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| <?php | |
| $array = [ | |
| [ 'id' => 1, 'value' => 'foo' ], | |
| [ 'id' => 1, 'value' => 'bar' ], | |
| [ 'id' => 2, 'value' => 'baz' ], | |
| ]; | |
| $groups = array_group( $array, function( $a, $b ) { | |
| return $a['id'] == $b['id']; | |
| } ); | |
| var_dump( $groups ); | |
| /* | |
| array(2) { | |
| [0]=> | |
| array(2) { | |
| [0]=> | |
| array(2) { | |
| ["id"]=> | |
| int(1) | |
| ["value"]=> | |
| string(3) "foo" | |
| } | |
| [1]=> | |
| array(2) { | |
| ["id"]=> | |
| int(1) | |
| ["value"]=> | |
| string(3) "bar" | |
| } | |
| } | |
| [1]=> | |
| array(1) { | |
| [0]=> | |
| array(2) { | |
| ["id"]=> | |
| int(2) | |
| ["value"]=> | |
| string(3) "baz" | |
| } | |
| } | |
| } | |
| */ |
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| <?php | |
| function less_than_or_equal( $a, $b ) { | |
| return $a <= $b; | |
| } | |
| $arr1 = array(1,2,2,3,1,2,0,4,5,2); | |
| var_dump( array_group($arr1, 'less_than_or_equal') ); | |
| /* | |
| array(4) { | |
| [0]=> | |
| array(4) { | |
| [0]=> | |
| int(1) | |
| [1]=> | |
| int(2) | |
| [2]=> | |
| int(2) | |
| [3]=> | |
| int(3) | |
| } | |
| [1]=> | |
| array(2) { | |
| [0]=> | |
| int(1) | |
| [1]=> | |
| int(2) | |
| } | |
| [2]=> | |
| array(3) { | |
| [0]=> | |
| int(0) | |
| [1]=> | |
| int(4) | |
| [2]=> | |
| int(5) | |
| } | |
| [3]=> | |
| array(1) { | |
| [0]=> | |
| int(2) | |
| } | |
| } | |
| */ |
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| <?php | |
| function event( $start, $end ) { | |
| return (object)array( 'start' => strtotime( $start ), 'end' => strtotime( $end ) ); | |
| } | |
| function overlaps( $ev1, $ev2 ) { | |
| $start_time1 = $ev1->start; | |
| $start_time2 = $ev2->start; | |
| $end_time1 = $ev1->end; | |
| $end_time2 = $ev2->end; | |
| return ($start_time1 <= $end_time2 && $start_time2 <= $end_time1); | |
| } | |
| $events = [ | |
| event( '2023-05-01 00:00:00', '2023-05-01 01:00:00' ), | |
| event( '2023-05-01 00:30:00', '2023-05-01 01:15:00' ), | |
| event( '2023-05-01 02:00:00', '2023-05-01 03:00:00' ), | |
| ]; | |
| $grouped = array_group( $events, 'overlaps' ); | |
| var_dump( $grouped ); // produces [ [ $events[0], $events[1] ], [ $events[2] ] ] |
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| <?php | |
| $array = [ | |
| [ 'id' => 1, 'value' => 'foo' ], | |
| [ 'id' => 1, 'value' => 'bar' ], | |
| [ 'id' => 2, 'value' => 'baz' ], | |
| ]; | |
| $groups = []; | |
| foreach ( $array as $element ) { | |
| $groups[ $element['id'] ][] = $element; | |
| } | |
| var_dump( $groups ); | |
| /* | |
| array(2) { | |
| [1]=> | |
| array(2) { | |
| [0]=> | |
| array(2) { | |
| ["id"]=> | |
| int(1) | |
| ["value"]=> | |
| string(3) "foo" | |
| } | |
| [1]=> | |
| array(2) { | |
| ["id"]=> | |
| int(1) | |
| ["value"]=> | |
| string(3) "bar" | |
| } | |
| } | |
| [2]=> | |
| array(1) { | |
| [0]=> | |
| array(2) { | |
| ["id"]=> | |
| int(2) | |
| ["value"]=> | |
| string(3) "baz" | |
| } | |
| } | |
| } | |
| */ |
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