note 94839 modified in function.usort by danbrown
| From: | danbrown@php.net | Date: | Fri, 27 Nov 2009 19:44:01 +0000 |
| Subject: | note 94839 modified in function.usort by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-163347@lists.php.net to get a copy of this message | ||
For anyone else sorting mixed RSS feeds in date order, here's an example of the perhaps not so
obvious way of calling a method from the same class using usort():
<?php
class MyAggregator {
static function cmp_pubdate( $a, $b ) {
$a_t = strtotime( $a['pubdate'] ) ;
$b_t = strtotime( $b['pubdate'] ) ;
if( $a_t == $b_t ) return 0 ;
return ($a_t > $b_t ) ? -1 : 1;
}
// assemble arrays for display in date order
function all_documents(){
$all_data = array_merge (
$this->upcoming(), $this->past() ) ;
// Use within its own class using the $this syntax so:
usort( $all_data, array( $this , "cmp_pubdate" ) ) ;
return $all_data ;
}
}
?>
As previously said, use as a static function in other parts of your code:
<?php usort ( $a, array( "MyAggregator", "cmp_pubdate" ) ) ; ?>
--was--
For anyone else sorting mixed RSS feeds in date order, here's an example of the perhaps not so
obvious way of calling a method from the same class using usort():
class MyAggregator {
static function cmp_pubdate( $a, $b ) {
$a_t = strtotime( $a['pubdate'] ) ;
$b_t = strtotime( $b['pubdate'] ) ;
if( $a_t == $b_t ) return 0 ;
return ($a_t > $b_t ) ? -1 : 1;
}
// assemble arrays for display in date order
function all_documents(){
$all_data = array_merge (
$this->upcoming(), $this->past() ) ;
// Use within its own class using the $this syntax so:
usort( $all_data, array( $this , "cmp_pubdate" ) ) ;
return $all_data ;
}
}
As previously said, use as a static function in other parts of your code:
usort ( $a, array( "MyAggregator", "cmp_pubdate" ) ) ;
http://php.net/manual/en/function.usort.php