note 97535 added to function.strlen

As noted below (01-Jul-2007), you can use strlen() to determine if an expression has content, i.e. is anything (including object, array, resource) other than null or the empty string. This works because, for non-strings, strlen() returns the length of the string conversion of the expression, so it is non-zero for most non-strings: strlen($array)=5 because (string)@array='Array' strlen($resource) is about 14 because (string)$resource is of the form 'Resource id #9' Exception: strlen($object) causes a fatal error unless the class has the __toString method defined, so you have to test is_object($object) before strlen(). Result: (is_object($expression)||strlen($expression)) is false only if $expression is null or the empty string ---- Server IP: 69.147.83.197 Probable Submitter: 71.169.17.211 ---- Manual Page -- http://www.php.net/manual/en/function.strlen.php Edit -- https://master.php.net/note/edit/97535 Del: integrated -- https://master.php.net/note/delete/97535/integrated Del: useless -- https://master.php.net/note/delete/97535/useless Del: bad code -- https://master.php.net/note/delete/97535/bad+code Del: spam -- https://master.php.net/note/delete/97535/spam Del: non-english -- https://master.php.net/note/delete/97535/non-english Del: in docs -- https://master.php.net/note/delete/97535/in+docs Del: other reasons-- https://master.php.net/note/delete/97535 Reject -- https://master.php.net/note/reject/97535 Search -- https://master.php.net/manage/user-notes.php