notes

multi_array_sort

<code>
, <?php
, // json data
, $event_data = 
, 
,     {
,         DQevent_idDQ: DQ1DQ,
,         DQevent_dateDQ: DQ2020-11-22DQ,
,         DQevent_begin_timeDQ: DQ09:00:00DQ,
,         DQevent_end_timeDQ: DQ09:45:00DQ,
,         DQevent_nameDQ: DQChair YogaDQ,
,         DQevent_spaceDQ: DQ5DQ,
,         DQevent_signed_upDQ: 1
,     },
,     {
,         DQevent_idDQ: DQ3DQ,
,         DQevent_dateDQ: DQ2020-11-30DQ,
,         DQevent_begin_timeDQ: DQ09:00:00DQ,
,         DQevent_end_timeDQ: DQ09:45:00DQ,
,         DQevent_nameDQ: DQChair YogaDQ,
,         DQevent_spaceDQ: DQ5DQ,
,         DQevent_signed_upDQ: 4
,     },
,     {
,         DQevent_idDQ: DQ2DQ,
,         DQevent_dateDQ: DQ2020-11-16DQ,
,         DQevent_begin_timeDQ: DQ09:00:00DQ,
,         DQevent_end_timeDQ: DQ09:45:00DQ,
,         DQevent_nameDQ: DQChair YogaDQ,
,         DQevent_spaceDQ: DQ5DQ,
,         DQevent_signed_upDQ: 1
,     }
, 
, ;
, 
, //$event_data = file_get_contents(events.json);
, $event_data = json_decode($event_data);
, 
, function sort_by_element($a, $b) {
,     return $a->event_date > $b->event_date;
, }
, 
, echo DQBefore sorting by dateDQ;
, echo DQ<pre>DQ;
, 
, print_r($event_data);
, echo DQ</pre>DQ;
, 
, 
, 
, usort($event_data, sort_by_element); 
, 
, echo DQAfter sorting by dateDQ;
, echo DQ<pre>DQ;
, print_r($event_data);
, echo DQ</pre>DQ;
, 
, 
, 
, 	
, ?>
, 
, </code>
, <code>
, https://johnmorrisonline.com/how-to-sort-multidimensional-arrays-using-php/
, 
, <?php
, 
, $event_data = file_get_contents(events.json);
, $event_data = json_decode($event_data);
, 
, 
, $arr = 	array(
, 		array(name => John, age => 30, website => http://learnphp.co),
, 		array(name => Joe, age => 28, website => http://johnmorrisonline.com),
, 		array(name => Amy, age => 32, website => http://amy.com),
, 		array(name => Alex, age => 22, website => http://thealex.com),
, 		array(name => Pat, age => 40, website => http://patsjourney.com),
, );
, 	
, ?>
, 
, <pre><?php //print_r($arr); ?></pre>
, <?php //array_multisort($arr); ?>
, <pre><?php //print_r($arr); ?></pre>
, 
, <?php
, 	function val_sort($array,$key) {
, 	
, 	//Loop through and get the values of our specified key
, 	foreach($array as $k=>$v) {
, 		$b = strtolower($v$key);
, 	}
, 	
, 	//print_r($b);
, 	
, 	asort($b);
, 	
, 	//echo <br />;
, 	//print_r($b);
, 	
, 	foreach($b as $k=>$v) {
, 		$c = $array$k;
, 	}
, 	
, 	return $c;
, }
, $sorted = val_sort($arr, name);
, ?>
, 
, <pre><?php print_r($sorted); ?></pre>
, 
, </code>