On 4/19/05, Sara Golemon <[EMAIL PROTECTED]> wrote: > > Just came across this: > > http://bugs.php.net/bug.php?id=23110 > > > > I've been programming PHP since PHP 3 > > and wasn't even aware of this behavior. > > > And now you are. > > PHP is a loosely typed language. Odds are it's one of the things which > attracted you to it in the first place.
I can understand 0 == '' is true, but the string thingy is a bit surprising me. I thought === is only used when comparing different types, so it's used to strictly compare things of the same type as well? (as the case, strings, but objects come to mind as well) I guess === is a strict equality operator more than it is a type equality operator. > > "Numeric strings"? What is that? > > > Roughly speaking, a string matching the pattern: > /^(-\d)?\d*(.[0-9]*)?(E[+-]\d+)?/ > Though that's not precisely how the engine handles it internally. > > > if ($typedPassword == $password) doSomeAdministrativeTaskHere(); > > > > You better not use '000000001' as password, or '0e00.0000', since > > people would be able to use '' (yes, empty string!) to hack your app. > > > Quick! Go change your password! <?php echo '0' == '0.0000e0' ?> 1 <?php echo '0' == 'asadoaskd' ?> (nothing, false) <?php echo '0' == (int)'adasd' ?> 1 That confuses me more (but understandable, and thank God PHP behave this way)... I thought 'asdasd' is 0 when [implicitly] converted to int [for comparison]? I guess I never knew PHP well :-( -- Hendy Irawan http://www.gauldong.net http://dev.gauldong.net -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
