从MySQL获取逗号分隔的链接列表-PHP

Question

id      name
1       Abc
2       Bcd
3       Def
4       Efg
5       Xyz

Now i am using mysqli prepared statements to fetch my data

<?php
  if ($stmt1 = $mysqli->prepare("SELECT name FROM TABLE")) {
      $stmt1->execute();
      $res1 = $stmt1->get_result();             
      while($rwv=mysqli_fetch_array($res1)) {
?>

   <a href="page.php?name=<?php echo $rwv['name']; ?>"><?php echo $rwv['name']; ?></a>

<?php } } $stmt1->close(); ?>

Output i get on using above query:

AbcBcddefEfgXyz

Desired Ouput:

Abc, Bcd, Def, Efg, Xyz

I searched on Google and found solutions to use GROUP_CONCAT func. I used GROUP_CONCAT function but then it shows an error on a href that variable "name" is undefined. How i can get the desired output ?? Thanks in advance...

Answer 1

Please check below example, You can use GROUP_CONCAT in mysql.

"SELECT GROUP_CONCAT(CONCAT('<','a href=\"pagename.php?name=', title, '\"\>', title, '<', '/a>')) as name FROM YOUR_TABLE"

The above example fetch the records with comma separated value from mysql with column name name , So you will not get the error as you mentioned above. May be it will help you.

Answer 2

The other answer is just terrible.

We are trying desperately to make PHP users to refrain from intermixing PHP with HTML, but that answer is lowering a problem a level deeper, intermixing HTML with SQL.

While using separation from HTML you can make your code real neat

<?php
    $data = $mysqli->query("SELECT name FROM users")->fetch_all(MYSQLI_ASSOC);
    $last = count($data) - 1;
?>
<? foreach ($data as $i => $row) { ?>
    <a href="page.php?name=<?= $row['name'] ?>"><?= $row['name'] ?></a><!--
    --><?php if ($i != $last) { ?>,<?php } ?>
<?php }  ?>

Answer 3

Another way to go that you can use with your existing code is: (added 3 lines to the code, all with comment //Added this

<?php
  if ($stmt1 = $mysqli->prepare("SELECT name FROM TABLE")) {
      $stmt1->execute();
      $res1 = $stmt1->get_result();
      $hasGonePastFirst = false;  //Added this             
      while($rwv=mysqli_fetch_array($res1)) {

       if($hasGonePastFirst) echo ' , ';   //Added this
       else $hasGonePastFirst = true;      //Added this
?>

   <a href="page.php?name=<?php echo $rwv['name']; ?>"><?php echo $rwv['name']; ?></a>

<?php
 } } $stmt1->close(); ?>