109 lines
3.3 KiB
PHP
109 lines
3.3 KiB
PHP
<?php
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namespace app\model;
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//验证码类
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class Validate
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{
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private $charset = 'abcdefghkmnprstuvwxyzABCDEFGHKMNPRSTUVWXYZ23456789'; //随机因子
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private $code; //验证码
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private $codelen = 4; //验证码长度
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private $width = 130; //宽度
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private $height = 50; //高度
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private $img; //图形资源句柄
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private $font; //指定的字体
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private $fontsize = 20; //指定字体大小
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private $fontcolor; //指定字体颜色
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//构造方法初始化
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public function __construct()
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{
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$this->font = $_SERVER['DOCUMENT_ROOT'] . '/static/admin/css/fonts/code.ttc';
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}
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//生成随机码
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private function createCode()
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{
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$_len = strlen($this->charset) - 1;
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for ($i = 0; $i < $this->codelen; $i++) {
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$this->code .= $this->charset[mt_rand(0, $_len)];
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}
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}
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//生成背景
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private function createBg()
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{
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$this->img = imagecreatetruecolor($this->width, $this->height);
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$color = imagecolorallocate($this->img, mt_rand(157, 255), mt_rand(157, 255), mt_rand(157, 255));
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imagefilledrectangle($this->img, 0, $this->height, $this->width, 0, $color);
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}
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//生成文字
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private function createFont()
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{
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$_x = $this->width / $this->codelen;
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for ($i = 0; $i < $this->codelen; $i++) {
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$this->fontcolor = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156));
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imagettftext($this->img, $this->fontsize, mt_rand(-30, 30), $_x * $i + mt_rand(1, 5), $this->height / 1.4, $this->fontcolor, $this->font, $this->code[$i]);
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}
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}
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//生成线条、雪花
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private function createLine()
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{
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for ($i = 0; $i < 6; $i++) {
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$color = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156));
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imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $color);
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}
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for ($i = 0; $i < 100; $i++) {
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$color = imagecolorallocate($this->img, mt_rand(200, 255), mt_rand(200, 255), mt_rand(200, 255));
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imagestring($this->img, mt_rand(1, 5), mt_rand(0, $this->width), mt_rand(0, $this->height), '*', $color);
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}
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}
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//对外生成
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public function getImg()
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{
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$this->createBg();
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$this->createCode();
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$this->createLine();
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$this->createFont();
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imagepng($this->img);
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$image_data = ob_get_contents();
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ob_end_clean();
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imagedestroy($this->img);
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return "data:image/png;base64," . base64_encode($image_data);
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}
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//获取验证码
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public function getCode()
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{
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return strtolower($this->code);
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}
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/**
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* 验证图形验证码
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*
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* @return void
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*/
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public function validateImgCode($token, $code)
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{
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if (!$token) {
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return jerr("TOKEN参数丢失");
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}
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if (!$code) {
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return jerr("请输入验证码");
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}
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$code = strtoupper($code);
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$token = $token;
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$_code = cache($token);
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if (!$_code) {
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return jerr("验证码已过期");
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}
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if ($code != $_code) {
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return jerr('验证码错误');
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}
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// 删除设置的缓存
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cache($token, null);
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return null;
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}
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}
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