闲来无事，整理了一下自己写的文件上传类。
通过
UploadFile::getInstance($model, $attribute); UploadFile::getInstances($model, $attribute); UploadFile::getInstanceByName($name); UploadFile::getInstancesByName($name);
把表单上传的文件赋值到 UploadedFile中的 private static $_files 中
/**
* Returns an uploaded file for the given model attribute.
* The file should be uploaded using [[yiiwidgetsActiveField::fileInput()]].
* @param yiibaseModel $model the data model
* @param string $attribute the attribute name. The attribute name may contain array indexes.
* For example, '[1]file' for tabular file uploading; and 'file[1]' for an element in a file array.
* @return UploadedFile the instance of the uploaded file.
* Null is returned if no file is uploaded for the specified model attribute.
* @see getInstanceByName()
*/
public static function getInstance($model, $attribute)
{
$name = Html::getInputName($model, $attribute);
return static::getInstanceByName($name);
}
/**
* Returns all uploaded files for the given model attribute.
* @param yiibaseModel $model the data model
* @param string $attribute the attribute name. The attribute name may contain array indexes
* for tabular file uploading, e.g. '[1]file'.
* @return UploadedFile[] array of UploadedFile objects.
* Empty array is returned if no available file was found for the given attribute.
*/
public static function getInstances($model, $attribute)
{
$name = Html::getInputName($model, $attribute);
return static::getInstancesByName($name);
}
/**
* Returns an uploaded file according to the given file input name.
* The name can be a plain string or a string like an array element (e.g. 'Post[imageFile]', or 'Post[0][imageFile]').
* @param string $name the name of the file input field.
* @return UploadedFile the instance of the uploaded file.
* Null is returned if no file is uploaded for the specified name.
*/
public static function getInstanceByName($name)
{
$files = self::loadFiles();
return isset($files[$name]) ? $files[$name] : null;
}
/**
* Returns an array of uploaded files corresponding to the specified file input name.
* This is mainly used when multiple files were uploaded and saved as 'files[0]', 'files[1]',
* 'files[n]'..., and you can retrieve them all by passing 'files' as the name.
* @param string $name the name of the array of files
* @return UploadedFile[] the array of UploadedFile objects. Empty array is returned
* if no adequate upload was found. Please note that this array will contain
* all files from all sub-arrays regardless how deeply nested they are.
*/
public static function getInstancesByName($name)
{
$files = self::loadFiles();
if (isset($files[$name])) {
return [$files[$name]];
}
$results = [];
foreach ($files as $key => $file) {
if (strpos($key, "{$name}[") === 0) {
$results[] = $file;
}
}
return $results;
}
