php上传功能集后缀名判断和随机命名(强力推荐)

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不废话了,具体请看下文代码示例讲解。

form.PHP

PHP;"> <Meta http-equiv="content-type" content="text/html" charset="utf-8"> Upload Image
PHP" enctype="multipart/form-data">

upload.PHP

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 "Back";
}
}

check.PHP

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;"> Back"; } } ?> <Meta http-equiv="content-type" content="text/html" charset="utf-8"> Upload Image

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(强力推荐),希望大家喜欢。

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