如何从外部PHP文件中获取字符串并将其设置为JavaScript中的var
[英]How to get a string from external PHP file and set it as var in JavaScript
问题描述
I thought this would be simple enough, but I can't get it to work. 
我认为这很简单，但我无法让它发挥作用。
I have two files. 我有两个文件。 main.html and data.php The two files are in the same folder on a server. main.html和data.php这两个文件位于服务器上的同一文件夹中。
I want to get a string from the PHP file and use it in jQuery. 我想从PHP文件中获取一个字符串并在jQuery中使用它。 In the example below, I want the browser to create a pop-up, with the text "xxxx". 在下面的示例中，我希望浏览器创建一个弹出窗口，文本为“xxxx”。 I get no pop-up. 我没有弹出窗口。
data.php
<?php
$var = "xxxx";
echo json_encode($var);
?>
main.html
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="scripts/jquery-1.11.1.js"></script>
<script>
$(document).ready(function() {
var testString = <?php $var = json_decode(file_get_contents('data.php'), true); echo $var; ?>;
alert(testString);
});
</script>
</head>
<body>
<h1>Test</h1>
</body>
</html>
Any takers? 任何接受者？
3 个解决方案
解决方案1
2 已采纳 2014-10-31 05:31:43
<!DOCTYPE html>
<html>
<head>
<script>
$(document).ready(function() {
$.ajax({
url:"data.php",
success:function(result){
alert(result);
}
});
});
</script>
</head>
<body>
<h1>Test</h1>
</body>
</html>
解决方案2
1 2014-10-31 05:36:39
The first problem with this is that on many servers .html is not parsed for PHP 第一个问题是在许多服务器上.html没有为PHP解析
The second problem is that the file_get_contents will actually display the full contents of your .php file (including the <?php ) which is likely not what you're looking for. 第二个问题是file_get_contents实际上会显示你的.php文件的全部内容（包括<?php ），这可能不是你想要的。
Instead I would use an AJAX request such as http://api.jquery.com/jquery.get/ 相反，我会使用一个AJAX请求，如http://api.jquery.com/jquery.get/
For this you will need to include jQuery in your <head> 为此，您需要在<head>包含jQuery
解决方案3
0 2014-10-31 06:02:41
You should get the php data before html initiates, like below 您应该在html启动之前获取php数据，如下所示
<?php
$var = json_decode(file_get_contents('data.php'), true);
?>
<!DOCTYPE html>
<html>
<head>
<script>
$(document).ready(function() {
var testString = <?php echo $var; ?>;
alert(testString);
});
</script>
</head>
<body>
<h1>Test</h1>
</body>
</html>
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