I am looking PHP 7 new Additions in order to improve my skills, i want to know what exactly the difference between the intdiv() vs floor() or custom type cast
for example
echo (int) (8/3); // 2
echo floor((8/3)); // 2
echo intdiv((8/3)); // 2
what exactly the reason for this function to add in newer version of PHP.
In general all these three you mentioned works similar as of your example but intdiv() will give you more accurate result while working extremely large set of numbers
here is example you can see.
echo PHP_INT_MAX; // 9223372036854775807
echo (int)(PHP_INT_MAX/2); // 4611686018427387904
// here you can look the ending number
echo floor(PHP_INT_MAX/2); // 4.6116860184274E+18
// here you can see floor will return scientific notation for larger numbers
echo intdiv(PHP_INT_MAX,2); // 4611686018427387903
// you can compare the result return by (int) cast
intdiv() always give you positive number or in other word intdiv() let you know how many times you can divide evenly
Another example developer always use Modulus Operator in order to get remainder but intdiv() will always return you positive numbers and let you know how many times you can divide evenly.
echo (5 % 2) // 1
echo intdiv(5, 2) // 2
Hope this good enough to understand the difference among all 3 of them..