Function thaidate

Thai date use date() function.

Located at Thaidate/thaidate-functions.php

Parameters summary
`string`	`$format`	The format as same as PHP date function format. See http://php.net/manual/en/function.date.php
`integer`	`$timestamp = ''`	The optional timestamp is an integer Unix timestamp.
`boolean`	`$buddhist_era = true`	Use Buddhist era? set to true to use that or false not to use.

Return value summary
`string`	Return the formatted date/time string.