如何在javascript文件中插入php变量？

Question

My page is available in 3 languages and I'm including in the header of each file (index, contact, etc.) the selected language file (en, ru, pl).

<?php
session_start();
include('language/'.$_SESSION['lang'].'.php');
?>

en.php

<?php
session_start();
$lang = array();

$lang['hello'] = 'Hello';
$lang['world'] = 'World !';
?>

ru.php

<?php
session_start();
$lang = array();

$lang['hello'] = 'привет';
$lang['world'] = 'мир';
?>

And this is how I'm echoing them:

<p><? echo $lang['hello'].' '.$lang['world'];?></p>

This is working actually fine, but I'm having problem with my .js files. If I want to alert or insert some text somewhere I can't.

For example in one of my .js file I have an alert:

if (something_obj.val() == ''){
   alert('Wrong username given !');
   return false;
}

How can I implement language files in my js files? Am I need to create a news .js language file?

Answer 1

You could have one js file per language with translations looking like this:

// german.js
var translations = {
  'hello': 'hallo',
  'world': 'welt'
};

In other JS scripts, just do something like this:

alert(translations['hello'] + " " + translations['world'])

Of course, you might want to choose a shorter variable name than translations.

Then, in your php file, include the correct JS script based on the language:

<script src="languages/<?php echo $_SESSION['lang']; ?>.js"></script>