109 lines
3.8 KiB
PHP
109 lines
3.8 KiB
PHP
<?php
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namespace common\modules\verifyimage;
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use Yii;
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/**生成图片验证码
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* Class VerifyImageUtil
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* @package common\modules\verifyimage
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*/
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class VerifyImageUtil
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{
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/**
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* @param int $code_type
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* case $code_type == 1: only numbers;
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* case $code_type == 2: only letters;
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* case $code_type == 3: numbers and letters;
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* @param int $code_length
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* @return string
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*/
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private function CreateRandomVerifyCode($code_type = 1, $code_length = 4)
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{
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if ($code_type == 1) {
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$chars = join("", range(0, 9));
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} elseif ($code_type == 2) {
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$chars = join("", array_merge(range('a', 'z'), range('A', 'Z')));
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} else {
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$chars = join("", array_merge(range(0, 9), range('a', 'z'), range('A', 'Z')));
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}
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if (strlen($chars) < $code_length) {
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exit("Error in VerifyImage(class): 字符串长度不够，CreateRandomVerifyCode Failed");
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}
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$chars = str_shuffle($chars);
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return substr($chars, 0, $code_length);
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}
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/**
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* @param int $width
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* @param int $height
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* @param int $pixed_num
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* @param int $line_num
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* @param int $code_type
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* @param int $code_length
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* @return array
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*/
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public static function CreateVerifyImage($width = 100, $height = 40, $pixed_num = 80, $line_num = 5, $code_type = 1, $code_length = 4)
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{
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$m_verify_code = self::CreateRandomVerifyCode($code_type, $code_length);
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$m_image = imagecreatetruecolor($width, $height);
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$white = imagecolorallocate($m_image, 255, 255, 255);
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imagefill($m_image, 0, 0, $white);
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// 注意：将字体导入到fonts目录下
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$font_files = array(__DIR__ . '/arial.ttf', __DIR__ . '/consola.ttf');
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for ($i = 0; $i < $code_length; $i++) {
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$size = mt_rand(15, 20);
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$angle = mt_rand(-15, 15);
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// 将字符串显示到一个居中的位置
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$x = (imagefontwidth($size) + 5) * ($i + 1);
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$y = ($height - imagefontheight($size)) / 2 + $size;
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$color = imagecolorallocate($m_image, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
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$font = $font_files[mt_rand(0, count($font_files) - 1)];
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$text = substr($m_verify_code, $i, 1);
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imagettftext($m_image, $size, $angle, $x, $y, $color, $font, $text);
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}
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for ($i = 0; $i < $pixed_num; $i++) {
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$color = imagecolorallocate($m_image, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
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imagesetpixel($m_image, mt_rand(0, $width), mt_rand(0, $height), $color);
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}
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for ($i = 0; $i < $line_num; $i++) {
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$color = imagecolorallocate($m_image, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
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imageline($m_image, mt_rand(0, $width), mt_rand(0, $height), mt_rand(0, $width), mt_rand(0, $height), $color);
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}
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// header('content-type: image/png');
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// imagepng($m_image);
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// imagedestroy($m_image);
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ob_start();
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imagepng($m_image);
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imagedestroy($m_image);
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$imagedata = ob_get_contents();
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ob_end_clean();
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$base64 = sprintf('data:image/png;base64,%s', base64_encode($imagedata));
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return [$base64, $m_verify_code];
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}
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public static function getImageCode($uuid)
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{
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list($image, $code) = self::CreateVerifyImage();
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Yii::$app->redis->set('code.image.' . $uuid, $code, 60 * 10);
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$url = explode(',',$image);
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$a = file_put_contents(sprintf(__DIR__.'/../../../home/web/validate_image/%s.png',$uuid), base64_decode($url[1]));
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return $image;
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}
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public static function validateImageCode($uuid, $code)
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{
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$myCode = Yii::$app->redis->get('code.image.' . $uuid);
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Yii::warning($myCode.','.$uuid);
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if ($myCode == $code) return true;
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return false;
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}
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} |