PHP Mathematical Functions. Free online PHP and MySQL Web Database Programming Tutorial...

ceil()
The ceil() function rounds a fraction up to the next highest integer. Its syntax follows:
ceil(number);

floor()
The floor() function rounds a fraction down to the next lowest integer. Its syntax follows:

floor(number);

pow()
We use this function to raise a number to the given exponent. Its syntax follows:

pow(number, exponent);

rand()
This function is used to generate a random value between two given numbers. Its syntax follows:

rand(min, max);

round()
This function rounds a fraction to the next highest or the next lowest integer. Its syntax follows:

round(number);

sqrt()
The sqrt() function returns the square root of the argument number. Its syntax follows:

sqrt(number);

decbin() and bindec()
The decbin() function converts decimal numbers to binary numbers and the bindec() function converts binary numbers to decimal numbers. Their syntax follows:

decbin(decimalNumber);
bindec(binaryNumber);

dechex() and hexdec()
The dechex() and hexdec() functions are used to convert decimal numbers to hexadecimal numbers and hexadecimal numbers to decimal numbers, respectively. Their syntax follows:

dechex(decimalNumber);
hexdec(HexaDecNumber);

decoct() and octdec()
We use the decoct() and octdec() functions to convert decimal numbers to octal and the octal numbers to decimal numbers, respectively. The syntax of these functions follows:

decoct(decimalNumber);
octdec(OctalNumber);

Next: PHP Application Functions