如何遍历表中的行

Question

I have a table named members with 3 rows. The following code attempts to display all the rows in the members table. It displays the 1'st record 3 times instead of displaying each record once.

<?php
$con = new mysqli("localhost", "root", "jce123", "profile");
if (mysqli_connect_errno()) {
    printf("Connection failed: %s\n", mysqli_connect_error());
    exit();
}
    $sql = "SELECT * FROM members";
    $res = mysqli_query($con,$sql);
    $num = mysqli_num_rows($res);
    $array = mysqli_fetch_assoc($res);
    $keysarray = array_keys($array);
    $valuearray = array_values($array);
    for ($i=0; $i < $num; $i++) {
        for($j = 0; $j < count($array); $j++) {
            echo "<table>";
            echo "<tr><td>".$keysarray[$j].": </td><td>".$valuearray[$j]."</td></tr>";
            echo "</table>";
            }
            echo "<br><br>";
        }
    mysqli_close($con);
?>

I've updated this per suggestions:

$sql = "SELECT * FROM members";
    $res = mysqli_query($con,$sql);
    $num = mysqli_num_rows($res);
    $array = mysqli_fetch_assoc($res);
    while ($row = mysqli_fetch_assoc($res)) {
        foreach($array as $key => $value){
            echo "<table>";
            echo "<tr><td>".$key.": </td><td>".$value."</td></tr>";
            echo "</table>";
            }
        echo "<br><br>";
        }

Answer 1

这是因为，您的$ num = 3，count（$ array）= 3，而外部for循环与内部for循环无关。

Answer 2

Any basic tutorial will tell you this. Even the PHP docs provide an example.

Answer 3

Where you have $array = mysqli_fetch_assoc($res); , you will only receive one row from your database. You need something like:

while ($row=mysqli_fetch_assoc($res)) 
{

// processing for each row

}

Answer 4

you can use do something like this..

while ($row=mysqli_fetch_assoc($res)) 
{

    // processing for each row
    e.g
    echo $row['id'];
    echo $row['name'];
    etc
  }

Answer 5

try this... this peace of code is not tested but just to give you an idea...

$sql = "SELECT * FROM members";
    $res = mysqli_query($con,$sql);
    $num = mysqli_num_rows($res);
    while ($row = mysqli_fetch_assoc($res)) {
            echo "<table>";
            echo '<tr><td> id = "'.$row['id'].'": 
                  </td><td> name = "'.$row['name'].'"</td></tr>";
            echo "</table>";
    }