How to call php from js

JS method of calling php: First call the relevant statements in the page [a.html], and add the relevant code in [b.php]; then when the [a.html] file is executed, it will Call the [b.php] file and execute the output of the [b.php] file as a JS statement.

JS method of calling php:

Give a simple example to illustrate:

For example, in the page a.html, use the following sentence to call:

<script type="text/javascript" src="b.php?action=test"></script>
<script type="text/javascript" >
alert(jstext);
</script>

There is such a PHP code in b.php:

<? 
$action=$_GET[&#39;action&#39;]; 
//echo "var jstext=&#39;$action&#39;"; 
//输出一句JS语句,生成一个JS变量,并赋颠值为PHP变量 $action的值
 //echo "var jstext=&#39;aa&#39;"; echo "var jstext="."&#39;$action&#39;"; 
?>

When the a.html file is executed, b will be called .php file, and execute the output of the b.php file as a JS statement, so a prompt box will pop up here with the value of the JS variable jstext, which is the value assigned to jstext in the PHP file.

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