PHP decbin() Function
The PHP decbin() function returns a string which is the binary representation of a decimal number.
The table below shows decimal numbers converted into binary numbers.
| Decimal | Binary | Decimal | Binary |
|---|---|---|---|
| 0 | 0 | 15 | 1111 |
| 1 | 1 | 16 | 10000 |
| 2 | 10 | 31 | 11111 |
| 3 | 11 | 32 | 100000 |
| 4 | 100 | 63 | 111111 |
| 5 | 101 | 64 | 1000000 |
| 6 | 110 | 127 | 1111111 |
| 7 | 111 | 128 | 10000000 |
| 8 | 1000 | 500 | 111110100 |
Syntax
decbin(number)
Parameters
number |
Required. Specify the decimal number to convert. |
Return Value
Binary string representation of a decimal number.
Example:
In the example below, decbin() function returns the binary string representation of a given decimal number.
<?php
echo "decbin(0) = ".decbin(0)."\n";
echo "decbin(1) = ".decbin(1)."\n";
echo "decbin(10) = ".decbin(10)."\n";
echo "decbin(50) = ".decbin(50)."\n";
echo "decbin(100) = ".decbin(100)."\n";
echo "decbin(500) = ".decbin(500)."\n";
echo "decbin('999') = ".decbin('999')."\n";
echo "decbin('1023') = ".decbin('1023')."\n";
?>
The output of the above code will be:
decbin(0) = 0
decbin(1) = 1
decbin(10) = 1010
decbin(50) = 110010
decbin(100) = 1100100
decbin(500) = 111110100
decbin('999') = 1111100111
decbin('1023') = 1111111111
❮ PHP Math Reference
