CODEWITHSUNDEEP
phpsortingobjectusort
EGr
EGr

Reputation: 2172

Is it possible to sort objects by multiple properties using usort in PHP?

I have an object that is somewhat like this:

<?php
class Change {
        private $prop1, $prop2, $prop3;

        public function __construct($prop1, $prop2, $prop3) {
                $this->$prop1=$prop1;
                $this->$prop2=$prop2;
                $this->$prop3=$prop3;
        }

        public function getProp1() {
                return $this->prop1;
        }

        public function getProp2() {
                return $this->prop2;
        }

        public function getProp3() {
                return $this->prop3;
        }
}
?>

I've removed some of the details, but that is generally what the objects are. Right now, I want to sort objects with prop1 not equal to NULL at the top then sort by specific values for prop2. Prop2 can be equal to "High", "Medium", "Low", "Critical", or any other value the user enters. I want to sort them in this order: Critical, High, Medium, Low, everything else. Finally, I want to sort on prop3 alphabetically.

Is this possible in to do with usort? Is there an easier way?

Sort Order:

Upvotes: 0

Views: 591

Answers (1)

Valentin Logvinskiy
Valentin Logvinskiy

Reputation: 121

function sort($a,$b){
    $criteria = array('Critical'=>4,'High'=>3,'Medium'=>2,'Low'=>1);
    if($a.Prop1 != NULL && $b.Prop1 == NULL) return -1;
    if($criteria[$a.Prop2] != $criteria[$b.Prop2]) {
        if($criteria[$a.Prop2] < $criteria[$b.Prop2]){
            return -1;
        }else{
            return 1;
        }
    }
    return strcmp($a.Prop3,$b.Prop3);
}

Sorry, I don't test it, but it must work in this way

Upvotes: 1

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