(PHP 4, PHP 5, PHP 7)
intval() - Gets the integer value of a variable
intval (mixed $ var [, int $ base = 10]): int
Returns the integer value of var, using the base specified for conversion (default is base 10). intval() should not be used on objects, because doing so will generate an E_NOTICE level error and return 1.
intval in php
Scalar values are converted to an integer
Facility to convert
If base is 0, the base used is determined by the format of var:
if the string includes the prefix "0x" (or "0X"), the base is taken as 16 (hex); if not,
if the string begins with "0", then the base is taken as 8 (octal); if not,
The base is taken as 10 (decimal).
The integer value of var on success or 0 on failure. Empty array returns 0, non-empty array returns 1.
The maximum value depends on the system. 32-bit systems have a maximum signed integer range from -2147483648 to 2147483647. Therefore, for example on such a system, intval ('1000000000000') will return 2147483647. The maximum signed integer value for 64 bit systems is 9223372036854775807.
The string will most likely return 0 although this depends on the leftmost characters of the string. The general rules of integer casting apply.
<?php echo intval(12); => 12 echo intval('12'); => 12 echo intval('blogdev'); => 0