Re: Pre/Post inc (Was array conversion)

Richard Quadling wrote: > On 20 February 2010 11:18, <clancy_1@cybec.com.au> 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 > Expanding on what Richard says; there does seem to be a growing number of people who haven't stopped to learn the very basics of PHP (or languages in general). I'd strongly recommend that all those in doubt over the basics take a few hours out to (re-)familiarise themselves; and there's no finer resource to do this than the php manual [1] You'll notice the manual goes as follows: # Basic syntax # Types # Variables # Constants # Expressions # Operators # Control Structures # Functions ... more And that's the order in which you should learn; in short you can't really program or script without knowing basics through control structures. Do hope this mail doesn't sound condescending in any way; as it's meant with the best intentions and really will make you're (working) life a lot easier. I myself still refer back to these base sections periodically, and every time I do - a new detail pops out that makes something easier. [1] http://docs.php.net/manual/en/langref.php Many Regards, Nathan