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Can I use a two word keyword? Like "reproductive rights" or "socialist feminist"?

this script is supposed to let me search by multiple keywords, but only lets me search by one at a time. The error i get when i try to type in several keywords is: Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in C:wampwwwsearch.php on line 32 <h1>search engine</h1> <form action="search.php" method="get"> <input type="text" name="k" size='50' /> <input type="submit" name="submit" value='Search' /> </form> <hr /> <?php include "connect.php"; $k = $_GET['k']; $terms = explode(" ", $k); $query = "SELECT * FROM search WHERE "; foreach($terms as $each) { $i = 0; $i++; if($i == 1) { $query .= "keywords LIKE '%$each%' "; } else { $query .= "OR keywords LIKE '%$each%' "; } } $result = mysqli_query($con, $query); $numrows = mysqli_num_rows($result); if($numrows > 0) { while($row = mysqli_fetch_array($result)) { $id = $row['id']; $title = $row['title']; $description = $row['description']; $keywords = $row['keywords']; $link = $row['link']; if($k == "") { echo ""; } else { echo "<h2><a href='$link'>$title</a></h2> $description"; } } } else { echo "no result on $k"; }