- Converting decimal to binary
- Converting binary to decimal
- Converting decimal to hexadecimal
- Convert hexadecimal to decimal
- Converting decimal to octal
- Converting octal to decimal
- base_convert() – convert a number between arbitrary bases
Converting decimal to binary
Using decbin()
function:
<?php
$dec = 5;
echo decbin($dec); # 101
Using base_convert() to covert decimal to binary:
<?php
$dec = 5;
echo base_convert($dec, 10, 2);
#Prints: 101
Using sprintf() function to convert decimal to binary, the %b
argument is presented as a binary number:
<?php
$dec = 5;
$bin = sprintf('%b', $dec);
echo $bin; # 101
Converting binary to decimal
Using bindec()
function:
<?php
$bin = 101;
echo bindec($bin); # 5
Using base_convert() to convert binary to decimal:
<?php
$bin = 101;
$dec = base_convert($bin, 2, 10);
echo $dec; # Prints: 5
Using sprintf() function, the %d
argument is presented as a decimal number:
<?php
$bin = 0b101;
$dec = sprintf('%d', $bin);
echo $dec; # Prints: 5
Note: You must prefix the binary number (101) with “0b
” (0b101), or the sprintf()
function treats it as a decimal number.
Converting decimal to hexadecimal
Using dechex()
function:
<?php
$dec = 1000;
echo dechex($dec); # 3e8
Using base_convert() function to convert decimal to hexadecimal:
<?php
$dec = 1000;
$hex = base_convert($dec, 10, 16);
echo $hex; # Prints: 3e8
Using sprint() function, the argument %x
is presented as a hexadecimal number.
<?php
$dec = 1000;
$hex = sprintf('%x', $dec);
echo $hex; # Prints: 3e8
Converting hexadecimal to decimal
Using hexdec()
function:
<?php
$hex = '3e8';
echo hexdec($hex); # 1000
Using base_convert() function to convert hexadecimal to decimal:
<?php
$hex = '3e8';
$dec = base_convert ($hex, 16, 10);
echo $dec; # Prints: 1000
Using sprintf() function, the argument %d
presented as a decimal number:
<?php
$hex = 0x3e8;
$dec = sprintf('%d', $hex);
echo $dec; # Prints: 1000
Note: You must prefix the hexadecimal number (3e8) with “0x
” (0x3e8), or the sprintf()
function won’t translate it properly.
Converting decimal to octal
Using decoct()
function:
<?php
$dec = 1000;
echo decoct($dec); # 1750
Using base_convert() function to convert decimal to octal:
<?php
$dec = 1000;
$oct = base_convert($dec, 10, 8);
echo $oct; # Prints: 1750
Using sprint() function, the argument %o
is presented as an octal number.
<?php
$dec = 1000;
$oct = sprintf('%o', $dec);
echo $oct; # 1750
Converting octal to decimal
Using octdec()
function:
<?php
$oct = 1750;
echo octdec($oct); # 1000
Using base_convert() function to convert octal to decimal:
<?php
$oct = 1750;
$dec = base_convert($oct, 8, 10);
echo $dec; # Prints: 1000
Using sprint() function, the argument %d
is presented as a decimal number:
<?php
$oct = 01750;
$dec = sprintf('%d', $oct);
echo $dec; # Prints: 1000
Note: the octal number must be prefixed by 0 (zero) or 0o (as of PHP 8.1), the octal number 1750 can be declared as 01750 or 0o1750.
The base_convert() function
<?php
//Syntax
base_convert(string $num, int $from_base, int $to_base): string
This function takes three parameters:
$num
: The number to convert.$from_base
: The current base of the number$to_base
: The base to convert number to
The base_convert()
function works for all bases from 2 to 36:
<?php
$dec = 1000;
$bin = base_convert($dec, 10, 2);
echo "Decimal $dec to binary $bin <br>";
$hex = base_convert($bin, 2, 16);
echo "Binary $bin to hexadecimal $hex <br>";
$oct = base_convert($hex, 16, 8);
echo "Hexadecimal $hex to octel $oct <br>";
$dec = base_convert($oct, 8, 10);
echo "Octel $oct to decimal $dec <br>";
# The following output prints on the web browser
/* Decimal 1000 to binary 1111101000
Binary 1111101000 to hexadecimal 3e8
Hexadecimal 3e8 to octel 1750
Octel 1750 to decimal 1000 */
Doing Math:
- Finding absolute value, lowest value, and highest value
- Using Ceil, Floor, and Round functions
- Generating random numbers
- Converting numbers between decimal, binary, octal, and hexadecimal
- Trigonometry, Exponential and Logarithmic Functions