php上传功能集后缀名判断和随机命名(强力推荐)
不废话了，具体请看下文代码示例讲解。
form.php
<html> <head> <metahttp-equiv="content-type"content="text/html"charset="utf-8"> <title>UploadImage</title> </head> <body> <formmethod="post"action="upload.php"enctype="multipart/form-data"> <inputtype="hidden"name="MAX_FILE_SEZE"value="2000000"> <inputtype="file"name="file"value="view"> <inputtype="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($flag){
echo"上传成功！";
}else{
echo"Error.";
}
echo"<ahref='javascript:history.go(-1)'>Back</a>";
}
}
check.php
<?php
header("Content-type:text/html;charset=utf8");
//获取文件后缀名函数
functionfileext($filename){
$sTemp=strrchr($filename,".");
returnsubstr($sTemp,1);
}
functionfileext2($filename){
$sTemp=explode(".",$filename);
return$sTemp[count($sTemp)-1];
}
//生成随机文件名函数
functionrandom($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
functionfileext($filename){
$sTemp=strrchr($filename,".");
returnsubstr($sTemp,1);
}
functionfileext2($filename){
$sTemp=explode(".",$filename);
return$sTemp[count($sTemp)-1];
}
//生成随机文件名函数
functionrandom($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"<ahref='javascript:history.go(-1)'>Back</a>";
}
}
?>
<html>
<head>
<metahttp-equiv="content-type"content="text/html"charset="utf-8">
<title>UploadImage</title>
</head>
<body>
<formmethod="post"action=""enctype="multipart/form-data">
<inputtype="hidden"name="MAX_FILE_SEZE"value="2000000">
<inputtype="file"name="file"value="view">
<inputtype="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。