[李景山php]每天laravel-20160911|FileSystem-2

/**
* Get the returned value of a file.
*
* @param  string  $path
* @return mixed
*
* @throws \Illuminate\Contracts\Filesystem\FileNotFoundException
*/
public function getRequire($path)
{
if ($this->isFile($path)) {// if it is a file
return require $path; // require it
}

throw new FileNotFoundException("File does not exist at path {$path}");// throw Exception
}
// yesterday we learn this filesystem function
// now we will get the return value of a file.

/**
* Require the given file once.
*
* @param  string  $file
* @return mixed
*/
public function requireOnce($file)
{
require_once $file;// fool
}// require once a wrap by function

/**
* Write the contents of a file.
*
* @param  string  $path
* @param  string  $contents
* @param  bool  $lock
* @return int
*/
public function put($path, $contents, $lock = false)
{
return file_put_contents($path, $contents, $lock ? LOCK_EX : 0);
}// use a put function to set a normal function
// and determine a if has a file write lock

/**
* Prepend to a file.
*
* @param  string  $path
* @param  string  $data
* @return int
*/
public function prepend($path, $data)
{
if ($this->exists($path)) {
return $this->put($path, $data.$this->get($path));
}// if has old data, get it and combine it and new data

return $this->put($path, $data);
}// prepend is like insert some thing before the old data.

/**
* Append to a file.
*
* @param  string  $path
* @param  string  $data
* @return int
*/
public function append($path, $data)
{
return file_put_contents($path, $data, FILE_APPEND);
}// append can use this file_put_contents function and set this variable to get it.

/**
* Delete the file at a given path.
*
* @param  string|array  $paths
* @return bool
*/
public function delete($paths)
{// use a very good way to delete a file ,but we need know this file path
$paths = is_array($paths) ? $paths : func_get_args();// if paths is a array

$success = true;// set this flag for done

foreach ($paths as $path) {// loop this path
try {
if (! @unlink($path)) {// delete the file
$success = false;
}
} catch (ErrorException $e) {// catch some thing wrong
$success = false;
}
}

return $success;// return result;
}

/**
* Move a file to a new location.
*
* @param  string  $path
* @param  string  $target
* @return bool
*/
public function move($path, $target)
{
return rename($path, $target);
}// a wrap like move use this rename