将变量从php传输到js [英] transfer a Variable from php to js

问题描述

当我尝试将变量从php传输到js时，我感到非常困惑. 当我尝试使用id来获取价值时，一切都很好
例如:

I got really confused when i tried to transfer variables from php to js. everything is fine when i try to get value using an id
for example:

var name = $("#name").val();

但是我的问题是，例如，如果要转换此变量:

but my question is, if i want to convert for example this variable:

$id = 182938; //the id of the user

此变量:

var id;

这个问题可能是愚蠢的……也许对您来说很容易，但对我而言却不是:p
我查了一下，只在我要找的地方找到了这样的东西:

this question might be dumb... maybe easy for you, but not for me :p
I have looked it up and only found something like this anywhere i looked for:

<?php
$number = rand();
?>

<script language="javascript">
var num = <?php echo $number ?>
</script>

它与传递值一样有影响吗?

Does it have the same affect as passing down the value?

谢谢！

推荐答案

不太正确.编码为JSON将确保它是有效的JavaScript文字.

Not quite. Encoding as JSON will ensure that it is a valid JavaScript literal.

var num = <?php echo json_encode($number) ?>

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