我在php中有一个数字,即 25
.
然后,我有一个javascript变量,它是一个数字;即 57
.
php 编号是从文本文件中提取的,如下所示:
<!-- NOTE: for this example, the value in file.txt is the number 25 -->
<?php
$the_number = file_get_contents("file.txt");
?>
javascript是这样的:
/* first let's define "$a_variable_from_somewhere_that_is_a_number" so it helps you understand this question: */
var $a_variable_from_somewhere_that_is_a_number = 57;
/* ok and here is the javascript */
var another_number = $a_variable_from_somewhere_that_is_a_number
现在,我想将这两个数字合并到一个 javascript 变量中。
所以我写了这个JavaScript:
var php_number = parseInt(<?= $the_number ?>);
var javascript_number = parseInt(another_number);
var combined_number = php_number + javascript_number;
看看它是否有效:
Did it work? <script type="text/javascript">document.write(combined_number);</script>
我试过了,但值返回为"NaN",这意味着它不起作用。
那么我怎样才能让它工作呢?
更新:
我让它工作了!!我不确定我一开始做错了什么,因为我一直在尝试,直到它奏效。
这是工作代码(这是测试页的全部内容.php):
<?php
$the_number = file_get_contents("count.txt");
?>
PHP Number: <?= $the_number ?>
<script type="text/javascript">
$a_variable_from_somewhere_that_is_a_number = 25;
var another_number = $a_variable_from_somewhere_that_is_a_number
var php_number = parseInt(<?= $the_number ?>);
var javascript_number = parseInt(another_number);
var combined_number = php_number + javascript_number;
</script>
<br /><br />
Did it work? <script type="text/javascript">document.write(combined_number);</script>
由于每个人都想发表评论但不给出实际答案,因此我将在解决后发布我自己问题的答案:
这是工作代码(这是测试页的全部内容.php):
<?php
$the_number = file_get_contents("count.txt");
?>
PHP Number: <?= $the_number ?>
<script type="text/javascript">
$a_variable_from_somewhere_that_is_a_number = 25;
var another_number = $a_variable_from_somewhere_that_is_a_number
var php_number = parseInt(<?= $the_number ?>);
var javascript_number = parseInt(another_number);
var combined_number = php_number + javascript_number;
</script>
<br /><br />
Did it work? <script type="text/javascript">document.write(combined_number);</script>
所以显然可以在javascript中包含php代码。