PHP Classes

Lexographical PHP Permutations Generator: Generate permutations of characters of a string

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Version License PHP version Categories
permutations 1.0GNU General Publi...5Algorithms, PHP 5, Text processing
Description Author

This class can generate permutations of characters of a string.

It takes a given string and returns a new string with the same characters in a exchanged order.

The class can return all the permutation of a text string and iterate to next, previous, first and last permutations in the whole permutations sequence.

  Performance   Level  
Name: Jelle Sebreghts <contact>
Classes: 7 packages by
Country: Belgium Belgium
Age: 30
All time rank: 14909 in Belgium Belgium
Week rank: 278 Up1 in Belgium Belgium Up
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Nominee: 4x

Details

Generates (lexographical) permutations.

Build Status Code Climate Test Coverage Issue Count

use Jelle_S\Util\Permutation\LexographicalPermutation;
$number = 12345;
$next = LexographicalPermutation::getNextPermutation($number);
print "The next lexographical permutation of {$number} is {$next}.\n";

$number = 32154;
$previous = LexographicalPermutation::getPreviousPermutation($number);
print "The previous lexographical permutation of {$number} is {$previous}.\n";

$first = LexographicalPermutation::getFirstPermutation($number);
print "The first lexographical permutation of {$number} is {$first}.\n";

$last = LexographicalPermutation::getLastPermutation($number);
print "The last lexographical permutation of {$number} is {$last}.\n";

$number = 3124;
$all = print_r(LexographicalPermutation::getAllPermutations($number), TRUE);
print "All lexographical permutations of {$number} are \n{$all}\n";

Output:

The next lexographical permutation of 12345 is 12354.
The previous lexographical permutation of 32154 is 32145.
The first lexographical permutation of 32154 is 12345.
The last lexographical permutation of 32154 is 54321.
All lexographical permutations of 3124 are
Array
(
    [0] => 1234
    [1] => 1243
    [2] => 1324
    [3] => 1342
    [4] => 1423
    [5] => 1432
    [6] => 2134
    [7] => 2143
    [8] => 2314
    [9] => 2341
    [10] => 2413
    [11] => 2431
    [12] => 3124
    [13] => 3142
    [14] => 3214
    [15] => 3241
    [16] => 3412
    [17] => 3421
    [18] => 4123
    [19] => 4132
    [20] => 4213
    [21] => 4231
    [22] => 4312
    [23] => 4321
)
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  Files folder image Files  /  src  
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  Plain text file LexographicalPermutation.php Class Class source

  Files folder image Files  /  tests  
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  Plain text file LexographicalPermutationTest.php Class Class source

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