php调用phantomjs给微信小程序分享

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知识储备

• *unix系统安装phantomjs,权限相关知识

• 基本JavaScript语法知识

• php exec函数调用REPL phantomjs

• phantomjs js截图文档 http://javascript.ruanyifeng....

代码(php 代码环境为yii2框架)

<?php

namespace weapp\library\phantomjs;

use weapp\library\BizException;

class ScreenShot
{
    /** @var string 获取phantomjs 参数中 js文件的决定路径 */
    private $js_path;
    /** @var bool|string 获取php 有777权限的临时文件目录 */
    private $temp_dir;

    function __construct()
    {
        $dir = __DIR__;
        $this->js_path = "{$dir}/script.js";
        /** @var bool|string 获取php 有777权限的临时文件目录 */
        $this->temp_dir = \Yii::getAlias('@runtime');
    }

    /**
     * 截图并上传
     * @param string $url
     * @param string $filename
     * @return string
     * @throws BizException
     */
    public function screenShotThenSaveToOss(string $url, string $filename = 'temp.jpg')
    {
        //

输出图片的路径 $outputFilePath = "{$this->temp_dir}/$filename"; //执行的phantomjs命令 //phantomjs 可执行文件必须是 绝对路径 否则导致 exec 函数返回值127错误 $cmd = "\usr\local\bin\phantomjs {$this->js_path} '$url' '$outputFilePath'"; //捕捉不到phantomjs命令输出结果 exec($cmd, $output); //检查截图文件是否存在 $isShotImgaeExist = file_exists($outputFilePath); if (!$isShotImgaeExist) { throw new BizException(0, 'phantomjs截图失败', BizException::SELF_DEFINE); } //保存截图到oss $result = $this->postScreenShotImageToOss($outputFilePath); //删除临时文件夹的截图图片 unlink($outputFilePath); return $result; } /** * 上传截图到阿里云直传oss * @param string $screenshot_path * @return string */ public function postScreenShotImageToOss(string $screenshot_path): string { $ossKey = 'raw_file_name'; $file = new \CURLFile($screenshot_path, 'image/jpeg', 'file'); $tokenArray = $this->getOssPolicyToken('fetch'); $url = $tokenArray->host; $postData = [ 'key' => "{$tokenArray->dir}/$ossKey", 'policy' => $tokenArray->policy, 'OSSAccessKeyId' => $tokenArray->accessid, 'success_action_status' => '200', 'signature' => $tokenArray->signature, 'callback' => $tokenArray->callback, 'file' => $file ]; $ch = curl_init(); //$data = array('name' => 'Foo', 'file' => '@/home/user/test.png'); curl_setopt($ch, CURLOPT_URL, $url); // Disable SSL verification curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_SAFE_UPLOAD, true); // required as of PHP 5.6.0 curl_setopt($ch, CURLOPT_POSTFIELDS, $postData); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_TIMEOUT, 20); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20); //curl_setopt($ch, CURLOPT_HTTPHEADER, ["Content-Type: $mime_type"]); $res = curl_exec($ch); $res = json_decode($res); curl_close($ch); if (empty($res) || $res->code != 0) { return ''; } else { return $res->data->url; } } /** * 调用管理后台阿里云oss token接口 * @param null $url * @return array */ public function getOssPolicyToken($url = null) { $url = \Yii::$app->params['oss_screen_shot_token_api']; $ch = curl_init(); // Disable SSL verification curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // Will return the response, if false it print the response curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // Set the url curl_setopt($ch, CURLOPT_URL, $url); // Execute $result = curl_exec($ch); // Closing curl_close($ch); $res = json_decode($result); if (empty($res) || $res->code != 0) { return []; } else { return $res->data; } } }

phantomjs javascript脚本内容

"use strict";
var system = require('system');
var webPage = require('webpage');
var page = webPage.create();
//设置phantomjs的浏览器user-agent
page.settings.userAgent = 'Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) Version/11.0 Mobile/15A372 Safari/604.1';

//获取php exec 函数的命令行参数
if (system.args.length !== 3) {
    console.log(system.args);
    console.log('参数错误');
    console.log('第2个参数为url地址 第3个参数为截图文件名称');
    phantom.exit(1);
}

//命令行 截图网址参数
var url = system.args[1];
//图片

输出路径 var filePath = system.args[2]; console.log('-------'); console.log(url); console.log('-------'); console.log(filePath); console.log('-------'); //设置浏览器视口 page.viewportSize = {width: 480, height: 960}; //打开网址 page.open(url, function start(status) { //1000ms之后开始截图 setTimeout(function () { //截图格式为jpg 80%的图片质量 page.render(filePath, {format: 'jpg', quality: '80'}); console.log('success'); //退出phantomjs 避免phantomjs导致内存泄露 phantom.exit(); }, 1000); });

php调用phantomjs目录结构

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