Get PHP variable to javascript

I cant seem to find the answer for this one. I need to grab a PHP variable and insert it into javascript.

Here is an example of what I have in the body of a PHP page:

<script type="text/javascript">
$(document).ready(function(){
    $('#button').click(function() { 
        var info = "<?php Print($info); ?>";
        $.post($("#frm1").attr("action"), $("#frm1").serialize(), function () {
        alert(info);
        });
    });   
});
</script>

<?php
    $info="some info";
?>
<form  id="frm1" method="post" action="somepage.php">
<input name="Text1" type="text" />
<input id="button" type="submit" value="submit" />
</form>

So the problem is that the alert pops up but doesn't echo the $info string. Obviously i'm missing the right way to grab a PHP variable. Please help.

---

If the php variable is visible inside the inner HTML, you could do something like this to grab the variable:

HTML:

<span class="variable-content"><?php echo $variable; ?></span>

jQuery:

var php_variable = $(".variable-content").text();
alert(php_variable);

---

Change:

alert(info);

to:

alert('<?php echo "some info"; ?>');

---

It looks to me like you are declaring the variable after you use it. So there is nothing in $info.

try:

<?php
        $info="some info";
    ?>
        <script type="text/javascript">
    $(document).ready(function(){
        $('#button').click(function() { 
            var info = "<?php echo $info; ?>";
            $.post($("#frm1").attr("action"), $("#frm1").serialize(), function () {
            alert(info);
            });
        });   
    });
    </script>


    <form  id="frm1" method="post" action="somepage.php">
    <input name="Text1" type="text" />
    <input id="button" type="submit" value="submit" />
    </form>

链接地址: http://www.djcxy.com/p/59354.html

上一篇: 将域URL添加到href和src相对路径

下一篇: 获取PHP变量为JavaScript