bp_sort_by_key( array $items, string|int $key, string $type = 'alpha', bool $preserve_keys = false )
Sort an array of objects or arrays by a specific key/property.
Description Description
The main purpose for this function is so that you can avoid having to create your own awkward callback function for usort().
Parameters Parameters
- $items
-
(Required) The items to be sorted. Its constituent items can be either associative arrays or objects.
- $key
-
(Required) The array index or property name to sort by.
- $type
-
(Optional) Sort type. 'alpha' for alphabetical, 'num' for numeric. Default: 'alpha'.
Default value: 'alpha'
- $preserve_keys
-
(Optional) Whether to keep the keys or not.
Default value: false
Return Return
(array) $items The sorted array.
Source Source
File: bp-core/bp-core-functions.php
function bp_sort_by_key( $items, $key, $type = 'alpha', $preserve_keys = false ) {
$callback = function( $a, $b ) use ( $key, $type ) {
$values = array( 0 => false, 1 => false );
foreach ( func_get_args() as $indexi => $index ) {
if ( isset( $index->{$key} ) ) {
$values[ $indexi ] = $index->{$key};
} elseif ( isset( $index[ $key ] ) ) {
$values[ $indexi ] = $index[ $key ];
}
}
if ( isset( $values[0], $values[1] ) ) {
if ( 'num' === $type ) {
$cmp = $values[0] - $values[1];
} else {
$cmp = strcmp( $values[0], $values[1] );
}
if ( 0 > $cmp ) {
$retval = -1;
} elseif ( 0 < $cmp ) {
$retval = 1;
} else {
$retval = 0;
}
return $retval;
} else {
return 0;
}
};
if ( true === $preserve_keys ) {
uasort( $items, $callback );
} else {
usort( $items, $callback );
}
return $items;
}
Changelog Changelog
| Version | Description |
|---|---|
| 2.7.0 | Added $preserve_keys parameter. |
| 2.2.0 | Introduced. |