Re: Function shall receive Pointer to Array

On Wed, May 4, 2005 3:29 pm, Fred Rathke said: > how can a function get a pointer to an array? This does not work. I use > PHP4. Technically, in PHP, they are references, not pointers. There are no pointers in PHP. The difference is too subtle for me to understand it, but there is apparently some meaningful difference. > $t = array("test" => "unchanged"); > echo "<br>testarray > unchanged:\"".$t['test']."\""; > changearray($t); > echo "<br>testarray hopefully > changed:\"".$t['test']."\""; > > function changearray(&$myarray) { > $myarray['test'] = "changed"; > } -bash-2.05b$ php -a Interactive mode enabled <?php $t = array("test" => "unchanged"); echo "<br>testarray unchanged:\"".$t['test']."\""; changearray($t); echo "<br>testarray hopefully changed:\"".$t['test']."\""; function changearray(&$myarray) { $myarray['test'] = "changed"; } ?> Content-type: text/html X-Powered-By: PHP/4.3.11 <br>testarray unchanged:"unchanged"<br>testarray hopefully changed:"changed" -bash-2.05b$ So it works in 4.3.11 Exactly which version of PHP are you one -- minor version numbers included. The behaviour of & changed several times over the course of PHP's history, which makes meaningful discussion difficult without precision in version information. > Before I tried it on my own I read this page: > http://de2.php.net/manual/en/language.references.whatdo.php > > Be so nice to search for this string: "The second thing references do > is to pass variables by-reference. This is done by making a local > variable in a function and a variable in the calling scope reference > to the same content. Example:" > > The following example I used. I only tried to do it with an array > instead of a variable. Actually, I would expect arrays to *ALWAYS* have worked in PHP... But maybe that's just my shoddy memory. Plus I rarely send arrays around in functions and try to alter their contents. Just a question of programming style, I guess. > What I need to read again to find my own mistake? I know some of php's > commands work with an internal copy of a content. foreach() does that for sure. -- Like Music? http://l-i-e.com/artists.htm