how can i display sql query in php? CLOSED - php

Question

<?php
include 'config.php'; //connect to db
if(isset($_REQUEST["pwd"]) && isset($_REQUEST["name"])) {
$password = $_REQUEST['pwd']; //pass from previous page
$name = $_REQUEST['name']; //pass from previous page
$checkUserPass = mysql_query("SELECT * FROM validPersonnel WHERE Passkey = '$password' and Name = '$name'", $conn); //check if the user exist
if(mysql_num_rows($checkUserPass) == 1) {
$personnelId = mysql_query("SELECT PersonnelID FROM validPersonnel WHERE Passkey = '$password' and Name = '$name'", $conn); //query user id
while($row = mysql_fetch_assoc($personnelId)) {
echo $row['PersonnelD']; // print user id
}
mysql_close($conn);
//echo "<br/><br/>";
//echo "<script>alert('Logged In.')</script>";
//header("Refresh: 1; url=profile/profile.php?id="'.$id.');
//header('Refresh: 1; url=test.php?id=$personnelId');
} else {
echo "<br/><br/>";
echo "<script>alert('Wrong Password.')</script>";
header('Refresh: 1; url=personnelselect.php');
}
}
?>
i cannot echo the $row['PersonnelD'] the page shows blank. i cannot understand where did i go wrong. this page quesion have been solved

Answer 1

Looks like you have mistake in code:
echo $row['PersonnelD'];
shouldn't it be following?
echo $row['PersonnelID'];

Answer 2

check the mysql_fetch_assoc() function may be its parameter is empty so it can't enter the while loop

Answer 3

Try to debug and check the values came in the variables using var_dump() function. Ex: var_dump($row); in while loop.

Answer 4

In both your querys, you have
"SELECT * FROM validPersonnel WHERE Passkey = '$password' and Name = '$name'"
It should be:
"SELECT * FROM validPersonnel WHERE Passkey = '".$password."' and Name = '".$name."';"
PHP doesn't recognize the $var unless you close the quotes. The period adds the $var to the string.