用大括号将字符串拆分为数组

Question

如何将OPTIONS列拆分为数组，其中数组的索引将为字符串中的数字。例如，使用此

[OPTIONS] => {0: 'phy','chem','bio'},{1: 'webtech','algo'}

将导致

Array

(

    [0] => [

        [0] => 'phy',

        [1] => 'chem',

        [2] => 'bio'

    ],

    [1] => [

        [0] => 'webtech',

        [1] => 'algo'

    ]

)

Index.php

<?php

    try {

        $pdo = new PDO('mysql:host=localhost;dbname=mydb','root','');

        $pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);

    } catch (PDOException $e) {

        die("Eror");

    }

    $stmt = $pdo->query("SELECT * FROM table");

    $data = $stmt->fetchAll(PDO::FETCH_OBJ);

    foreach ($data as $key) {

        echo "<pre>";

        print_r($key);

        echo "</pre>";

    }

?>

结果

stdClass Object

(

    [ID] => 1

    [FACULTY_NAME] => APPLIED SCIENCE

    [DEPT] => SLT,COMPUTER SCIENCE,FOOD TECHNOLOGY,NUD,HMT,

    [OPTIONS] => {0: 'phy','chem','bio'},{1: 'webtech','algo'}

)