error while executing mysqli fetch

Question

I've a php, which displays rows from a MySQL DB, sql query is like this

$cat = 'Available'
$sql = "SELECT title, location, date, matter, userName, emailId, phone FROM ad_usr WHERE type =".$cat;

query works fine in mysql.

but when try to execute following codes

$result = mysqli_query($link, $sql);
$row = mysqli_fetch_assoc($result);

gives an error like this

"mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, boolean given"

but when I use $cat serialNo instead of type and $cat as an integer then it works fine

Answer 1

You have missed to close the "

 $sql = "SELECT title, location, date, matter, userName, emailId, phone FROM ad_usr WHERE type ='$cat'";

You can able to find these errors yourself, if you use editor like eclipse and etc

Answer 2

change to

$cat = "Available";
$sql = "SELECT title, location, date, matter, userName, emailId, phone FROM ad_usr WHERE type ='$cat'"

Answer 3

You don't need to guess. The Quick Start Guide has several usage examples. Please have a look at Executing statements ; most examples listed there show how to do error checking.