https://www.schoolofnet.com/forum/topico/tratamento-de-strings-2437

index.php

<?php

$strBD = "POLYGON((-22.886145457836463 -43.118764097835, -22.88643210096987 -43.118324215556555, -22.886694032959 -43.117846782351904, -22.886763222456636 -43.11767512097496, -22.886782990878046 -43.117605383540564, -22.886886775043237 -43.11763757004875, -22.887133879879073 -43.11891966595787, -22.88630360584699 -43.11942392125267, -22.886115805063966 -43.118823106433325, -22.886145457836463 -43.118764097835))";

$newStr = str_replace('POLYGON((','',$strBD);
$newStr = str_replace('))','',$newStr);

$array = explode(',',$newStr);
$newArray = [];
foreach ($array as $item){
    $subArray = explode(' ',$item);
    $newArray[] = [
        'lat' => $subArray[0],
        'long' => $subArray[1],
        ];
}

var_dump($newArray);