Convert Local UNIX Timestamp to GMT This function converts local unix timestamp to GMT time format. It accepts local unix timestamp as input parameter. This is very simple function made using php time and date functions.
Number of days in a month This function takes a month/year as input and returns the number of days for the given month/year. It takes leap years into consideration. It takes month and year as parameter, both should be integers.
Array Index Set This function lets you determine whether an array index is set and whether it has a value. It takes array item, array and default value as parameters. If the element is empty it returns FALSE or whatever you specify as the default value.