Re: note 11883 added to language.expressions.php

Done, also edited this one to remove the request you made to the editors. --- yasuo_ohgaki@hotmail.com wrote: > [To editors: > Could you please delete my previous 2 notes? I think > this notes would be just enough. Thank you] > > Manual defines "expression is anything that has > value", Therefore, parser will give error for > following code. > > ($val) ? echo('true') : echo('false'); > Note: "? : " operator has this syntax "expr ? expr > : expr;" > > since echo does not have(return) value and ?: > expects expression(value). > > However, if function/language constructs that > have/return value, such as include(), parser > compiles code. > > Note: User defined functions always have/return > value without explicit return statement (returns > NULL if there is no return statement). Therefore, > user defined functions are always valid expressions. > > [It may be useful to have VOID as new type to > prevent programmer to use function as RVALUE by > mistake] > > For example, > > ($val) ? include('true.inc') : include('false.inc'); > > is valid, since "include" returns value. > > The fact "echo" does not return value(="echo" is not > a expression), is less obvious to me. > > Print() and Echo() is NOT identical since print() > has/returns value and can be a valid expression. > > > http://www.php.net/manual/en/language.expressions.php > > > > -- > PHP Notes Mailing List (http://www.php.net/) > To unsubscribe, e-mail: > php-notes-unsubscribe@lists.php.net > For additional commands, e-mail: > php-notes-help@lists.php.net > To contact the list administrators, e-mail: > php-list-admin@lists.php.net > ===== --- Jesus M. Castagnetto <jmcastagnetto@php.net> __________________________________________________ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/