227 lines
6.1 KiB
PHP
227 lines
6.1 KiB
PHP
<?php
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/**
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* Created by dh2y.
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* Date: 2018/8/8 14:38
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* for: 二维码生成
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*/
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namespace dh2y\qrcode;
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use think\Exception;
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use think\facade\Config;
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use think\facade\Request;
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class QRcode
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{
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protected $config = []; //相关配置
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protected $cache_dir = ''; //二维码缓存
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protected $outfile = ''; //输出二维码文件
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protected $error = ''; //错误信息
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public function __construct(){
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$this->config= Config::get('qrcode.');
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if(isset($this->config['cache_dir'])&&$this->config['cache_dir']!=''){
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$this->cache_dir = $this->config['cache_dir'];
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}else{
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$this->cache_dir = 'uploads/qrcode';
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}
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if (!file_exists($this->cache_dir)){
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mkdir ($this->cache_dir,0775,true);
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}
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require("phpqrcode/qrlib.php");
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}
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/**
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* 生成普通二维码
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* @param string $url 生成url地址
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* @param bool $outfile
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* @param int $size
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* @param string $evel
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* @return $this
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*/
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public function png($url,$outfile=false,$size=5,$evel='H'){
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if(!$outfile){
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$outfile = $this->cache_dir.'/'.time().'.png';
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}
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$this->outfile = $outfile;
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\QRcode::png($url,$outfile,$evel,$size,2);
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return $this;
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}
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/**
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* 显示二维码
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*/
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public function show(){
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$url = Request::instance()->domain().'/'.$this->outfile;
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exit('<img src="'.$url.'"/>');
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}
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/**
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* 返回url路径
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* @return string
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*/
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public function entry(){
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return Request::instance()->domain().'/'.$this->outfile;
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}
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/**
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* 返回生成二维码的相对路径
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* @param bool $ds
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* @return string
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*/
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public function getPath($ds=true){
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if($ds){
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return '/'.$this->outfile;
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}else{
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return $this->outfile;
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}
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}
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/**
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* 销毁内容
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*/
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public function destroy(){
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@unlink($this->outfile);
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}
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/**
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* 添加logo到二维码中
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* @param $logo
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* @return bool|mixed
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*/
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public function logo($logo){
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if (!isset($logo)||$logo=='') {
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$this->error = 'logo不存在';
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return false;
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}
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$QR = imagecreatefromstring(file_get_contents($this->outfile));
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$logo = imagecreatefromstring(file_get_contents($logo));
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$QR_width = imagesx($QR);//二维码图片宽度
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$QR_height = imagesy($QR);//二维码图片高度
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$logo_width = imagesx($logo);//logo图片宽度
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$logo_height = imagesy($logo);//logo图片高度
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$logo_qr_width = $QR_width / 5;
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$scale = $logo_width/$logo_qr_width;
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$logo_qr_height = $logo_height/$scale;
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$from_width = ($QR_width - $logo_qr_width) / 2;
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//重新组合图片并调整大小
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imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
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$this->outfile = $this->cache_dir.'/'.time().'.png';
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imagepng($QR, $this->outfile);
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imagedestroy($QR);
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return $this;
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}
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/**
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* 添加背景图
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* @param int $x 二维码在背景图X轴未知
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* @param int $y 二维码在背景图Y轴未知
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* @param string $dst_path
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* @return $this
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*/
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public function background($x=200,$y=500,$dst_path = ''){
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if($dst_path==''){
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$dst_path = $this->config['background'];
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}
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$src_path = $this->outfile;//覆盖图
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//创建图片的实例
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$dst = imagecreatefromstring(file_get_contents($dst_path));
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$src = imagecreatefromstring(file_get_contents($src_path));
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//获取覆盖图图片的宽高
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list($src_w, $src_h) = getimagesize($src_path);
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//将覆盖图复制到目标图片上，最后个参数100是设置透明度（100是不透明），这里实现不透明效果
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imagecopymerge($dst, $src, $x, $y, 0, 0, $src_w, $src_h, 100);
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$this->outfile = $this->cache_dir.'/'.time().'.png';
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imagepng($dst, $this->outfile);//根据需要生成相应的图片
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imagedestroy($dst);
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return $this;
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}
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public function text($text,$size,$locate =[],$color = '#00000000',$font='simsun.ttc', $offset = 0, $angle = 0) {
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$dst_path = $this->outfile;
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//创建图片的实例
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$dst = imagecreatefromstring(file_get_contents($dst_path));
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/* 设置颜色 */
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if (is_string($color) && 0 === strpos($color, '#')) {
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$color = str_split(substr($color, 1), 2);
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$color = array_map('hexdec', $color);
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if (empty($color[3]) || $color[3] > 127) {
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$color[3] = 0;
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}
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} elseif (!is_array($color)) {
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throw new Exception('错误的颜色值');
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}
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//如果字体不存在 用composer项目自己的字体
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if(!is_file($font)){
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$font = dirname(__FILE__).'/'.$font;
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}
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//获取文字信息
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$info = imagettfbbox($size, $angle, $font, $text);
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$minx = min($info[0], $info[2], $info[4], $info[6]);
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$maxx = max($info[0], $info[2], $info[4], $info[6]);
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$miny = min($info[1], $info[3], $info[5], $info[7]);
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$maxy = max($info[1], $info[3], $info[5], $info[7]);
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/* 计算文字初始坐标和尺寸 */
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$x = $minx;
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$y = abs($miny);
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$w = $maxx - $minx;
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$h = $maxy - $miny;
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//背景图信息
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list($dst_w, $dst_h) = getimagesize($dst_path);
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if (is_array($locate)) {
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list($posx, $posy) = $locate;
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$x += ($posx=='center')?(($dst_w - $w) / 2):$posx;
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$y += ($posy=='center')?(($dst_h - $h) / 2):$posy;
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} else {
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throw new Exception('不支持的文字位置类型');
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}
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//字体颜色
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$black = imagecolorallocate($dst, $color[0], $color[1], $color[2]);
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//加入文字
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imagefttext($dst, $size, $angle, $x, $y, $black,$font, $text);
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//生成图片
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$this->outfile = $this->cache_dir.'/'.time().'.png';
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imagepng($dst, $this->outfile);
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imagedestroy($dst);
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return $this;
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}
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} |