note 68303 added to function.isset

I tried the example posted previously by Slawek: $foo = 'a little string'; echo isset($foo)?'yes ':'no ', isset($foo['aaaa'])?'yes ':'no '; He got yes yes, but he didn't say what version of PHP he was using. I tried this on PHP 5.0.5 and got: yes no But on PHP 4.3.5 I got: yes yes Apparently, PHP4 converts the the string 'aaaa' to zero and then returns the string character at that position within the string $foo, when $foo is not an array. That means you can't assume you are dealing with an array, even if you used an expression such as isset($foo['aaaa']['bbb']['cc']['d']), because it will return true also if any part is a string. PHP5 does not do this. If $foo is a string, the index must actually be numeric (e.g. $foo[0]) for it to return the indexed character. ---- Server IP: 216.194.113.175 Probable Submitter: 65.213.231.9 ---- X-Spam-Status: No, hits=3.1 required=5.0 tests=DATE_MISSING,FROM_NO_LOWER autolearn=no version=2.64 ---- Manual Page -- http://www.php.net/manual/en/function.isset.php Edit -- http://master.php.net/note/edit/68303 Del: integrated -- http://master.php.net/note/delete/68303/integrated Del: useless -- http://master.php.net/note/delete/68303/useless Del: bad code -- http://master.php.net/note/delete/68303/bad+code Del: spam -- http://master.php.net/note/delete/68303/spam Del: non-english -- http://master.php.net/note/delete/68303/non-english Del: in docs -- http://master.php.net/note/delete/68303/in+docs Del: other reasons-- http://master.php.net/note/delete/68303 Reject -- http://master.php.net/note/reject/68303 Search -- http://master.php.net/manage/user-notes.php