? $info['type'] : $type;
 unset($info);
 // 载入原图
 $createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
 $im = $createFun($image);
 $dx = imagesx($im);
 $dy = imagesy($im);
 $i = 0;
 $out = '';
 set_time_limit(0);
 for ($y = 0; $y < $dy; $y++) {
 for ($x = 0; $x < $dx; $x++) {
 $col = imagecolorat($im, $x, $y);
 $rgb = imagecolorsforindex($im, $col);
 $str = empty($string) ? '*' : $string[$i++];
 $out .= sprintf('' . $str . '', $rgb['red'], $rgb['green'], $rgb['blue']);
 }
 $out .= " \n";
 }
 $out .= '';
 imagedestroy($im);
 return $out;
 }
 return false;
 }
 
 /**
 * 生成UPC-A条形码
 * @static
 * @param string $type 图像格式
 * @param string $type 图像格式
 * @param string $lw 单元宽度
 * @param string $hi 条码高度
 * @return string
 */
 static function UPCA($code, $type = 'png', $lw = 2, $hi = 100) {
 static $Lencode = array('0001101', '0011001', '0010011', '0111101', '0100011',
 '0110001', '0101111', '0111011', '0110111', '0001011');
 static $Rencode = array('1110010', '1100110', '1101100', '1000010', '1011100',
 '1001110', '1010000', '1000100', '1001000', '1110100');
 $ends = '101';
 $center = '01010';
 /* UPC-A Must be 11 digits, we compute the checksum. */
 if (strlen($code) != 11) {
 die("UPC-A Must be 11 digits.");
 }
 /* Compute the EAN-13 Checksum digit */
 $ncode = '0' . $code;
 $even = 0;
 $odd = 0;
 for ($x = 0; $x < 12; $x++) {
 if ($x % 2) {
 $odd += $ncode[$x];
 } else {
 $even += $ncode[$x];
 }
 }
 $code.= ( 10 - (($odd * 3 + $even) % 10)) % 10;
 /* Create the bar encoding using a binary string */
 $bars = $ends;
 $bars.=$Lencode[$code[0]];
 for ($x = 1; $x < 6; $x++) {
 $bars.=$Lencode[$code[$x]];
 }
 $bars.=$center;
 for ($x = 6; $x < 12; $x++) {
 $bars.=$Rencode[$code[$x]];
 }
 $bars.=$ends;
 /* Generate the Barcode Image */
 if ($type != 'gif' && function_exists('imagecreatetruecolor')) {
 $im = imagecreatetruecolor($lw * 95 + 30, $hi + 30);
 } else {
 $im = imagecreate($lw * 95 + 30, $hi + 30);
 }
 $fg = ImageColorAllocate($im, 0, 0, 0);
 $bg = ImageColorAllocate($im, 255, 255, 255);
 ImageFilledRectangle($im, 0, 0, $lw * 95 + 30, $hi + 30, $bg);
 $shift = 10;
 for ($x = 0; $x < strlen($bars); $x++) {
 if (($x < 10) || ($x >= 45 && $x < 50) || ($x >= 85)) {
 $sh = 10;
 } else {
 $sh = 0;
 }
 if ($bars[$x] == '1') {
 $color = $fg;
 } else {
 $color = $bg;
 }
 ImageFilledRectangle($im, ($x * $lw) + 15, 5, ($x + 1) * $lw + 14, $hi + 5 + $sh, $color);
 }
 /* Add the Human Readable Label */
 ImageString($im, 4, 5, $hi - 5, $code[0], $fg);
 for ($x = 0; $x < 5; $x++) {
 ImageString($im, 5, $lw * (13 + $x * 6) + 15, $hi + 5, $code[$x + 1], $fg);
 ImageString($im, 5, $lw * (53 + $x * 6) + 15, $hi + 5, $code[$x + 6], $fg);
 }
 ImageString($im, 4, $lw * 95 + 17, $hi - 5, $code[11], $fg);
 /* Output the Header and Content. */
 Image::output($im, $type);
 }
 
 static function output($im, $type = 'png', $filename = '') {
 header("Content-type: image/" . $type);
 $ImageFun = 'image' . $type;
 if (empty($filename)) {
 $ImageFun($im);
 } else {
 $ImageFun($im, $filename);
 }
 imagedestroy($im);
 }

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