note 121893 added to function.vsprintf

It's necessary to clearly how to apply argument swapping when using an array of arguments. One might be tempted to use %0$ to reference $args[0]. In reality, the position specifier is always the array index+1: $args[0] is referenced by %1$... $args[1] is referenced by %2$... etc. Similarly, the first subpattern of a RegEx match would be found in $matches[1], the second in $match[2], etc. However if the $matches array is used as arguments to vsprint(), then the position specifier is subpattern+1: preg_match( $pattern, $subject, $matches ); vsprintf( 'Full Match = %1$s, first Subpattern = %2$s, second Subpattern = %3$s', $matches ); ---- Server IP: 208.43.231.9 Probable Submitter: 173.63.128.218 ---- Manual Page -- http://php.net/manual/en/function.vsprintf.php Edit -- https://master.php.net/note/edit/121893 Del: integrated -- https://master.php.net/note/delete/121893/integrated Del: useless -- https://master.php.net/note/delete/121893/useless Del: bad code -- https://master.php.net/note/delete/121893/bad+code Del: spam -- https://master.php.net/note/delete/121893/spam Del: non-english -- https://master.php.net/note/delete/121893/non-english Del: in docs -- https://master.php.net/note/delete/121893/in+docs Del: other reasons-- https://master.php.net/note/delete/121893 Reject -- https://master.php.net/note/reject/121893 Search -- https://master.php.net/manage/user-notes.php