Re: Boolean Assignment Operator

On Mon, Feb 2, 2009 at 7:49 AM, Gavin Hodge <gavin.hodge@gmail.com> wrote: > Hi, > > I'm fairly new to PHP, having migrated from the Java / C# world. > > I wrote some code similar to the following: > > $success = true; > $success &= operation1(); > $success &= operation2(); > > if ($success === true) { > operation3(); // depends on 1 and 2 being successful > } > > This didn't work as expected. After a bit of digging I found: > * The &= operation isn't mentioned anywhere in the PHP documentation > * The &= function seems to work as expected, however the following is > observed... > $success = true; > $success &= true; > print $success == true; // outputs 1 > print $sucesss === true; // no output > * The 'or' assignment operator |= causes no errors but doesn't work. > > Can any PHP gurus explain why the &= operator works at all, and why > === seems to fail afterwards? > > Cheers, > Gavin. > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > http://us.php.net/manual/en/language.operators.bitwise.php You're doing an AND, then assigning it when you say &=. Think of it like doing something such as .= or +=. You might also be confusing &= with =& where =& means assign by reference. This used to be very necessary when dealing with php4 oop, but isn't so much anymore. -- http://www.voom.me | EFnet: #voom