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通过发送变量在php中执行helc.pl文件(exec hello.pl file in php by sending variable)

 我有一个文件hello.pl，我想在php中调用。 我使用了exec（perl perl_tests \ hello.pl）和我  
 想把变量发送到这个pl文件你能给我建议吗？ 

I have a file hello.pl and i want to call in php. I used exec(perl perl_tests\hello.pl) and I  
want to send variables in to this pl file can you give me advice?

原文：https://stackoverflow.com/questions/21452104

更新时间：2021-11-19 20:11

最满意答案

 你真的很接近，唯一的问题是变量的内部，即#{this_stuff} 都是在jade的上下文中执行的（没有google对象，因为这是客户端）。  
 这有点棘手，因为你在这里处理两个完全不同的javascript环境： 服务器端和客户端 。  
 因此，您需要在您的jade中输出服务器端变量，将其转换为将在客户端执行的javascript代码。  
 在相关的说明中，您可以在脚本块中使用Jade变量语法，但不能执行其他操作（如循环）。  
 首先，让我们清理它，以便所有script标记都在js块中（假设您使用的示例KeystoneJS模板将位于<body>标记的底部）并正确生成这些配置文件：  
block js
    script(src='https://maps.googleapis.com/maps/api/js?key=<GOOGLE_API_KEY>&sensor=false')
    script.
        var map;
        function initialize() {
            var mapOptions = {
                center: new google.maps.LatLng(51.0360272, 3.7359072),
                zoom: 8
            };
            map = new google.maps.Map(document.getElementById("map-canvas"),
                mapOptions);
        }

        google.maps.event.addDomListener(window, 'load', initialise);

    if data.profiles
        each profile in data.profiles
            script.
                new google.maps.Marker({
                    position: new google.maps.LatLng(#{profile.address.geo[1]}, #{profile.address.geo[0]}),
                    map: map,
                    title: "#{profile.name.full}"
                });

block content
   .container
        div(id="map-canvas", style="width:100%; height:700px;")
 
 这种情况越来越近了（Jade会产生你现在所期望的），但是它还不会工作（因为你可能在initialize函数运行之前将标记添加到地图中）。  
 它也没有逃避值，所以像名称中的"字符"会导致语法错误。  
 一种更健壮的方法是填充客户端数组，然后在创建映射后循环遍历该数组。 我们还将使用JSON.stringify来确保正确转义值。  
block js
    script(src='https://maps.googleapis.com/maps/api/js?key=<GOOGLE_API_KEY>&sensor=false')
    script.
        var map,
            profiles = [];

        function initialize() {
            var mapOptions = {
                center: new google.maps.LatLng(51.0360272, 3.7359072),
                zoom: 8
            };
            map = new google.maps.Map(document.getElementById("map-canvas"),
                mapOptions);

            for (var i = 0; i < profiles.length; i++) {
                new google.maps.Marker({
                    position: new google.maps.LatLng(profiles[i].geo[1], profiles[i].geo[0]),
                    map: map,
                    title: profiles[i].name
                });
            }
        }

        google.maps.event.addDomListener(window, 'load', initialise);

    if data.profiles
        each profile in data.profiles
            script.
                profiles.push({
                    geo: !{JSON.stringify(profile.address.geo)},
                    name: !{JSON.stringify(profile.name.full)}
                });

block content
   .container
        div(id="map-canvas", style="width:100%; height:700px;")
 
 请注意对！{variable}的更改，以便不转义JSON  
 最后，我建议在路径.js文件中为视图构建profiles数组，而不是在jade模板中进行。 它更清洁，你不会在你的页面中找到大量的<script>标签。  
 所以你的路线看起来像这样（我假设有一点点给你的想法，并使用下划线使代码比vanilla javascript更整洁）  
var keystone = require('keystone'),
    _ = require('underscore');

exports = module.exports = function(req, res) {

    var view = new keystone.View(req, res),
        locals = res.locals;

    // Load the profiles
    view.query('profiles', keystone.list('Profile').model.find());

    // Create the array of profile markers
    view.on('render', function(next) {
        locals.profileMarkers = locals.profiles ? _.map(locals.profiles, function(profile) {
            return { geo: profile.address.geo, name: profile.name.full };
        }) : [];
        next();
    });

    // Render the view
    view.render('profiles');

}
 
 然后在您的视图模板中：  
block js
    script(src='https://maps.googleapis.com/maps/api/js?key=<GOOGLE_API_KEY>&sensor=false')
    script.
        var profileMarkers = !{JSON.stringify(profileMarkers)},
            map;

        function initialize() {
            var mapOptions = {
                center: new google.maps.LatLng(51.0360272, 3.7359072),
                zoom: 8
            };
            map = new google.maps.Map(document.getElementById("map-canvas"),
                mapOptions);

            _.each(profileMarkers, function(profile) {
                new google.maps.Marker({
                    position: new google.maps.LatLng(profile.geo[1], profile.geo[0]),
                    map: map,
                    title: profile.name
                });
            });
        }

        google.maps.event.addDomListener(window, 'load', initialise);

block content
   .container
        div(id="map-canvas", style="width:100%; height:700px;")

You're really close, the only problem is that the inside of the variable, i.e. #{this_stuff} is all executed in jade's context (which won't have the google object, as this is client-side). 
It's a bit tricky because you're dealing with two completely different javascript environments here: server side and client side. 
So you need to output server-side variables in your jade, into javascript code that will be executed client-side. 
On a related note, you can use Jade variable syntax in script blocks, but can't do other things (like loops). 
Firstly, let's clean it up so all your script tags are in the js block (which, assuming you're using the example KeystoneJS templates would be down the bottom of the <body> tag) and get those profiles being generated correctly: 
block js
    script(src='https://maps.googleapis.com/maps/api/js?key=<GOOGLE_API_KEY>&sensor=false')
    script.
        var map;
        function initialize() {
            var mapOptions = {
                center: new google.maps.LatLng(51.0360272, 3.7359072),
                zoom: 8
            };
            map = new google.maps.Map(document.getElementById("map-canvas"),
                mapOptions);
        }

        google.maps.event.addDomListener(window, 'load', initialise);

    if data.profiles
        each profile in data.profiles
            script.
                new google.maps.Marker({
                    position: new google.maps.LatLng(#{profile.address.geo[1]}, #{profile.address.geo[0]}),
                    map: map,
                    title: "#{profile.name.full}"
                });

block content
   .container
        div(id="map-canvas", style="width:100%; height:700px;")
 
This is getting closer (and the Jade will generate what you're expecting now), but it won't work (yet) because you're potentially adding the markers to the map before the initialize function has run. 
It's also not escaping the values, so things like a " character in the name would cause a syntax error. 
A more robust way of doing it would be to populate a client-side array then loop over that after the map has been created. We'll also use JSON.stringify to make sure the values are escaped properly. 
block js
    script(src='https://maps.googleapis.com/maps/api/js?key=<GOOGLE_API_KEY>&sensor=false')
    script.
        var map,
            profiles = [];

        function initialize() {
            var mapOptions = {
                center: new google.maps.LatLng(51.0360272, 3.7359072),
                zoom: 8
            };
            map = new google.maps.Map(document.getElementById("map-canvas"),
                mapOptions);

            for (var i = 0; i < profiles.length; i++) {
                new google.maps.Marker({
                    position: new google.maps.LatLng(profiles[i].geo[1], profiles[i].geo[0]),
                    map: map,
                    title: profiles[i].name
                });
            }
        }

        google.maps.event.addDomListener(window, 'load', initialise);

    if data.profiles
        each profile in data.profiles
            script.
                profiles.push({
                    geo: !{JSON.stringify(profile.address.geo)},
                    name: !{JSON.stringify(profile.name.full)}
                });

block content
   .container
        div(id="map-canvas", style="width:100%; height:700px;")
 
Note the change to !{variable} so the JSON isn't escaped 
Finally, I'd recommend building up the profiles array in your route .js file for the view, rather than doing it in the jade template. It's a lot cleaner, and you won't end up with heaps of <script> tags in your page. 
So your route would look something like this (I am assuming a fair bit to give you the idea, and using underscore to make the code neater than vanilla javascript) 
var keystone = require('keystone'),
    _ = require('underscore');

exports = module.exports = function(req, res) {

    var view = new keystone.View(req, res),
        locals = res.locals;

    // Load the profiles
    view.query('profiles', keystone.list('Profile').model.find());

    // Create the array of profile markers
    view.on('render', function(next) {
        locals.profileMarkers = locals.profiles ? _.map(locals.profiles, function(profile) {
            return { geo: profile.address.geo, name: profile.name.full };
        }) : [];
        next();
    });

    // Render the view
    view.render('profiles');

}
 
Then in your view template: 
block js
    script(src='https://maps.googleapis.com/maps/api/js?key=<GOOGLE_API_KEY>&sensor=false')
    script.
        var profileMarkers = !{JSON.stringify(profileMarkers)},
            map;

        function initialize() {
            var mapOptions = {
                center: new google.maps.LatLng(51.0360272, 3.7359072),
                zoom: 8
            };
            map = new google.maps.Map(document.getElementById("map-canvas"),
                mapOptions);

            _.each(profileMarkers, function(profile) {
                new google.maps.Marker({
                    position: new google.maps.LatLng(profile.geo[1], profile.geo[0]),
                    map: map,
                    title: profile.name
                });
            });
        }

        google.maps.event.addDomListener(window, 'load', initialise);

block content
   .container
        div(id="map-canvas", style="width:100%; height:700px;")

通过发送变量在php中执行helc.pl文件(exec hello.pl file in php by sending variable)

最满意答案

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