比较和排序2d数组在php中的子值

Question

I have seen so many duplicate questions for these.Really sorry for duplicate question.But not found the correct solution or may be not get correct logic. I have already used usort() for these. I have following array.

Array
(
    [0] => stdClass Object
        (
            [id] => 808
            [ScreenName] => Dispatch
            [OriginalName] => First Unit on Scene
            [OriginalPrintName] => First Unit on Scene
            [CurrentName] => Blank
        )

    [1] => stdClass Object
        (
            [id] => 809
            [ScreenName] => Dispatch
            [OriginalName] => EMS Agency
            [OriginalPrintName] => EMS Agency
            [CurrentName] => Blank
        )

    [2] => stdClass Object
        (
            [id] => 597
            [ScreenName] => Dispatch
            [OriginalName] => Date
            [OriginalPrintName] => Date
            [CurrentName] => Date 
        )
    [3] => stdClass Object
        (
            [id] => 509
            [ScreenName] => Dispatch
            [OriginalName] => Incident #
            [OriginalPrintName] => Incident #
            [CurrentName] => Incident #
        )
    [4] => stdClass Object
        (
            [id] => 758
            [ScreenName] => Dispatch
            [OriginalName] => Run# /Call #
            [OriginalPrintName] => Run#
            [CurrentName] => Run Call 
        )
)

By using following condition

if (($y2->CurrentName == "") || ($y2->CurrentName == "Blank")) {
    print  $y2->OriginalName ;
} else {
    print  $y2->CurrentName ;
}

In list, printing all CurrentName but If currenName is blank then printing OriginalName
something like these.

Date
Incident #
Run Call
Type Of Service Req
Complaint Reported
Response Urgency
Location Type
Address Type
Address
Address Cont

I want to show these list albhabetically sorted. My usort() function is

    usort($yvals, function ($elem1, $elem2) {
      if (($elem1->CurrentName == "" || $elem1->CurrentName == "Blank") && ($elem2->OriginalName == "" || $elem2->OriginalName == "Blank")) {
      return strcmp($elem1->OriginalName, $elem2->OriginalName);
  }else if(($elem1->CurrentName != "" || $elem1->CurrentName != "Blank") && ($elem2->CurrentName == "") || ($elem2->CurrentName == "Blank")){
       return strcmp($elem1->CurrentName, $elem2->OriginalName);
  }else{
     return strcmp($elem1->CurrentName, $elem2->CurrentName);
  }
});

Its working somewhere but not for all.

Answer 1

尝试使用strcasecmp代替strcmp ......

Answer 2

This might be not optimal, but my experience with iterating over objects in php in some cases can produce counter-intuitive results, for the sake of simplicity I would separate sorting from filtering which you trying to achieve in one go. Also parenting your objects to a working class and moving the name retrieval to a method would be good programming practice.

class SomeWorkingClass{
    public function getProperName(){
    // proper name retrieval functionality
  }
}

usort($yvals, function ($elem1, $elem2) {
     return strcmp($elem1->getProperName(), $elem2->getProperName());
}