PHP and MySQL: Inserting selects wrong $row - php

Question

I am needing help with my small script.
You see, when I press $_POST['accept_req'] it doesn't select the $req_user I want ($row['username']). It either selects the row above or the row below it, I have no idea what to do.
$requests = mysql_query("SELECT * FROM `party_requests` WHERE party_id = '$get_party_id'");
while ($row = mysql_fetch_array($requests, MYSQL_ASSOC)){
$req_user = mysql_real_escape_string($row['username']);
if(isset($_POST['accept_req'])){
$query = mysql_query("INSERT INTO party_members (`party_id`, `username`) VALUES ('".$get_party_id."', '".$req_user."')") or die("Could not be completed.");
$result = mysql_query($query);
mysql_query("DELETE FROM party_requests WHERE party_id = '$get_party_id' AND username = '$req_user' ");
header("Location: ". $_SERVER['REQUEST_URI']);
exit;
}
echo "<p>", $req_user, "<form action='' method='post'>", "<input type='submit' name='accept_req' value='Accept'/>", "</form>" ,"</p>";
}
I am aware that mysql_* is deprecated, please ignore that.

Answer 1

You can do it this way.
$requests = mysql_query("SELECT * FROM `party_requests` WHERE party_id = '$get_party_id'");
while ($row = mysql_fetch_array($requests, MYSQL_ASSOC))
{
$req_user =$row['username'];
}
if(isset($_POST['accept_req']) and isset($req_user))
{
$query = mysql_query("INSERT INTO party_members (`party_id`, `username`) VALUES ('".$get_party_id."', '".$req_user."')") or die("Could not be completed.");
$result = mysql_query($query);
mysql_query("DELETE FROM party_requests WHERE party_id = '$get_party_id' AND username = '$req_user' ");
header("Location: ". $_SERVER['REQUEST_URI']);
exit;
}
echo "<p>", $req_user, "<form action='' method='post'>", "<input type='submit' name='accept_req' value='Accept'/>", "</form>" ,"</p>";
or this way :
if(isset($_POST['accept_req']))
{
$requests = mysql_query("SELECT * FROM `party_requests` WHERE party_id = '$get_party_id'");
while ($row = mysql_fetch_array($requests, MYSQL_ASSOC))
{
$req_user =$row['username'];
}
$query = mysql_query("INSERT INTO party_members (`party_id`, `username`) VALUES ('".$get_party_id."', '".$req_user."')") or die("Could not be completed.");
$result = mysql_query($query);
mysql_query("DELETE FROM party_requests WHERE party_id = '$get_party_id' AND username = '$req_user' ");
header("Location: ". $_SERVER['REQUEST_URI']);
exit;
}
if(mysql_num_rows($requests)){ //If there isn't any results it outputs "No requests"
echo "<p>", $req_user, "<form action='' method='post'>", "<input type='submit' name='accept_req' value='Accept'/>", "</form>" ,"</p>";
}else{
echo "No requests";
}

Answer 2

The select statement is outside the
if(isset($_POST['accept_req'])){...}
so the code is retrieving the wrong id. You need to put it inside the if statement if i'm understanding what you are trying to do