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

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Release： 2023-04-03 07:44:01

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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>

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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;"; ?>

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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; ?>

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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>"; ?>

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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; ?>">

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(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>

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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);}";
?>

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<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>

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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>

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<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;>

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