How to use Javascript variable inside PHP code in Script

I have public static function with parameter in my controller. I need to use this function inside javascript which is in for loop. How can I use JS for loop variable inside php vairble as array count?

Here is example of code:

var passedArray = {!! json_encode($elanlar)!!};
var passedArrayRegion = {!! json_encode($region)!!};

for (var i = 0; i < my_count; i++) {
  console.log('lat: '+passedArray[i]['Coordinatex']+ ' lng: '+passedArray[i]['Coordinatey'] )
  Ldata.info.push({
      "placeName" : passedArray[i]['Column1']+ ' '++' '+ passedArrayRegion[passedArray[i]['Column3']]['Column4']
   });
}

i here is JS variable

I have tried so much variants and read so much in forum, but couldn`t fin an answer. How to use js variable i in this condition?

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