PHP-获取数组中的项目数

Question

好的，所以我有一个 while 循环，在其中循环不同的用户:

$before = $data['autorenew_before'];
$refs=$dbh->prepare("SELECT * FROM users WHERE user_by=:userby AND expire <= unix_timestamp(CURRENT_TIMESTAMP + INTERVAL :before day)");
    #$refs->bindParam(":userby",$data['username']);
    $refs->bindParam(":userby",$userdata['username']);
    $refs->bindParam(":before",$before);
    $refs->execute();

然后我循环执行上面的查询:

while($refsData=$refs->fetch()){
$ids = "".$refsData['id'].",";
$explode = explode(",",$ids);
$outcome = _paying(number_format(getPriceList($data['rented_referrals']),2), 30, $data['username'], $explode);


}

这是_paying函数:

function _paying($ceny, $dni, $username, $referrals_array){
  //$ceny = 0.20

  //Count referrals_array doesn't return anything. 
  $koszyk = $ceny * count($referrals_array);

   return $koszyk;


}

上述函数不起作用，因为 count($referrals_array) 不起作用。

编辑 - 1:

print_r($explode); 给我:

Array
(
    [0] => 40231
    [1] => 
)
Array
(
    [0] => 40232
    [1] => 
)
Array
(
    [0] => 40233
    [1] => 
)
Array
(
    [0] => 40234
    [1] => 
)
Array
(
    [0] => 40235
    [1] => 
)
Array
(
    [0] => 55847
    [1] => 
)
Array
(
    [0] => 55848
    [1] => 
)
Array
(
    [0] => 90322
    [1] => 
)
Array
(
    [0] => 90323
    [1] => 
)
Array
(
    [0] => 90324
    [1] => 
)
Array
(
    [0] => 90325
    [1] => 
)
Array
(
    [0] => 90326
    [1] => 
)

我做错了什么？

Answer 1

你检查过$explode的内容了吗？在调用 _paying() 之前尝试 print_r($explode); 以确保有数据。