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viralgh/swap.php

Created September 16, 2015 11:32
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swap.php
<?php
$a = 5;
$b = 2;
// status after evaluation
// initaial 5,2
$a = $a + $b; // 7,2
$b = $a - $b; // 7,5
$a = $a - $b; // 2,5
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