如何从我的数据库获取发布数据-多次提取

Question

<?php 
if ($username = $_GET['username']) 
{
   $sql = "SELECT * FROM posts WHERE username='$username'";
   $q = $db->prepare($sql);
   $q->execute();

   while($q->fetch(PDO::FETCH_ASSOC))
   {
      echo "$username<br/>";
   }
}
?>

Hello everybody. I wanna if username for ex Baran just fetch baran's posts. I have these code and I am getting usernames but when I try the get post date from posts table it does not work. What am I suppose to do.

Answer 1

i think its a typo

if ($username = $_GET['username']) {// assingment

change to:

if ($username == $_GET['username']) {//equal

use preparedStatement to avoid sql injection:

<?php 
if ($username == $_GET['username']) {
   $sql = "SELECT * FROM posts WHERE username = :user ";
   $q = $db->prepare($sql);
   $q->bindValue(':user', $username);
   $q->execute();
   while($row = $q->fetch(PDO::FETCH_ASSOC)) {
      echo $row['username'] .'<br/>';
   }
}

Answer 2

Are you looking something similar? change if ($username == $_GET['username']) {

while($row = $q->fetchAll(PDO::FETCH_ASSOC))
 {
  echo $row['username'];
 }

Answer 3

You have to assign the result of $q->fetch to some variable. See fetch() documentation .

In your example you just echo the value used as input.

Answer 4

inside if you should always be using ==

eg:if($i ==1)
{
something here
}
else
{
something else
}