Returns the int value of value, using the specified base for the conversion (the default is base 10). intval should not be used on objects, as doing so will emit an E_NOTICE level error and return 1.
The scalar value being converted to an integer
The base for the conversion
If base is 0, the base used is determined by the format of value:
if string includes a "0x" (or "0X") prefix, the base is taken as 16 (hex); otherwise,
if string starts with "0", the base is taken as 8 (octal); otherwise,
the base is taken as 10 (decimal).
The integer value of value on success, or 0 on failure. Empty arrays return 0, non-empty arrays return 1.
The maximum value depends on the system. 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647. So for example on such a system, intval('1000000000000') will return 2147483647. The maximum signed integer value for 64 bit systems is 9223372036854775807.
Strings will most likely return 0 although this depends on the leftmost characters of the string. The common rules of integer casting apply.
The base parameter has no effect unless the value parameter is a string.