I am using two ways to convert a hexadecimal string to decimal. Using intval function in which I am passing 16 base as the second parameter to convert the hexa decimal string in decimal. same thing I am doing using hexdec built-in function. Both returning different answer.
May I know the reason behind these two function's output?
$a = 'efdebd76';
echo 'intvar : '. intval($a,16);
echo '<br/>';
echo 'hexdec : '.hexdec($a);
Output
intvar : 2147483647
hexdec : 4024352118
from php manual about "intval" function:
Return Values: 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.
so I guess you run intval on 32 bit system because it return you the value 2147483647, and the value of 0xefdebd76 is bigger than the maximum Integer value. in hex_string, it's seems that it not limited by the system you execute this function.
