Swapping two variables in PHP

In my last post at some point in the code I had to do a variable swap (to assign the value of the second variable to the first and vice-versa). To do this I used a third temporary variable to hold the content of the first variable so it’s value won’t be lost.

$temp = . . . → Read More: Swapping two variables in PHP

PHP function to generate all permutations

To generate all permutations of a given set means to find all possible ways the elements of the set can be arranged. For example, if the given set is {1, 2, 3} the permutations are:

1 2 3 1 3 2 2 1 3 2 3 1 3 1 2 3 2 1

The number . . . → Read More: PHP function to generate all permutations

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