Programming PHP

mkdir
int mkdir(string path, int mode)
Creates the directory path with mode permissions. The mode is expected to be an octal
number, such as 0755. An integer value such as 755 or a string value such as “u+x” will not
work as expected. Returns true if the operation was successful and false if not.
mktime
int mktime(int hours, int minutes, int seconds, int month, int day, int year
[, int is_dst])
Returns the Unix timestamp value corresponding to the parameters, which are supplied in
the order hours, minutes, seconds, month, day, year, and (optionally) whether the value is in
Daylight Savings Time. This timestamp is the number of seconds elapsed between the Unix
epoch (January 1, 1970) and the given date and time.
The order of the parameters is different than that of the standard Unix mktime( ) call, to
make it simpler to leave out unneeded arguments. Any arguments left out are given the
current local date and time.
move_uploaded_file
bool move_uploaded_file(string from, string to)
Moves the file from to the new location to. The function moves the file only if from was
uploaded by an HTTP POST. If from does not exist or is not an uploaded file, or if any
other error occurs, false is returned; if not, if the operation was successful, true is
returned.
mt_getrandmax
int mt_getrandmax( )
Returns the largest value that can be returned by mt_rand( ).
mt_rand
int mt_rand([int min, int max])
Returns a random number from min to max, inclusive, generated using the Mersenne
Twister pseudorandom number generator. If min and max are not provided, returns a
random number from 0 to the value returned by mt_getrandmax( ).
424 | Appendix A: Function Reference
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