这篇文章主要介绍了关于关于php如何调用phantomjs给微信小程序分享的问题，有着一定的参考价值，现在分享给大家，有需要的朋友可以参考一下
背景
CTO不让我使用golang所以只好使用php调用phantomjs
packagist上的composer包功能很冗余,我只需要用到phantomjs的截图功能
知识储备
*unix系统安装phantomjs,权限相关知识
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基本JavaScript语法知识
立即学习“PHP免费学习笔记（深入）”；
php
exec函数调用REPLphantomjsphantomjs 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
![3184207835-5b28e6f5859bb_articlex[1].png](https://img.php.cn//upload/image/407/628/800/1531204528253690.png "1531204528253690.png")
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