简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW) 日本語(JA) 한국어(KO) Melayu(MS) Français(FR) Deutsch(DE)
Home > Backend Development > PHP Tutorial > body text

How to use php to determine file extension

一个新手
Release： 2023-03-15 22:16:01
Original
1839 people have browsed it


<!DOCTYPE>
<html>
<head>
    <meta http-equiv="Content-type" content="text/html" charset="utf-8">
    <title>check file</title>
</head>
<body>
<b>文件扩展名验证</b>
<input type="text" name="int" value="文件.php" onblur="check(this)" id="int">
<input type="button" value="检测" onclick="check_value()">
<script>    function check(obj){        
    if(obj.value == "" || obj.value.length<3){
            alert("输入的长度不能小于3且不能为空!");
            obj.focus();
        }
    }    function check_value(){        var str = $("int").value;        var repx = /\.(php|asp|jsp)$/i;        var type = str.substring(str.lastIndexOf("."),str.length);        if(type.match(repx) && str.lastIndexOf(".") != -1){
            alert("文件扩展名正确");
            $("int").focus();
        }else{
            alert("文件扩展名有误");
            $("int").focus();
        }
    }    function $(obj){        return document.getElementById(obj);
    }</script>
</body>
</html>
Copy after login

The above is the detailed content of How to use php to determine file extension. For more information, please follow other related articles on the PHP Chinese website!

Related labels：
php extension name document
source：php.cn
Previous article：Using php to implement loop playback of advertising images Next article：What you don’t know about php observer pattern
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
The page suddenly cannot pull css or bootstrap So I'm developing a page, I did part of it yesterday and it worked great, and today I cont...
From 2024-04-06 21:58:04
0
1
800
The entity warehouse extends JpaRepository<Entity, Id> and JpaSpecificationExecutor<Entity>, and EntitySpec extends Specification<Entity> This is my endpoint http://localhost:8080/country/all replies are ok for all countries and...
From 2024-04-06 17:11:03
0
1
421
Combining HTTPS redirection with rewrite rules cannot add .php extension Hope someone can help. I want to remove the file extension (.php) from internal links, but...
From 2024-04-04 15:44:30
0
1
299
Javascript - Mocha Chai unit tests not running I'm working on a project with the Front End Web Development course bootcamp and unfortunat...
From 2024-04-02 14:52:19
0
1
356
Custom pad extension with extension icon after title I'm trying to create a mat accordion with a mat expanding panel inside a for loop. The pro...
From 2024-04-02 12:39:50
0
1
381
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！