[PHP] Re: !== (was Re: [PHP] how many files are in a directory)
Here is an example that might help. $a = 1; if($a) echo '1'; if($a == true) echo '2'; if($a === true) echo '3'; The first and second conditional statements execute but the third doesn't. This is because $a evaluates to true but is not of type 'boolean'. === and !== not only compare value but type as well. Justin Garrett "Chris Boget" <[EMAIL PROTECTED]> wrote in message 07bb01c243c2$1b3045a0$8c01a8c0@ENTROPY">news:07bb01c243c2$1b3045a0$8c01a8c0@ENTROPY... > > // Note that !== did not exist until 4.0.0-RC2 > > I took a quick look at the docs to find out what !== meant > (because I'd never seen it before). I'm not sure I understand > what it's use is. Could someone explain why you would use > it and for what purpose? > I couldn't really infer from the example that was included in > the previous message. > > thnx, > Chris > > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] !== (was Re: [PHP] how many files are in a directory)
[snip] > // Note that !== did not exist until 4.0.0-RC2 I took a quick look at the docs to find out what !== meant (because I'd never seen it before). I'm not sure I understand what it's use is. Could someone explain why you would use it and for what purpose? [/snip] $a !== $b Not identical TRUE if $a is not equal to $b, or they are not the same data type $a = 2 $b = "2" If $a and $b are not the same data type they ARE NOT IDENTICAL $a is an integer, $b is a string or $a = 2 $b = 3 They are the same data type (integer), but they ARE NOT EQUAL I would use strcomp() to compare strings against other strings though, since data types like this may cause problems since PHP variables are loosely typed. HTH! Jay -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] !== (was Re: [PHP] how many files are in a directory)
> // Note that !== did not exist until 4.0.0-RC2 I took a quick look at the docs to find out what !== meant (because I'd never seen it before). I'm not sure I understand what it's use is. Could someone explain why you would use it and for what purpose? I couldn't really infer from the example that was included in the previous message. thnx, Chris -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how many files are in a directory
Op woensdag 14 augustus 2002 20:00, schreef Harry.de: > does anybody now a way in php to read out, > how many files are in a directory -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
