Pre/Post inc (Was array conversion)

On 20 February 2010 11:18,  <[email protected]> wrote:
> Or:
>
> $a = array ('Cats', 'white', 'Dogs', 'black', 'Mice', 'grey', 'Camels', 'brown');
> $b = '';                                // Just in case it has some leftover value
> $k = 2* (int) (count ($a)/2);   // ensure even no of terms
> $i = 0; while ($i < $k)
>        {
>        $b[$a[$i++]] = $a[$i++];  // ***
>        }
>
> And this works:
> $i = 0; $k = array_keys($b);
> while ($i < count($b)) {        echo '<h5>'.$i.': '.$k[$i].' = '. $b[$k[$i++]].'</h5>'; }
>
> 0: Cats = white
> 1: Dogs = black
> 2: Mice = grey
> 3: Camels = brown
>
> ( *** I have always been wary of using statements like this because I was unsure when the
> incrementing would occur, so I tried it.)
>
> Clancy


<?php
$i = 10;
echo $i++; // Shows 10 and $i becomes 11
echo ++$i; // $i becomes 12 and 12 is shown.
?>

Post increment and pre increment.

No need to be "wary" of them.

http://docs.php.net/manual/en/language.operators.increment.php

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