从JavaScript回声PHP变量? [英] Echo PHP variable from JavaScript?
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问题描述
我的PHP页面上也有一些JavaScript代码,但是下面的JavaScript代码似乎不起作用,或者我可能没有办法了!
我我正在尝试如下所示:
var areaOption = document.getElementById(<?php echo @ $ _ POST ['annonsera_name' ]>?);
areaOption.selected = true;
我也尝试过这种方法,但它仅提醒BLANK警报框:
alert(<?php echo $ test;?>); //我试过用引号,双引号等等......没有运气
我是想在这里完全错误吗?
$ b
更新
一些PHP代码:
<?php
$ test =Hello World!;
?>
解决方案
在第二个例子中,字符串(所以H被解释为一个变量 - 你没有设置)。
测试这个:
alert(<?php echo'H';?>);
OR
alert('<?php echoH;?>');
I have a PHP page with some JavaScript code also, but this JavaScript code below doesn't seem to work, or maybe I'm way off!
I am trying something like this:
var areaOption=document.getElementById("<?php echo @$_POST['annonsera_name']?>");
areaOption.selected=true;
Also I have tried this, but it only alerts a BLANK alert-box:
alert (<?php echo $test;?>); // I have tried this with quotes, double-quotes, etc... no luck
Am I thinking completely wrong here?
UPDATE
Some PHP code:
<?php
$test = "Hello World!";
?>
解决方案
In your second example, you are missing quotes around the string (so H is interpreted as a variable - which you didn't set).
Test this:
alert (<?php echo "'H'";?>);
OR
alert ('<?php echo "H";?>');
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