php上传功能集后缀名判断和随机命名(强力推荐)

2024-05-04 22:35:05

字体：大中小

来源：转载

供稿：网友

不废话了，具体请看下文代码示例讲解。

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

<?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 "<a href='javascript:history.go(-1)'>Back</a>";  }}

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 "<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>

上一篇：基于PHP+jQuery+MySql实现红蓝(顶踩)投票代码

下一篇：PHP的Yii框架的基本使用示例