Summary of methods for calling php from js and calling js from php-PHP Tutorial-php.cn

Summary of methods for calling php from js and calling js from php

不言

Release： 2023-04-03 07:44:01

Original

4333 people have browsed it

This article mainly introduces a summary of the methods of JS calling PHP and PHP calling JS. It has certain reference value. Now I share it with you. Friends in need can refer to it.

1 JS method of calling PHP file and get the value in php

Give a simple example to illustrate:

For example, in 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>

Copy after login

In b. There is such a piece of PHP code in 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;"; ?>

Copy after login

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

Summary:

Use JS to call the file in HTML to call the PHP file , then the output of the PHP file will be used as JS code by the calling page.

2 PHP calls the value in js

There is such a piece of code in the z.php page:

<script type="text/javascript" > var url="aaaa*"; </script> <? $key="<script type=text/javascript>document.write(url)</script>"; echo $key; ?>

Copy after login

3 php calls methods (functions) in js

<script type="text/javascript"> function test() {   var t1=3;   t1 = t1+2;   alert(t1);   //return t1; } </script>
<?php echo "<script type=&#39;text/javascript&#39;>test();</script>"; ?>

Copy after login

4 JS calls PHP variables

(1)

<?php
$userId=100;
?> <script>
var userId;
userId=document.getElementByIdx_x_x_x("userId").value;
alert (userId);
</script>
<input type="text" name="userId" id="userId" value="<?php echo $userId; ?>">

Copy after login

(2)

<?php$url = &#39;变化的网址&#39;;    //定义变量?><script type="text/javascript">//js调用php变量var ds ="<?php echo $url?>" ; //赋值 alert(ds); //输出效果 </script>
5  -------------------------------
<script language="JavaScript"> <!--
var Y=<?php echo date(&#39;Y&#39;)?>,M=<?php echo date(&#39;n&#39;)?>,D=<?php echo date(&#39;j&#39;)?>;
-->
</script>

Copy after login

6 The js and php written by myself call each other

1.php content:

<?php
 
//echo "<script LANGUAGE=&#39;javascript&#39;>alert(&#39;$php变量&#39;);</script>";   //最简单的php调用js
//echo "<a href=#><img width=50 src=&#39;$fruit_pic_array[$i]&#39; onMouseOver=’javascript:a();‘></a>";
//echo "<a href=&#39;3.php&#39;>aaaa</a>";   //php中超链接
 
//echo "<script type=&#39;text/javascript&#39; language=&#39;javascript&#39;>phpmake(&#39;PHP建站学习笔记网&#39;);</script>";   //有时候需要在PHP执行过程中，需要调用JavaScript自定义函数(验证时出错)
echo "function ok(msg){alert(msg);}";
?>

Copy after login

<HTML>
<HEAD>
<TITLE> php调用js文件的好办法</TITLE>
</HEAD>
<BODY>
<!--js调用php中定义的js-->
<scrīpt language=&#39;&#39;javascrīpt&#39;&#39; type=&#39;&#39;text/javascrīpt&#39;&#39; src=&#39;&#39;1.php&#39;&#39;></scrīpt>  
<scrīpt>
ok("aaaaaa!");
</scrīpt>
</script>
</BODY>
</HTML>

Copy after login

2.php content:

<!--js调用php-->

<?php
$userId=100;
?>

<script>
var userId;
userId=document.getElementByIdx_x("userId").value;
alert (userId);
</script>
<input type="text" name="userId" id="userId" value="<?php echo $userId; ?>">

 

 

<!--js调用php-->

<?php

if($_GET["action"]=="ok")

{

echo "I&#39;m OK!";

}

else

{

echo "I&#39;m not OK!";

}

?>

<SCRIPT Language = "JavaScript">

function func()

{

if(confirm("Are you OK with this?"))

{

this.location = "ok.php?action=ok";

}

else

{

this.location = "ok.php?action=cancel";

}

}

</SCRIPT>

<html>

<head>

</head>

<body>

<a href="#" href="#" onClick="javascript:func();">Please Click</a>

</body>

</html>

Copy after login

<html>
<head>
    <script>
        function isMail(PostString) {
            re = /\w*/
            if (re.test(PostString)) {
                return true;
            } else {
                return false;
            }
        }

        function test() {
            if (isMail(<?php echo $email?>)) {
                document.write("<?php echo "N";?>");
            } else {
                document.write(&#39;<?php echo &#39;Y&#39;;?>&#39;);
            }
        }
    </script>
</head>
<body>
<?php
$email = "aa";
?>

<input type=button value=click onclick=&#39;test() &#39;>
</body>
</html>


<!--php中含有js代码-->

<?php
echo "<script   language=javascript>
  function test(){
    alert( &#39;hello &#39;);    
  }
</script> ";
?>
<input type=button value=click onclick=&#39;test() &#39;>

Copy after login

The above is the entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!

Related recommendations:

PHP generates QR code for WeChat applet with parameters

For the five principles of PHP object-oriented design ( SOLID) Summary

The above is the detailed content of Summary of methods for calling php from js and calling js from php. For more information, please follow other related articles on the PHP Chinese website!