Problems with mysqli_query function [duplicate] - php

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What to do with mysqli problems? Errors like mysqli_fetch_array(): Argument #1 must be of type mysqli_result and such
(2 answers)
Closed 7 years ago.
i'm new to PHP and MySQL. I'm having issues with one of my mysqli_query functions. I have a database connection that works perfectly as the first half of my php file actually stores data into certain tables of the database.
The problem starts when i want to perform another query against the database. Here's the code:
// INSERT statements.
$queryMember = "INSERT INTO member (surname, name, gender, email, telHome, telMobile, dob, studentNum, idNum) VALUES ('$sur_name', '$f_name', '$gender', '$email', '$tel_home', '$mobile_num', ,'$date_of_birth', '$studentNumber', '$id_number')";
$queryAddress = "INSERT INTO physicalDetails (houseNum, unitNum, streetAdd, suburb, city, province, code ) VALUES ('$house_number', '$unit_number', '$street_address', '$suburb_name', '$city_name', '$province_name', '$zip_code')";
$queryStaff = "INSERT INTO staff (staffID ) VALUES ('$staff_id')";
$queryStudent = "INSERT INTO student (major ) VALUES ('$student_major')";
// Statements that must query the database.
$resultMember = mysqli_query($dbc, $queryMember) or die ('Error while inserting data into member details table');
$resultAddress = mysqli_query($dbc, $queryAddress ) or die ('Error while inserting data into member physical details table');
$resultStaff = mysqli_query($dbc, $queryStaff ) or die ('Error while inserting data into staff information table' );
$resultStudent = mysqli_query($dbc, $queryStudent ) or die ('Error while inserting data into student major details table');
mysqli_close($dbc);
When i run my form, my first error is the following: "Error while inserting data into member details table".
I don't understand why it's giving me an error. Any advice or suggestions would be appreciated. :)

Answer 1

Don't output a fixed (and useless) error message: Have the DB tell you what you did wrong:
$resultMember = mysqli_query($dbc, $queryMember) or die (mysqli_error($dbc));
^^^^^^^^^^^^
If you had that, you'd have been told about your syntax errors:
$queryMember = "[..snip..], '$mobile_num', ,'$date_of_birth', '$studentNumber', '$id_number')";
^^^^