PHP multiple file upload operation_PHP tutorial

PHP multi-file upload operation

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In fact, multiple file uploads and single file uploads are similar. The principles are the same, but there are some tricks in the code.

The first is the index.html upload form, but the file in the previous file upload form is changed to file[]

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Upload file:

Upload file:

Upload file:

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Use $_FILES in upload.php to print it

print_r($_FILES);

?>

Get the following multi-dimensional array

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Array

(

[file] => Array

(

[name] => Array

          (

                  [0] => Photo 1.jpg

                  [1] => Photo 2.jpg

                                                                                                                                                                                                                                                               

        )

[type] => Array

          (

                                                                                                                                                                   

                                                                                                                                                                                               

                                                                                                                                                                                                           

        )

[tmp_name] => Array

          (

                                                                                                                        [0] => [1] => [2] =>

        )

[error] => Array

          (

                  [0] => 0

                    [1] => 0

                  [2] => 0

        )

[size] => Array

          (

                  [0] => 0

                  [1] => 0

                  [2] => 0

        )

)

)

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According to the principle of single file upload, first think about what we need to get?

Obviously we need to get an array of file information. The array contains name, type, tmp_name, error, size. What we get at this time is a multi-dimensional array. Although the corresponding key values ​​exist, it is multi-dimensional. ,

We only need to split it, such as the three files above, we only need to split it into the corresponding three file information arrays.

Structure of split array

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Array

(

[0] => Array

(

             [name] => Photo 1.jpg

[type] => image/jpeg

>

                                                                                                                                                                                                                 ​ >

)

[1] => Array

(

[name] = & gt; Photo 2.jpg

[type] => image/jpeg

>

                                                                                                                                                                                                                 ​ >

)

[2] => Array

(

[name] => Photo 3.jpg

[type] => image/jpeg

>

                                                                                                                                                                                                                 ​ >

)

)

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The following is the code for splitting and reorganizing the array

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//print_r($_FILES['file']);

$arr=$_FILES['file'];

$files=array();

for($i=0;$i

$files[$i]['name']=$arr['name'][$i];

$files[$i]['type']=$arr['type'][$i];

$files[$i]['tmp_name']=$arr['tmp_name'][$i];

$files[$i]['error']=$arr['error'][$i];

$files[$i]['size']=$arr['size'][$i];

}

print_r($files);

?>

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The rest is simple. Just repeat the steps of uploading a single file and iterate through the array.

The code is as follows:

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//print_r($_FILES['file']);

$arr=$_FILES['file'];

$files=array();

for($i=0;$i $files[$i]['name']=$arr['name'][$i];

$files[$i]['type']=$arr['type'][$i];

$files[$i]['tmp_name']=$arr['tmp_name'][$i];

$files[$i]['error']=$arr['error'][$i];

$files[$i]['size']=$arr['size'][$i];

}

for($i=0;$i //Get uploaded file information

$fileName=$files[$i]['name'];

$fileType=$files[$i]['type'];

$fileError=$files[$i]['type'];

$fileSize=$files[$i]['size'];

$tempName=$files[$i]['tmp_name'];//Temporary file name

//Define upload file type

$typeList = array("image/jpeg","image/jpg","image/png","image/gif"); //Define allowed types

if($fileError>0){

//Judge the error number of uploaded files

switch ($fileError) {

case 1:

$ message = "uploaded files exceeded the value restricted by upload_max_filesize options in php.ini.";

break;

case 2:

                                                                                                                                                                                                $message="The size of the uploaded file exceeds the value specified by the MAX_FILE_SIZE option in the HTML form.";

break;

case 3:

                        $message="Only part of the file has been uploaded.";

break;

case 4:

                            $message="No files uploaded.";

break;

case 6:

$ message = "Can't find the temporary folder.";

break;

case 7:

                        $message="File writing failed";

break;

case 8:

                                $message="File upload interrupted due to PHP extension";

break;

      }

exit("File upload failed: ".$message);

}

if(!is_uploaded_file($tempName)){

//Determine whether it is a file uploaded by POST

exit("It was not uploaded via HTTP POST");

}else{

if(!in_array($fileType, $typeList)){

exit("The uploaded file is not of the specified type");

}else{

if(!getimagesize($tempName)){

                                                                                                                                                            // Prevent users from uploading malicious files, such as changing the virus file extension to image format

exit("The uploaded file is not a picture");

      }

}

if($fileSize>1000000){

                                                                                                                                                                                                              ’ ’       ’ to ’     ’                     out‐‐ together ‐ out‐download of a specific form to be uploaded

                    exit("Uploaded file exceeds limit size");

      }else{

// Avoid the Chinese name garbled in the Chinese name

                                                      $fileName=iconv("UTF-8", "GBK", $fileName);//Convert the character encoding captured by iconv from utf-8 to gbk output

$ filename = strlaplace (".", Time (). ".", $ Filename); // Add the time stamp after the picture name, avoid the re -name file coverage

                                                                                                                                                                                                                                                                                   

                        echo "File uploaded successfully!";

        }else{

                                                                                                                                                                having having  -                                           echo "Failed to upload file";

        }

      }

}

}

?>

http://www.bkjia.com/PHPjc/855346.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/855346.htmlTechArticlePHP multi-file upload operation is actually similar to multi-file upload and single-file upload. The principles are the same, but in the code Did a little trick on it. The first is the index.html upload form, just...