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php上传功能集后缀名判断跟随机命名

时间:2021-07-01 10:21:17 帮助过:15人阅读

php上传功能集后缀名判断和随机命名

form.php

<html><head>    <meta http-equiv="content-type" content="text/html" charset="utf-8">    <title>Upload Imagetitle>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

phpinclude("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 "Back";    }}

check.php

phpheader("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 "Back"; }}?> Upload Image

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