It's an asymmetric world

Private Methods:

_gen_var_val

Prototype:

_gen_var_val (array $vars)

Description:

Converts an associative array of $vars[name] = value into a url query string of the form: name1=val1&name2=val2&...

_gen_filename

Prototype:

string _gen_filename (void)

Description:

Generates a unique filename based on the name of the file being cached. First it replaces all slashes (/) by underlines (_), and then if the $USEVARS variable is set to "in_name", appends the rawurlencode'd contents of $VARSVAL to the filename.

_key_in_array

Prototype:

boolean _key_in_array (string $key, array $arr)

Description:

Returns true if the key is in the array, false otherwise.

_is_valid_time_unit

Prototype:

boolean _is_valid_time_unit (string $timeunit)

Description:

Returns true if a the parameter passed is a valid time unit, false otherwise.

_mktimestamp

Prototype:

int _mktimestamp (void)

Description:

Returns a timestamp in seconds. Wrapper for time().

_diff_time

Prototype:

int _diff_time (int $end, int $start[, string $timeunit])

Description:

Returns the difference between the $end and $start timestamps, in the units indicated by $timeunit. If the third parameter is omitted, it defaults to "day".

Example:

	// return the number of whole days between the 2 timestamps
	echo $obj->_diff_time($end, $start);

	// return the number of whole minutes between the 2 timestamps
	echo $obj->_diff_time($end, $start, "minute");