======get_csv_data====== FW >= 1317 Extract partial CSV data from an existing CSV file ====Description==== string get_csv_data ( string $filename, string $columns , int $interval] [, int $json] ) This function takes a filename (including the full path) in the $filename parameter and a list of columns to extract in the $columns field. The $interval period in minutes is used to extract data at predefined intervals from the start of the file. ====Parameters==== $filename: Valid filename of a CSV file (with the first row containing the column names) $columns: Comma separated list of column headers (case sensitive) to extract from the CSV file $interval: Interval in minutes between result rows $json: Return data as CSV by passing 0, or as JSON by passing 1 ====Return Values==== string resultant rows in the format specified (CSV or JSON) ====Examples====

The above example will display:


[[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
,[0,0]
]

The above example shows zero due to the CSV file having blank entries.