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@ 2013-12-09T20:19:42Z

<?php
$a = array('leg1'=>'LA', 'leg2'=>'NY', 'leg3'=>'NY', 'leg4'=>'NY', 'leg5'=>'FL');

while($current = current($a)) {
    if(next($a) == $current && next($a) == $current){
       //staying put for next two legs
       echo $current;
    }
}

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next: documentation ( source)
current: documentation ( source)

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56.59 ms | 402 KiB | 5 Q