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PHP upload function set suffix name judgment and random naming (strongly recommended), PHP strongly recommended_PHP tutorial

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Release: 2016-07-13 16:53:50
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PHP upload function sets suffix name judgment and random naming (strongly recommended), PHP strongly recommends

No more nonsense, please see the code example below for details.

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>
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upload.php

<&#63;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>";
  }
}
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check.php

<&#63;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;
}
&#63;>
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Consolidate three files into one:

<&#63;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>";
  }
}
&#63;>
<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>
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The above content is to explain to you the PHP upload function set suffix name judgment and random naming (strongly recommended). I hope you like it.

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1053150.htmlTechArticlephp upload function set suffix name judgment and random naming (strongly recommended), php strongly recommended without nonsense, please contact us for details See the code example below for explanation. form.php htmlhead meta http-equiv="content-t...
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