Search Bar Issues MYSQLi

Question

Hi, Just wondering if someone can have a look at what im doing wrong here?
PS All connections to the database work.
I get these three error messages:
Warning: mysqli_query(): Empty query in /home4/X/public_html/props_inventory.php on line 12
Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, boolean given in /home4/X/public_html/props_inventory.php on line 13
Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, boolean given in /home4/X/public_html/props_inventory.php on line 363
<?php
//Main Connection & Query
//Database Connection & Error
$con_host = 'X';
$con_username = 'X';
$con_password = 'X';
$con_database = 'X';
$con = mysqli_connect($con_host, $con_username, $con_password, $con_database);
//Main Query (on page load [Shows all records])
$sql = mysqli_query($con, $sql_search);
$row = mysqli_fetch_assoc($sql);
//Set production info variables
$prop_id = $row['id'];
$prop_title = $row['title'];
$prop_description = $row['description'];
$prop_colour = $row['colour'];
$prop_type = $row['type'];
$prop_size = $row['size'];
$prop_weight = $row['weight'];
$prop_material = $row['material'];
$prop_value = $row['value'];
$prop_location = $row['location'];
$prop_sublocation = $row['sublocation'];
$prop_quantity = $row['quantity'];
$prop_bc = $row['BC'];
$prop_datecreated = $row['datecreated'];
?>
<?php
//Search Bar
if($_POST['txt_search']) {
$search = $_POST['txt_search'];
elseif($_GET['searchprops']) {
$search = $_GET['searchprops'];
if (isset($search))
  $searchword = $search;
  $query_props = "SELECT * FROM props WHERE id LIKE '%".$searchword."%' OR name LIKE '%".$searchword."%' OR description LIKE '%".$searchword."%' OR colour LIKE '%".$searchword."%' OR type LIKE '%".$searchword."%' OR size LIKE '%".$searchword."%' OR weight LIKE '%".$searchword."%' OR value LIKE '%".$searchword."%' OR location LIKE '%".$searchword."%' OR sublocation LIKE '%".$searchword."%' OR BC LIKE '%".$searchword."%'";
if(!isset($search)){
  $query_props = "SELECT * FROM props";
$query_limit_props = sprintf("%s LIMIT %d, %d", $query_props, $startRow_props, $maxRows_props);
$props = mysqli_query($con, $query_limit_props) or die(mysql_error());
$row_props = mysqli_fetch_assoc($props);
?>

Answer 1

You have a lot of problems with your script below. First of all, you are using isset() incorrectly. The isset() function only tests if the field is set, not if it is empty. So even if the user doesn't enter anything, if the field is on the form it is set.
Next, why are you copying the value of one variable into another variable - $searchword = $search; ? What does that accomplish?
Finally, the argument you are passing to mysqli_num_rows() is a single row. You need to pass it the result set.
Fixed the main search bar issue, but still having problem with the num_row statement
Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, array given in /home4/mresnik/public_html/props_inventory.phpon line 47
<?php
//Search
if(isset($_POST['txt_search'])) {
  $search = $_POST['txt_search'];
  $searchword = $search;
  $query_search = "SELECT * FROM props WHERE id LIKE '%".$searchword."%' OR name LIKE '%".$searchword."%' OR description LIKE '%".$searchword."%' OR colour LIKE '%".$searchword."%' OR type LIKE '%".$searchword."%' OR size LIKE '%".$searchword."%' OR weight LIKE '%".$searchword."%' OR value LIKE '%".$searchword."%' OR location LIKE '%".$searchword."%' OR sublocation LIKE '%".$searchword."%' OR BC LIKE '%".$searchword."%'";
if(!isset($search)){
  $query_search = "SELECT * FROM props";
$search_query = mysqli_query($con, $query_search);
$row = mysqli_fetch_assoc($search_query);
$row_count = mysqli_num_rows($row);
?>