Re: Custom function

"Andre Polykanine" <andre@oire.org> wrote: >Hello Ashley, > >By the way, the non-last optional parameter can't be missed, am I >right? In some languages we could write something like: >function test ($a, $foo=50, $bar=true) { >// ... >} > >Then call it like this: > >$m=test("blah", , false); > >meaning > >$m=test("blah", 50, false); >This is impossible in PHP, isn't it? >Thanks! > >-- >With best regards from Ukraine, >Andre >Skype: Francophile >My blog: http://oire.org/menelion (mostly in Russian) >Twitter: http://twitter.com/m_elensule >Facebook: http://facebook.com/menelion > >------------ Original message ------------ >From: Ashley Sheridan <ash@ashleysheridan.co.uk> >To: Ron Piggott >Date created: , 1:37:59 AM >Subject: [PHP] Custom function > > > On Mon, 2011-05-02 at 18:28 -0400, Ron Piggott wrote: > >> On Mon, May 2, 2011 at 3:16 PM, Ron Piggott ><ron.piggott@actsministries.org> wrote: >> >> >> Is it possible to write a function with an optional flag? What >would the syntax look like? >> >> So far I have: >> >> function load_advertisement( $web_page_reference , >$web_advertising_sizes_reference ) { >> >> >> >> Hi Ron: >> >> I'm not sure what you mean by "optional flag"? Do you mean an >optional parameter? >> >> Richard >> >> >> Correct Richard. Ron > > >function load_advertisement( $web_page_reference , >$web_advertising_sizes_reference=default_value) > >This sets a default value for a parameter, which you can check for >within the function itself and use it if it differs from what you set. >Set it to something that it shouldn't be, like null or something. > >Also note that these parameters have to occur after any that don't have >a default value > >-- >Thanks, >Ash >http://www.ashleysheridan.co.uk > > > >-- >PHP General Mailing List (http://www.php.net/) >To unsubscribe, visit: http://www.php.net/unsub.php Yes, it behaves like any built-in php function in that respect, you can't omit a parameter mid-way in a param list. However, you can give it a dummy value that you can look for and ignore in your code, but it gets a little more complex then. I did forget to mention that a function also has a special func_get_args() method that can be used to access parameters sent to the function that weren't in the function declaration. Thanks Ash -- Sent from my Android phone with K-9 Mail. Please excuse my brevity.