public function isFile($filePath)
	{
		if (substr($filePath, 0, 1) != '/') {
			$filePath = '/'.$filePath;
		}
		return is_file('s3://'.$this->getBucket().$filePath);
	}
public function isFile($filePath)
	{
		if (substr($filePath, 0, 1) != '/') {
			$filePath = '/'.$filePath;
		}
		return is_file('s3://'.$this->getBucket().$filePath);
	}
public function isFile ( $ filePath ) { if ( substr ( $ filePath , 0 , 1 ) != '/' ) { $ filePath = '/' . $ filePath ; } return is_file ( 's3://' . $ this -> getBucket ( ) . $ filePath ) ; }
Checks if file exists on s3 storage
@param  string  $filePath path to file on s3 storage
@return boolean
Checks if file exists on s3 storage