如何在jQuery/JavaScript中正确插入PHP变量?

问题描述：

此代码在运行应用程序时有效，但是Dreamweaver给出了语法错误.它不喜欢那里的问号.我希望DW不会出现语法错误.有另一种写方法吗?我有DW cs5.5，我无法升级Dreamweaver版本.

This code works when running the application, but Dreamweaver is giving a syntax error. It doesn't like the question mark there. I like DW to be syntax error free. Is there a different way to write this? I have DW cs5.5 I can't upgrade Dreamweaver version.

    if ( $('#postage6').val() == "Your Permit Standard" ) {
        $('#postage6rate').val('<?php echo $your_permit_standard; ?>');
    }

在问号前加上反斜杠只会使它像这样打印，这是不正确的.

Putting a backslash before the question mark just makes it print like this, which is not right.

    if ( $('#postage6').val() == "Your Permit Standard" ) {
        $('#postage6rate').val('<\?php echo $your_permit_standard; ?>');
    }

当渲染时，应该有一个像这样的值:

when it renders, there is supposed to be a value like this:

    if ( $('#postage6').val() == "Your Permit Standard" ) {
        $('#postage6rate').val('0.333');
    }

这也不起作用:

    if ( $('#postage6').val() == "Your Permit Standard" ) {
        var somevar = "<?php echo $your_permit_standard; ?>";
        $('#postage6rate').val(somevar);
    }

语法错误只是从PHP变量所在的行转移到PHP变量所在的新行.

The syntax error just transfers from the line where the PHP variable was to the new line where the PHP variable is.

答

您可以在单独的php块中定义值:

You could define the value in a separate php block:

<script type="text/javascript">
   var value = '<?=$your_permit_standard?>';
</script>

然后在您的JS中使用它:

And then use it in your JS:

if ( $('#postage6').val() == "Your Permit Standard" ) {
    $('#postage6rate').val(value);
}

但是随后您将在PHP中引入JS依赖关系，我不建议这样做，但是由于您仍然将两者混合在一起...

But then you would be introducing JS dependency in PHP, which I wouldn't recommend, but since you're mixing both anyway...

如何在jQuery/JavaScript中正确插入PHP变量?

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