decbin

decbin

(PHP 4, PHP 5, PHP 7)

decbin — Decimal to binary

Description

string decbin ( int $number )

Returns a string containing a binary representation of the given number argument.

Parameters

number

Decimal value to convert

| ... normal progression ... |

| 2147483646 | ​ | 1111111111111111111111111111110 |

| 2147483647 (largest signed integer) | ​ | 1111111111111111111111111111111 (31 1's) |

| 2147483648 | -2147483648 | 10000000000000000000000000000000 |

| ... normal progression ... |

| 4294967294 | -2 | 11111111111111111111111111111110 |

| 4294967295 (largest unsigned integer) | -1 | 11111111111111111111111111111111 (32 1's) |

| ... normal progression ... |

| 9223372036854775806 | ​ | 111111111111111111111111111111111111111111111111111111111111110 |

| 9223372036854775807 (largest signed integer) | ​ | 111111111111111111111111111111111111111111111111111111111111111 (63 1's) |

| ​ | -9223372036854775808 | 1000000000000000000000000000000000000000000000000000000000000000 |

| ... normal progression ... |

| ​ | -2 | 1111111111111111111111111111111111111111111111111111111111111110 |

| ​ | -1 | 1111111111111111111111111111111111111111111111111111111111111111 (64 1's) |

Return Values

Binary string representation of number

Examples

Example #1 decbin() example

<?php
echo decbin(12) . "\n";
echo decbin(26
?>

​

The above example will output:

​

​

1100
11010

​

See Also

• bindec() - Binary to decimal

• decoct() - Decimal to octal

• dechex() - Decimal to hexadecimal

• base_convert() - Convert a number between arbitrary bases

• printf() - Output a formatted string, using %b, %032b or %064b as the format

• sprintf(), using %b, %032b or %064b as the format

← cosh

dechex →

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https://secure.php.net/manual/en/function.decbin.php