如何在 php 中使用 javascript 代码？
[英]How can I use javascript code with php?
问题描述
What am I doing ?
我在做什么？
I have a dynamically created html division containing the score of a game played by user which user can share on social media.我有一个dynamically created html division其中包含用户可以在社交媒体上分享的用户玩游戏的分数。
For sharing I have meta tag eg facebook为了分享，我有元标签，例如 facebook
<meta property="og:image" content= "<?php echo $img_url; ?>"/>
Where $img_url is the link of the screenshot of dynamically created html division .其中$img_url是dynamically created html division截图的链接。
test.php -- where my above mentioned meta tag is placed and I want to take screenshot of html div if $img_url is not set. test.php——我上面提到的元标记所在的位置，如果未设置$img_url ，我想截取html div屏幕截图。
<?php session_start(); $img_url = $_POST['img_url']; if(!isset($url)) { /* <script> function capture() { html2canvas will give var img. Which will be POSTED to testsave.php to save it in the server. } </script> */ } ?> <html> <!--dynamically created html division --> </html> testsave.php -- which will take the posted value from test.php and save the screenshot image to server and will send back the $img_url to test.php testsave.php -- 它将从test.php获取发布的值并将屏幕截图图像保存到服务器，并将$img_url发送回test.php
<?php session_start(); /*Get the base-64 string from data Decode the string Save the image function predefined for random string*/ $img_url = $random_str.".png"; file_put_contents($img_url, $unencodedData); $_SESSION['img_url'] = $img_url ; ?>
What my problem is ?我的问题是什么？
When facebook scrapes a paricular page , it doesn't take session values or any values from other page.当 facebook 抓取特定页面时，它不会从其他页面获取session values或任何值。 So I can't send img_val from testsave.php to another page because scraper won't read POSTED values.所以我不能将img_val从 testsave.php 发送到另一个页面，因为刮板不会读取POSTED值。
So, what am I doing is when scraper will scrape test.php then if $img_val is not set I want my code to take the screenshot and post js variable var img to testsave.php to save the image, which will then post back the value of $img_val to test.php .所以，我在做什么是当刮板刮test.php然后如果$img_val没有设置我希望我的代码截取屏幕截图并将js变量var img到testsave.php以保存图像，然后将回发$img_val到test.php值。
I know there may be many mistakes in above code like I can't put js inside php .我知道上面的代码可能有很多错误，比如我不能把js放在php 。 But I tried it many way but couldn't figure it out.但是我尝试了很多方法，但无法弄清楚。
Can you please suggest what can I do to make the code work or can you suggest any other way to do it ?您能否建议我该怎么做才能使代码正常工作，或者您可以建议任何其他方法吗？
3 个解决方案
解决方案1
1 2016-10-18 07:43:45
You have to echo out HTML from PHP你必须从 PHP 中回显 HTML
<?php
session_start();
$img_url = $_POST['img_url'];
if(!isset($url)) {
echo "<script>
function capture() {
//your js code here
}
</script>";
}
?>
<html>
<!--dynamically created html division -->
</html>
解决方案2
1 2019-02-18 14:33:29
One of the solutions is to use here-document to assign the whole HTML page to PHP variable and later echo/print it where it matches your needs, and you can include the Javascript codes there as well解决方案之一是使用 here-document 将整个 HTML 页面分配给 PHP 变量，然后在符合您需要的地方回显/打印它，您也可以在那里包含 Javascript 代码
Example "this example doesn't include the image thing you mentioned but you can use any Javascript codes"示例“此示例不包含您提到的图像内容，但您可以使用任何 Javascript 代码”
<?php
$variable=<<<_END
<html>
<p>Some HTML line...</p>
<script>
//you can write the Javascript codes you need here
console.log('Find this sentence at console !')
</script>
</html>
_END;
echo $variable;
?>
解决方案3
1 2020-12-01 09:51:37
In order to deliver it in browser, we have to construct JS code as a string inside the PHP code为了在浏览器中传递它，我们必须将 JS 代码构造为 PHP 代码中的字符串
eg.例如。 Test.phtml - where i am calling a js function under some condition. Test.phtml - 我在某些条件下调用 js 函数。
<body>
<?php if($this->emptyData){ ?>
<div id="someTestDialog">
<!-- call js function below -->
<?php
echo '<script type="text/javascript">testDialog();</script>';
?>
</div>
<?php } ?>
</body>
<script>
function testDialog() {
return $("<div class='dialog' title='Alert'><p>Hello World</p></div>")
.dialog({
resizable: false,
height:90,
width:90,
modal: true,
dialogClass: 'no-close success-dialog',
buttons: {
"OK": function() {
$( this ).dialog( "close" );
}
}
});}
$(document).ready(function() {
var text = "some code here" }); </script>
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