不廢話了，具體請看下文代碼示例講解。
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"); // 引入自定義函數文件
$type = array("jpg", "gif", "bmp", "jpeg", "png");
// 判斷上傳文件類型
$fileext = strtolower(fileext($_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($flag){
echo "上傳成功！";
}else{
echo "Error.";
}
echo "<a href='javascript:history.go(-1)'>Back</a>";
}
}
check.php
<?php
header("Content-type:text/html;charset=utf8");
// 獲取文件後綴名函數
function fileext($filename){
$sTemp = strrchr($filename, ".");
return substr($sTemp, 1);
}
function fileext2($filename){
$sTemp = explode(".", $filename);
return $sTemp[count($sTemp)-1];
}
// 生成隨機文件名函數
function random($length){
$captchaSource = "0123456789abcdefghijklmnopqrstuvwxyz這是一個隨機打印輸出字符串的例子";
$captchaResult = "2015"; // 隨機數返回值
$captchaSentry = ""; // 隨機數中間變量
for($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 $captchaResult;
}
?>
將三個文件整合成一個：
<?php
// 獲取文件後綴名函數
function fileext($filename){
$sTemp = strrchr($filename, ".");
return substr($sTemp, 1);
}
function fileext2($filename){
$sTemp = explode(".", $filename);
return $sTemp[count($sTemp)-1];
}
// 生成隨機文件名函數
function random($length){
$captchaSource = "0123456789abcdefghijklmnopqrstuvwxyz這是一個隨機打印輸出字符串的例子";
$captchaResult = "2015"; // 隨機數返回值
$captchaSentry = ""; // 隨機數中間變量
for($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");
// 判斷上傳文件類型
$fileext = strtolower(fileext($_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 "上傳成功！";
}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>
以上內容就是給大家講解的php上傳功能集後綴名判斷和隨機命名(強力推薦)，希望大家喜歡。
