Déplacez tous les événements qui commencent à la date actuelle vers le haut du tableau, mais laissez les autres ordonnés tels quels!
$today = date('Ymd',strtotime('today'));
usort($events,function($a,$b) use($today){
if($a['start_date'] === $today && $b['start_date'] != $today){return -1;}
else if($b['start_date'] === $today && $a['start_date'] != $today){return 1;}
else {return strnatcmp($a['start_date'],$b['start_date']);}
});
ou trier les événements par date de début
usort($events,function($a,$b){
return strnatcmp($a['start_date'],$b['start_date']);
});
ou trier les événements par date de fin
usort($events,function($a,$b){
return strnatcmp($a['end_date'],$b['end_date']);
});
EDIT Certaines données de test:
//example works best if today is 20170810
$events = array(
array(
'name' => 'a',
'start_date' => '20170810',
'end_date' => '20170811',
),
array(
'name' => 'b',
'start_date' => '20170810',
'end_date' => '20170810',
),
array(
'name' => 'c',
'start_date' => '20170607',
'end_date' => '20170608',
),
array(
'name' => 'd',
'start_date' => '20170607',
'end_date' => '20170607',
),
array(
'name' => 'e',
'start_date' => '20170810',
'end_date' => '20170812',
),
array(
'name' => 'f',
'start_date' => '20170807',
'end_date' => '20170817',
),
);
print_r($events);
EDIT: Tous ensemble: Les événements sont classés par 'Sont-ils à partir d'aujourd'hui?', 'Start_date', 'date_fin'
$today = date('Ymd',strtotime('today'));
usort($events,function($a,$b) use($today){
//one of them starts today
if($a['start_date'] === $today && $b['start_date'] != $today){return -1;}
else if($b['start_date'] === $today && $a['start_date'] != $today){return 1;}
//both or neither start today, compare start_date
else {
if($a['start_date'] != $b['start_date']){
//start_dates differ, order by them
return strnatcmp($a['start_date'],$b['start_date']);
} else {
//start dates are the same, order by end_date
return strnatcmp($a['end_date'],$b['end_date']);
}
}
});
print_r($events);
EDIT: En cours Les événements sont classés par « sont ? ils actuellement en cours « « start_date », « date_fin »
$today = date('Ymd',strtotime('today'));
//function compares two elements to decide their position relative to each other
usort($events,function($a,$b) use($today){
//check if event is currently ongoing
//starts or ends today or today is between start and end
$ongoing = function($event) use($today){
//this is the simplest form I could think of for the check
return (strnatcmp($event['start_date'],$today) < 1 && strnatcmp($today,$event['end_date']) < 1);
};
$startstoday = function($event) use($today){
return $event['start_date'] === $today;
};
//only one of them is ongoing
if($ongoing($a) && !$ongoing($b)){return -1;}
else if($ongoing($b) && !$ongoing($a)){return 1;}
//both or neither are ongoing, compare start_date
else {
if($a['start_date'] != $b['start_date']){
//start_dates differ, order by them
return strnatcmp($a['start_date'],$b['start_date']);
} else {
//start dates are the same, order by end_date
return strnatcmp($a['end_date'],$b['end_date']);
}
}
});
print_r($events);
EDIT: aUJOURD'HUI ET MISE eN cONTINU Les événements sont classés par « ? sont-ils à partir d'aujourd'hui », » Est ? Ils actuellement en cours », « start_date », « date_fin »
$today = date('Ymd',strtotime('today'));
//function compares two elements to decide their position relative to each other
usort($events,function($a,$b) use($today){
//check if event is currently ongoing
//starts or ends today or today is between start and end
$ongoing = function($event) use($today){
//this is the simplest form I could think of for the check
return (strnatcmp($event['start_date'],$today) < 1 && strnatcmp($today,$event['end_date']) < 1);
};
//only one of them is ongoing
if($ongoing($a) && !$ongoing($b)){return -1;}
else if($ongoing($b) && !$ongoing($a)){return 1;}
//both are ongoing
else if($ongoing($a) && $ongoing($b)){
//one starts today
if($a['start_date'] === $today && $b['start_date'] != $today){return -1;}
else if($b['start_date'] === $today && $a['start_date'] != $today){return 1;}
//both start today
else if($a['start_date'] === $today && $b['start_date'] === $today){
return strnatcmp($a['end_date'],$b['end_date']);
}
//none starts today
else {
if($a['start_date'] != $b['start_date']){
//start_dates differ, order by them
return strnatcmp($a['start_date'],$b['start_date']);
} else {
//start dates are the same, order by end_date
return strnatcmp($a['end_date'],$b['end_date']);
}
}
} else {
//neither are ongoing, compare start_date
if($a['start_date'] != $b['start_date']){
//start_dates differ, order by them
return strnatcmp($a['start_date'],$b['start_date']);
} else {
//start dates are the same, order by end_date
return strnatcmp($a['end_date'],$b['end_date']);
}
}
});
print_r($events);
ET CE DERNIER PEUT ÊTRE SIMPLIFIÉE À:
$today = date('Ymd',strtotime('today'));
usort($events,function($a,$b) use($today){
$ongoing = function($event) use($today){
return (strnatcmp($event['start_date'],$today) < 1 && strnatcmp($today,$event['end_date']) < 1);
};
if($ongoing($a)){
if(!$ongoing($b)){return -1;}
else {
if($a['start_date'] === $today && $b['start_date'] != $today){return -1;}
else if($b['start_date'] === $today && $a['start_date'] != $today){return 1;}
}
} else if($ongoing($b)){return 1;}
if($a['start_date'] != $b['start_date']){
return strnatcmp($a['start_date'],$b['start_date']);
} else {
return strnatcmp($a['end_date'],$b['end_date']);
}
});
print_r($events);
Voulez-vous trois types de tri ou de toutes ces règles dans un ? –