问题：
我正在使用 for each 循环从文本区域中检索行。但我不能在我的 while 循环中使用它们。while 循环只运行一次。我希望它针对文本区域中的所有行运行。但它只显示最后一个 B000 编号（B000575825）的描述。
如何解决这个问题......？
我的代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
</head>
<body>
<form method="post" action="Select_description.php">
<textarea class="form-control" name="text" rows="25" style="width: 150px;">
</textarea>
<br>
<button type="submit" class="btn btn-primary">Data submit</button>
</form>
</body>
</html>
$text = $_POST['text'];
$a = 0;
$b = 0;
foreach(explode("\n", $text) as $b000_number) {
$a++;
$query1 = "SELECT `description` FROM mat_index_items WHERE b000_number = '$b000_number'";
$result1 = mysqli_query($conn, $query1);
while ($row = mysqli_fetch_assoc($result1)) {
$b++;
$description= $row['description'];
echo $description;
echo "<br>";
}
}
echo "Foreach: ".$a;
echo "<br>";
echo "While: ".$b;
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