正如乌穆德指出的，你可以使用 explode 要将字符串拆分为一个值数组，然后遍历该列表-http://php.net/manual/en/function.explode.php
下面，我定义了一个新函数 ordinal 它将输出第1，第2，第3等给定的任何数字。
除此之外，你还可以 sprintf 使用占位符格式化字符串。
前任amplehttp://sandbox.onlinephpfunctions.com/code/1459ec55d6bc9f28a03645625a22261ede093342
编辑添加的代码以打开错误报告。

<?php
// Turn on error reporting
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
// Turn MySQL errors into PHP exceptions
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
// Establish DB connection
$db = new mysqli("localhost","username","password","dbname");
$sql = "select * from tbldatingusermaster order by userid desc";
$result = $db->query($sql);
while($data = $result->fetch_object()){
    // Split the list of values into an array
    $arrayOfEducationValues = explode(',', $data->education);
    // Define what you want your output to look like.
    $format = "My %s value is %d \n";
    // Loop over the list of values and then output each one using the 
    // formatted string
    foreach ($arrayOfEducationValues as $key => $education) {
        // `$key` here refers to current index of the array. Since
        // array idexes usually start at 0 you need to add `1` to it.
        echo sprintf($format, ordinal($key+1), $education);
    }
}
/*
* Taken from https://stackoverflow.com/a/3110033/296555
* /
function ordinal($number) {
    $ends = array('th','st','nd','rd','th','th','th','th','th','th');
    if ((($number % 100) >= 11) && (($number%100) <= 13))
        return $number. 'th';
    else
        return $number. $ends[$number % 10];
}

$education = explode(',', $data->education); // explode it using comma 
for($i=0;$i<count($education);$i++){ // iterate the array
    echo $education[$i];
 }