[PHP知识库]php 判断数组 是否在当前数组

public static function in($areaDatas,$point) {
        $areaArrs = [];
        if (!empty($areaDatas)) {
            foreach ($areaDatas as $pos) {
                $areaArrs[] = [$pos['lng'], $pos['lat']];
            }
        }

        $count = count($areaArrs);
        $vertx = [];
        $verty = [];
        foreach ($areaArrs as $r) {
            $vertx[] = $r[0];
            $verty[] = $r[1];
        }

        $cols = [
            'count' => $count,
            'vertx' => $vertx,
            'verty' => $verty
        ];

        $nvert = $cols['count'];
        $vertx = $cols['vertx'];
        $verty = $cols['verty'];
        $testx = $point[0];
        $testy = $point[1];
        $i = $j = $c = 0;
        for ($i = 0, $j = $nvert - 1; $i < $nvert; $j = $i++) {
            try{
                if (( ($verty[$i] > $testy) != ($verty[$j] > $testy) ) &&
                    ($testx < ($vertx[$j] - $vertx[$i]) * ($testy - $verty[$i]) / ($verty[$j] - $verty[$i]) + $vertx[$i]))
                    $c = !$c;
            }catch (\Throwable $throwable){
                $c = false;
            }

        }
        return $c;
    }