Re: Merging Strings

[Jochem Maas <jochem@xxxxxxxxxxxxx>]

Rolf van de Krol wrote:
> Hi all,
>
> why do result the following two examples in two different value for $month?
> (1)

$current_date = getdate(time());
$month        = strval($current_date['year']);
$month       .= (strlen(strval($current_date['mon'])) == 2)
              ? $current_date['mon']	
              : ("0".$current_date['mon']);

$current_date = getdate(time());
$month        = strval($current_date['year']) . (strlen(strval($current_date['mon'])) == 2)                  ? 
$current_date['mon']
              : ("0".$current_date['mon']);

in the second version:

strval($current_date['year']) . (strlen(strval($current_date['mon'])) == 2)

is equal to TRUE, therefore $current_date['mon'] is returned, you are missing
parentheses around the tertiary expression (?:).... so:

$current_date = getdate(time());
$month        = strval($current_date['year']) .
	      ((strlen(strval($current_date['mon'])) == 2) ? $current_date['mon'] : "0".$current_date['mon']);



btw, have a look at str_pad:

$current_date = getdate();
$month        = str_pad($current_date['mon'], 2, "0", STR_PAD_LEFT);
echo $month;

> The first example sets $month to 200505 and the second sets it to 5. Why is
> that. In my opinion they both should set it to 200505.
> Is this a weird bug, or did i something wrong?
>
> I'm using PHP 4.3.10 with Apache 1.3.33 on W2K Pro, but the server of my
> hosting provider does the same (php 4.3.10 + apache (don't know the version,
> i guess 1.3.33) on linux (i'm not sure, but i thought it was redhat)).
>
> Rolf van de Krol

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