微信分享包括获取分享二维码，分享到好友，分享到朋友圈。获取分享二维码只需要后端将生成的二维码地址传递给前端即可；分享到好友是前端程序员的任务，不需要后端操作
生成微信二维码
<?php
use Tools\CurlService;
use Tools\WxAccessToken;
define('APP_ID', '12345');
define('APP_SECRET','56789');
class ShareService
{
/**
* @param $code string 链接参数
* @param $title string 主体文字
* @param $productImg string 主体图片
* @return array
*/
public function wxShareImg($code, $title, $productImg)
{
$result = [
'success' => true,
'message' => '',
'url' => '',
];
if (empty($title) || empty($productImg)) {
$result['success'] = false;
$result['message'] = '参数缺失';
return $result;
}
WxAccessToken::init(APP_ID, APP_SECRET);
$token = WxAccessToken::getAccessToken();
// 二维码链接
$path = 'packageC/pages/goodsDetail/goodsDetail?code=' . $code;
// 小程序图片
$buildQcodoRes = $this->createWxaCode($path, $token);
if (false === $buildQcodoRes['success']) {
return $buildQcodoRes;
}
$path = 'data/upload/productShare/' . date('ymd') . '/qrcode/';
$file = $path . uniqid() . '.jpeg';
$qrCodePath = $this->getSaveFile($buildQcodoRes['data'],$path,$file);
if (empty($qrCodePath)) {
$result['success'] = false;
$result['message'] = '图片获取失败';
return $result;
}
// 背景图
$bgImgPath = 'data/upload/productShare/background/sharemerchantbg.jpg';
$shareStream = $this->createShareImage($bgImgPath, $qrCodePath, $productImg, $title);
if(empty($shareStream)){
$result['success'] = false;
$result['message'] = '图片获取失败';
return $result;
}
$path = 'data/upload/productShare/' . date('ymd') . '/shareImg/';
$file = $path . uniqid() . '.jpeg';
$shareUrl = $this->getSaveFile($shareStream,$path,$file);
$result['url'] = $shareUrl;
@unlink($qrCodePath);
return $result;
}
/**
* 小程序图片
* @param string $path 跳转地址
* @param string $accessToken 微信token
* @param int $width 二维码宽度
* @return array
*/
private function createWxaCode($path = '', $accessToken = '', $width = 200)
{
$url = "https://api.weixin.qq.com/wxa/getwxacode?access_token=$accessToken";
$result = [
'success' => true,
'data' => '',
'msg' => ''
];
$data = [
'path' => $path,
'width' => $width,
];
$resource = CurlService::callWebServer($data, $url, 'POST');
if (false == $resource['status']) {
$result['success'] = false;
$result['msg'] = $resource['msg'];
return $result;
}
if(isset($resource['data']['errcode'])){
$result['success'] = false;
$result['msg'] = $resource['data']['errmsg'];
return $result;
}
$result['data'] = $resource['data'];
return $result;
}
/**
* 创建分享商品图片
* @param $bgImgPath string 背景图片
* @param $qrCodePath string 二维码图片
* @param $title string 主题文字
* @param $productImgPath string 主体图片
* @return string
*/
private function createShareImage($bgImgPath, $qrCodePath, $productImgPath, $title)
{
//打开背景图
//判断图片资源类型并创建对应图片资源
$info = getimagesize($bgImgPath);
if(!empty($info)){
switch ($info[2]) {
case 1:
$image = imagecreatefromgif($bgImgPath);
break;
case 2:
$image = imagecreatefromjpeg($bgImgPath);
break;
case 3:
default:
$image = imagecreatefrompng($bgImgPath);
break;
}
}else{
$res = $this->getUrl($bgImgPath);
if (false == $res)
return false;
$image = imagecreatefromstring($res);
}
//定义画笔颜色
$gray = imagecolorallocate($image, 153, 153, 153);
$pink = imagecolorallocate($image, 205, 66, 61);
//imagefill($image,0,0,$white);//为画布填充背景颜色
//输出文字(文件必须为绝对路径)
$font = APP_PATH . '../public/font/HiraginoSansGB-W3.otf';
//输出字符到背景图
$title = $this->handleTitle($title);
ImageTTFText($image, 25, 0, 400, 650, $pink, $font, $title);
ImageTTFText($image, 25, 0, 400, 700, $gray, $font, '长按识别小程序');
//添加商品图片
$productWidth = 750;
$productHeight = 360;
$productImg = $this->scaleImage($productImgPath, $productWidth, $productHeight);
if (false == $productImg) {
imagedestroy($image);
return false;
}
imagecopymerge($image, $productImg, 0, 120, 0, 0, $productWidth, $productHeight, 100);
//添加二维码图片
$qrWidth = 220;
$qrImage = $this->scaleImage($qrCodePath, $qrWidth);
if (false == $qrImage) {
imagedestroy($image);
imagedestroy($productImg);
return false;
}
imagecopymerge($image, $qrImage, 130, 550, 0, 0, 220, 220, 100);
// 生成圆角图片
// $image = $this->radiusImg($image,750,820);
//输出图片字节流
ob_end_clean();
ob_start();
imagepng($image);
$imgStream = ob_get_contents();
ob_end_clean();
//销毁图像释放资源
imagedestroy($productImg);
imagedestroy($qrImage);
return $imgStream;
}
/**
* 生成圆角图片
* @param source $src_img 原图资源
* @param $width
* @param $height
* @param int $radius
* @return false|resource
*/
private function radiusImg($src_img, $width, $height, $radius = 15)
{
$w = &$width;
$h = &$height;
// $radius = $radius == 0 ? (min($w, $h) / 2) : $radius;
$img = imagecreatetruecolor($w, $h);
imagesavealpha($img, true);
//拾取一个完全透明的颜色,最后一个参数127为全透明
$bg = imagecolorallocatealpha($img, 255, 255, 255, 127);
imagefill($img, 0, 0, $bg);
$r = $radius; //圆 角半径
for ($x = 0; $x < $w; $x++) {
for ($y = 0; $y < $h; $y++) {
$rgbColor = imagecolorat($src_img, $x, $y);
if (($x >= $radius && $x <= ($w - $radius)) || ($y >= $radius && $y <= ($h - $radius))) {
//不在四角的范围内,直接画
imagesetpixel($img, $x, $y, $rgbColor);
} else {
//在四角的范围内选择画
//上左
$y_x = $r; //圆心X坐标
$y_y = $r; //圆心Y坐标
if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
imagesetpixel($img, $x, $y, $rgbColor);
}
//上右
$y_x = $w - $r; //圆心X坐标
$y_y = $r; //圆心Y坐标
if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
imagesetpixel($img, $x, $y, $rgbColor);
}
//下左
$y_x = $r; //圆心X坐标
$y_y = $h - $r; //圆心Y坐标
if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
imagesetpixel($img, $x, $y, $rgbColor);
}
//下右
$y_x = $w - $r; //圆心X坐标
$y_y = $h - $r; //圆心Y坐标
if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
imagesetpixel($img, $x, $y, $rgbColor);
}
}
}
}
return $img;
}
/**
* 固定图片的长宽
* @param $path
* @param $needWidth
* @param string $needHeight
* @return false|resource
*/
private function scaleImage($path, $needWidth, $needHeight = '')
{
//判断图片资源类型并创建对应图片资源
//获取图片的基本信息
$info = getimagesize($path);
if(!empty($info)){
switch ($info[2]){
case 1:
$image = imagecreatefromgif($path);
break;
case 2:
$image = imagecreatefromjpeg($path);
break;
case 3:
default:
$image = imagecreatefrompng($path);
break;
}
}else{
$res = $this->getUrl($path);
if (false == $res)
return false;
//判断图片资源类型并创建对应图片资源
//获取图片的基本信息
$image = imagecreatefromstring($res);
$info = [imagesx($image), imagesy($image)];
}
//获取宽度
$width = $info[0];
//获取高度
$height = $info[1];
if ($needHeight) {
$newImage = imagecreatetruecolor($needWidth, $needHeight);
$sWidth = $needWidth;
$sHeight = $needHeight;
} else {
//计算缩放比例
$scale = ($needWidth / $width) > ($needWidth / $height) ? $needWidth / $height : $needWidth / $width;
//计算缩放后的尺寸
$sWidth = floor($width * $scale);
$sHeight = floor($height * $scale);
//创建目标图像资源
$newImage = imagecreatetruecolor($sWidth, $sHeight);
}
imagecopyresampled($newImage, $image, 0, 0, 0, 0, $sWidth, $sHeight, $width, $height);
imagedestroy($image);
return $newImage;
}
/**
* 商品名称长度限制
* @param $title
* @return false|string
*/
private function handleTitle($title)
{
if (mb_strlen($title) > 10) {
$title = mb_substr($title, 0, 10);
$title .= '...';
}
return $title;
}
private function getUrl($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($ch);
curl_close($ch);
return $output;
}
private function getSaveFile($resource,$dir = '',$saveName = ''){
if(empty($resource)){
return false;
}
if(empty($dir)){
$dir = 'upload/'.date('Y-m-d').'/';
}
if(!file_exists($dir)){
mkdir($dir,true,0755);
}
if(empty($saveName)){
$saveName = uniqid().'.png';
}
$boolean = file_put_contents($dir.$saveName,$resource);
return $boolean ? $dir. $saveName : false;
}
}使用
use Tools\WxShareService;
$code = '';
$title = '';
$productImg = '';
$res = WxShareService::wxShareImg($code,$title,$productImg);