PHP file upload and error code summary_PHP tutorial-PHP Tutorial-php.cn

PHP file upload and error code summary_PHP tutorial

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Release： 2016-07-13 16:56:40

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This article summarizes the introduction to PHP file upload and error codes. Friends who need to learn can refer to this article.

Upload operation code

The code is as follows

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If($_FILES['myfile']['error'] > 0) { //Determine whether the file can be successfully uploaded to the server, 0 means the upload is successful
echo 'Error: ';

switch ( $_FILES['myfile']['error'] ) {
case UPLOAD_ERR_OK:
                         $response = 'There is no error, the file uploaded with success.';
break;
case UPLOAD_ERR_INI_SIZE:
                          $response = 'The uploaded file exceeds the upload_max_filesize directive in php.ini.';
break;
case UPLOAD_ERR_FORM_SIZE:
                        $response = 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.';
break;
case UPLOAD_ERR_PARTIAL:
                         $response = 'The uploaded file was only partially uploaded.';
break;
case UPLOAD_ERR_NO_FILE:
                        $response = 'No file was uploaded.';
break;
case UPLOAD_ERR_NO_TMP_DIR:
                        $response = 'Missing a temporary folder. Introduced in PHP 4.3.10 and PHP 5.0.3.';
break;
case UPLOAD_ERR_CANT_WRITE:
                            $response = 'Failed to write file to disk. Introduced in PHP 5.1.0.';
break;
case UPLOAD_ERR_EXTENSION:
                             $response = 'File upload stopped by extension. Introduced in PHP 5.2.0.';
break;
                   default:
                     $response = 'Unknown error';
break;
          }
echo $response;
Exit; //If $_FILES['myfile']['error'] is greater than 0, there is an error, output the error message and exit the program
}

//Get the main type and subtype of the MIME type of the uploaded file
List($maintype,$subtype)=explode("/",$_FILES['myfile']['type']);

If ($maintype=="text") { //Text files cannot be uploaded through main type restrictions, such as .txt.html.php and other files

echo 'Problem: Unable to upload text file. ';
exit; //Exit the program if the user uploads a text file
}

$upfile = './uploads/'.time().$_FILES['myfile']['name']; //Define the location and new file name after uploading

If ( is_uploaded_file($_FILES['myfile']['tmp_name']) ) { //Determine whether it is an uploaded file

If ( !move_uploaded_file($_FILES['myfile']['tmp_name'], $upfile) ) { //Move files from
echo 'Problem: The file cannot be moved to the specified directory. ';
exit;
          }
}else{
echo 'Problem: The uploaded file is not a legal file: ';
echo $_FILES['myfile']['name'];
exit;
}

echo 'File: '.$upfile.' Uploaded successfully, size: '.$_FILES['myfile']['size'].'!
'; //If the file is uploaded successfully, output
?>

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