decbin() - math

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

Parameters : 
 number - Decimal value to convert
      

Range of inputs on 32-bit machines





positive number
negative number
return value




0
 
0


1
 
1


2
 
10


... 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)




Range of inputs on 64-bit machines





positive number
negative number
return value




0
 
0


1
 
1


2
 
10


... normal progression ...


9223372036854775806
 
111111111111111111111111111111111111111111111111111111111111110


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


 
-9223372036854775808
1000000000000000000000000000000000000000000000000000000000000000


... normal progression ...


 
-2
1111111111111111111111111111111111111111111111111111111111111110


 
-1
1111111111111111111111111111111111111111111111111111111111111111 (64 1's) 

Syntax

string decbin
    ( int $number
   )

Example

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

Output / Return Value

Limitations

Alternatives / See Also

Reference