[英]How to combine a javascript value with a php value to a single javascript variable?
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编号是从这样的文本文件中提取的:
<!-- NOTE: for this example, the value in file.txt is the number 25 -->
<?php
$the_number = file_get_contents("file.txt");
?>
和JavaScript是这样的:
/* first let's define "$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为一个javascript变量。
所以我写这个JavaScript:
var php_number = parseInt(<?= $the_number ?>);
var javascript_number = parseInt(another_number);
var combined_number = php_number + javascript_number;
并查看它是否有效:
Did it work? <script type="text/javascript">document.write(combined_number);</script>
我尝试过,但是该值返回为“ NaN”,这意味着它没有用。
那么我怎样才能使它工作呢?
更新:
我知道了!! 我不确定一开始我做错了什么,因为我一直尝试尝试直到可行。
这是工作代码(这是test-page.php的全部内容) :
<?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提供实际答案,因此我将在解决后将其发布到我自己的问题中:
这是工作代码(这是test-page.php的全部内容) :
<?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>
因此,显然可以在 javascript中包含php代码。
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