php上传功能集后缀名判断和随机命名(强力推荐)

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PHP学习不废话了,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


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

check.PHP


<?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,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,1);
    }
  }
  return $captchaResult;
}
$type = array("jpg",$_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='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>

以上内容就是给大家讲解的PHP 上传功能集后缀名判断和随机命名(强力保举),希望大家喜欢.

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php上传功能集后缀名判断和随机命名(强力推荐)

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