Class: Math_BigInteger

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger('0x32', 16); // 50 in base-16
 
    
    echo $a->toString(); // outputs 50
  ?>

Parameters:

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger('10');
    $b = new Math_BigInteger('20');
 
    $c = $a->add($b);
 
    echo $c->toString(); // outputs 30
  ?>

Parameters:

Parameters:

Although integers can be converted to and from various bases with relative ease, there is one piece of information that is lost during such conversions. The number of leading zeros that number had or should have in any given base. Per that, if you convert 1 from decimal to binary, there's no way to know just how many leading zero's there should be. In truth, there could be any number.

Normally, the number of leading zero's is unimportant. When doing "not", however, it is. The "not" of 1 on an 8-bit representation of 1 is 1111 1110. The "not" of 1 on a 16-bit representation of 1 is 1111 1111 1111 1110. When doing it on a number that's preceeded by an infinite number of zero's, it's infinite.

This function assumes that there are no leading zero's - that the bit-representation being used is equal to the minimum number of required bits, unless otherwise specified in the optional parameter, where the optional parameter represents the bit-representation being used. If the specified bit-representation is smaller than the minimum number of bits required to represent the number, the latter will be used as the bit-representation.

Parameters:

Parameters:

Parameters:

Parameters:

Returns an array whose first element contains the quotient and whose second element contains the "common residue". If the remainder would be positive, the "common residue" and the remainder are the same. If the remainder would be negative, the "common residue" is equal to the sum of the remainder and the divisor.

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger('10');
    $b = new Math_BigInteger('20');
 
    list($quotient,$remainder) = $a->divide($b);
 
    echo $quotient->toString(); // outputs 0
        echo "\r\n";
    echo $remainder->toString(); // outputs 10
  ?>

Parameters:

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger(30);
    $b = new Math_BigInteger(17);
 
    $c = $a->modInverse($b);
 
    echo $c->toString(); // outputs 4
  ?>

Parameters:

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger('10');
    $b = new Math_BigInteger('20');
    $c = new Math_BigInteger('30');
 
    $c = $a->modPow($b, $c);
 
    echo $c->toString(); // outputs 10
  ?>

Parameters:

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger('10');
    $b = new Math_BigInteger('20');
 
    $c = $a->multiply($b);
 
    echo $c->toString(); // outputs 200
  ?>

Parameters:

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger('10');
    $b = new Math_BigInteger('20');
 
    $c = $a->subtract($b);
 
    echo $c->toString(); // outputs -10
  ?>

Parameters:

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger('65');
 
    echo $a->toBytes(); // outputs chr(65)
  ?>

Here's a quick 'n dirty example:

 <?php

    include('Math_BigInteger.php');
 
    $a = new Math_BigInteger('50');
 
    echo $a->toString(); // outputs 50
  ?>