首頁 > 教學 > PHP 教學

php尾碼名判斷和隨機具名執行個體詳解

來源：互聯網
上載者：User
創建阿里雲帳戶，並獲得超過 40 款產品的免費試用版；而企業帳戶則可以享有總值 $1200 的免費試用版。立即註冊！
具體請看下文程式碼範例

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

<?phpinclude("check.php"); // 引入自訂函數檔案$type = array("jpg", "gif", "bmp", "jpeg", "png");// 判斷上傳檔案類型$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

<?phpheader("Content-type:text/html;charset=utf8");// 擷取檔案尾碼名函數function fileext($filename){  $sTemp = strrchr($filename, ".");  return substr($sTemp, 1);}function fileext2($filename){  $sTemp = explode(".", $filename);  return $sTemp[count($sTemp)-1];}// 產生隨機檔案名稱函數function random($length){  $captchaSource = "0123456789abcdefghijklmnopqrstuvwxyz這是一個隨機列印輸出字串的例子";  $captchaResult = "2015"; // 隨機數傳回值  $captchaSentry = ""; // 隨機數中間變數  for($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;}?>

將三個檔案整合成一個：

<?php// 擷取檔案尾碼名函數function fileext($filename){  $sTemp = strrchr($filename, ".");  return substr($sTemp, 1);}function fileext2($filename){  $sTemp = explode(".", $filename);  return $sTemp[count($sTemp)-1];}// 產生隨機檔案名稱函數function random($length){  $captchaSource = "0123456789abcdefghijklmnopqrstuvwxyz這是一個隨機列印輸出字串的例子";  $captchaResult = "2015"; // 隨機數傳回值  $captchaSentry = ""; // 隨機數中間變數  for($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");// 判斷上傳檔案類型$fileext = strtolower(fileext($_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>

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

聯繫我們

該頁面正文內容均來源於網絡整理，並不代表阿里雲官方的觀點，該頁面所提到的產品和服務也與阿里云無關，如果該頁面內容對您造成了困擾，歡迎寫郵件給我們，收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容，歡迎發送郵件至： info-contact@alibabacloud.com 進行舉報並提供相關證據，工作人員會在 5 個工作天內聯絡您，一經查實，本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More