如何使用 PHP 清除页面中的所有元素？

Question

Is there any way to clear all html elements in a php page?

For example I have 100 html elements in my page, is there anyway to remove them?

As we know with javascript we have innerHTML but in PHP what?

Answer 1

clear all html elements in a php page

That doesn't make sense. HTML elements only exist in the DOM after PHP has executed and sent an HTML document to the browser. Server-side, where PHP executes, there are no elements to remove.

If you're trying to manipulate the HTML you've already output, you need to capture it with output buffering (see ob_start , ob_get_contents and ob_end_clean ) but if your goal is to "clear all html elements", presumably so you can output a different set of elements, you simply need to not output anything in the first case. If this sounds like what you're trying to accomplish, you need to look into simple conditional statements like if / else .

as we know with javascript we have innerHTML but in php what ?

There is no PHP-equivalent because PHP doesn't have access to the client-side DOM. It is purely a server-side technology, and the output of your PHP script is the input to the browser. The DOM and its elements are generated long after your PHP script has executed. If you have an XHTML fragment in a string, and you want to parse/manipulate it, you can use xpath .

Answer 2

如果您的问题是“清除 php 文件中的 html 元素”，那么答案是： strip_tags() 。

$string = '<p>hello</p>';

echo strip_tags($string);

Answer 3

Try this:

<?php
if(//why you want to clear the elements){ 
echo "<script language=\"javascript\">";
?>

//Append all elements in <div id="body">
var body = document.getElementById("body");
body.innerHTML ="";

<?php
echo "</script>";

#Output your new element
echo "New elements.";
}
?>

Answer 4

Try this, it should definitely work.

<?php
echo "<script>document.write('');</script>";
?>