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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