php上传功能集后缀名判断和随机命名(强力推荐)
发布:smiling 来源: PHP粉丝网 添加日期:2021-06-17 10:32:16 浏览: 评论:0
本篇文章给大家分享php上传功能集后缀名判断和随机命名,代码写的简单易懂,感兴趣的朋友快来参考下吧。
不废话了,具体请看下文代码示例讲解。
form.php
- <html>
- <head>
- <meta http-equiv="content-type" content="text/html" charset="utf-8">
- <title>Upload Image</title>
- </head>
- <body>
- <form method="post" action="upload.php" enctype="multipart/form-data">
- <input type="hidden" name="MAX_FILE_SEZE" value="2000000">
- <input type="file" name="file" value="view">
- <input type="submit" value="upload" name="B1">
- </form>
- </body>
- </html>
upload.php
- <?php
- include("check.php"); // 引入自定义函数文件
- $type = array("jpg", "gif", "bmp", "jpeg", "png");
- // 判断上传文件类型
- $fileext = strtolower(fileext($_FILES['file']['name']));
- $uploadfilename = random(8);
- if(in_array($fileext, $type)){
- $filename = explode(".", $_FILES['file']['name']);
- if(is_uploaded_file($_FILES['file']['tmp_name'])){
- // echo $_FILES['file']['tmp_name'];
- $flag = move_uploaded_file($_FILES['file']['tmp_name'], "/Library/WebServer/Documents/test/".$uploadfilename.".".$fileext);
- if($flag){
- echo "上传成功!";
- }else{
- echo "Error.";
- }
- echo "<a href='javascript:history.go(-1)'>Back</a>";
- }
- }
check.php
- <?php
- header("Content-type:text/html;charset=utf8");
- // 获取文件后缀名函数
- function fileext($filename){
- $sTemp = strrchr($filename, ".");
- return substr($sTemp, 1);
- }
- function fileext2($filename){
- $sTemp = explode(".", $filename);
- return $sTemp[count($sTemp)-1];
- }
- // 生成随机文件名函数
- function random($length){
- $captchaSource = "0123456789abcdefghijklmnopqrstuvwxyz这是一个随机打印输出字符串的例子";
- $captchaResult = "2015"; // 随机数返回值
- $captchaSentry = ""; // 随机数中间变量
- for($i=0;$i<$length;$i++){
- $n = rand(0, 35); #strlen($captchaSource));
- if($n >= 36){
- $n = 36 + ceil(($n-36)/3) * 3;
- $captchaResult .= substr($captchaSource, $n, 3);
- }else{
- $captchaResult .= substr($captchaSource, $n, 1);
- }
- }
- return $captchaResult;
- }
- ?>
将三个文件整合成一个:
- <?php
- // 获取文件后缀名函数
- function fileext($filename){
- $sTemp = strrchr($filename, ".");
- return substr($sTemp, 1);
- }
- function fileext2($filename){
- $sTemp = explode(".", $filename);
- return $sTemp[count($sTemp)-1];
- }
- // 生成随机文件名函数
- function random($length){
- $captchaSource = "0123456789abcdefghijklmnopqrstuvwxyz这是一个随机打印输出字符串的例子";
- $captchaResult = "2015"; // 随机数返回值
- $captchaSentry = ""; // 随机数中间变量
- for($i=0;$i<$length;$i++){
- $n = rand(0, 35); #strlen($captchaSource));
- if($n >= 36){
- $n = 36 + ceil(($n-36)/3) * 3;
- $captchaResult .= substr($captchaSource, $n, 3);
- }else{
- $captchaResult .= substr($captchaSource, $n, 1);
- }
- }
- return $captchaResult;
- }
- $type = array("jpg", "gif", "bmp", "jpeg", "png");
- // 判断上传文件类型
- $fileext = strtolower(fileext($_FILES['file']['name']));
- $uploadfilename = random(8);
- if(in_array($fileext, $type)){
- $filename = explode(".", $_FILES['file']['name']);
- if(is_uploaded_file($_FILES['file']['tmp_name'])){
- // echo $_FILES['file']['tmp_name'];
- $flag = move_uploaded_file($_FILES['file']['tmp_name'], "/Library/WebServer/Documents/test/".$uploadfilename.".".$fileext);
- if($flag){
- echo "上传成功!";
- }else{
- echo "Error.";
- }
- echo "<a href='javascript:history.go(-1)'>Back</a>";
- }
- }
- ?>
- <html>
- <head>
- <meta http-equiv="content-type" content="text/html" charset="utf-8">
- <title>Upload Image</title>
- </head>
- <body>
- <form method="post" action="" enctype="multipart/form-data">
- <input type="hidden" name="MAX_FILE_SEZE" value="2000000">
- <input type="file" name="file" value="view">
- <input type="submit" value="upload" name="B1">
- </form>
- </body>
- </html>
以上内容就是给大家讲解的php上传功能集后缀名判断和随机命名(强力推荐),希望大家喜欢。
Tags: php上传功能
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