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  • Swap two variables value without using third variable in php

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    Here is a method. How to swap two variables value without using third variable and temp variable.

    $a = 3;
    $b = 2;
    $a = $a + $b; // 3 + 2 = 5
    $b = $a - $b; // 5 - 2 = 3
    $a = $a - $b; // 5 - 3 = 2
    print $a;
    print $b;
    
    Output:
    2
    3 
    

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