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php上传原理与实例

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Release: 2016-06-23 13:30:06
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1.form标签enctype属性

2.$_FILES系统函数

$_FILES['myFile']['name']客户端文件的原名称

$_FILES['myFile']['type']文件的MIME类型,例如"image/gif".

$_FILES['myFile']['size']已上传文件的大小,单位为字节

$_FILES['myFile']['tmp_name']储存的临时文件名,一般时系统默认的

$_FILES['myFile']['error']该文件上传相关的错误编码

 

0:表示文件上传成功

1.超过文件的大小 php.ini中

2.超过文件大小max_file_size指定的值

3.文件只有不发呢被上传

4没有文件被上传

5上传文件大小为0

3.move_uploaaded_file函数

    上传后移动文件到目标位置的函数

move_uploaded_file(临时文件,目标位置和文件名);

4.is_uploaded_file函数

      判断上传mime类型的文件函数

move_uploaded_file(MIME);

 

实例:

1.

if(is_uploaded_file($_FILES['upfile']['tmp_name'])){

$upfiles=$_FILES["upfile"];

}

$name=$upfile["name"];

$type=$upfiles["type"];

$size=$upfiles["size"];

$tmp_name=$upfile["tmp_name"];

switch($type){

case 'image/pjpeg';

   break;

case 'image/jpeg';

   break;

case 'image/gif';

   break;

case 'image/png';

   break;

}

if(move_uploaded_file($tmp_name,'up/'.$name))

{ echo "上传成功"}

}

?>

上传文件:


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