Error trying to run a multiqyery - php

Question

Sorry if its a little mistake. i was using first time multi query. error 1 and error 2 both codes are same except single colon('') added in error 2 insert row. if i echo from inside the the for loop shows everything fine. some time success but not inserted in data base. Thank You in advance.
Error 1: Error :You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to
use near 'INSERT INTO student_attendance (attendance_date,
attendance_class_id, attendance' at line 1
include("../includes/db.php");
if(!empty($_POST)) {
$student_attendance_id = $_POST['student_attendance_id'];
$attendance_date = $_POST['attendance_date'];
$attendance_class_id = $_POST['attendance_class_id'];
$attendance_section_id = $_POST['attendance_section_id'];
$attendance_student_id = $_POST['attendance_student_id'];
if(isset($_POST['attendance_present_absent'])){
$attendance_present_absent = $_POST['attendance_present_absent'];
} else {
$attendance_present_absent = '';
}
$query = '';
for($count = 0; $count<count($attendance_student_id); $count++)
{
$attendance_date_now = mysqli_real_escape_string($connection, $attendance_date);
$student_attendance_id_now = mysqli_real_escape_string($connection, $student_attendance_id[$count]);
$attendance_class_id_now = mysqli_real_escape_string($connection, $attendance_class_id[$count]);
$attendance_section_id_now = mysqli_real_escape_string($connection, $attendance_section_id[$count]);
$attendance_student_id_now = mysqli_real_escape_string($connection, $attendance_student_id[$count]);
$attendance_present_absent_now = mysqli_real_escape_string($connection, $attendance_present_absent[$count]);
$query .= "INSERT INTO student_attendance (attendance_date, attendance_class_id, attendance_section_id, attendance_student_id, attendance_present_absent ) ";
$query .= "VALUES ('{$attendance_date_now}', '{$attendance_class_id_now}', '{$attendance_section_id_now}', '{$attendance_student_id_now}', '{$attendance_present_absent_now}' ) ";
echo $attendance_date_now;
echo $attendance_class_id_now . $attendance_section_id_now . "<br>";
}
$result = mysqli_multi_query($connection, $query) or die("Error :" . mysqli_error($connection));
Error 2:You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near ''attendance_date', 'attendance_class_id',
'attendance_section_id', 'attendance_s' at line 1
include("../includes/db.php");
if(!empty($_POST)) {
$student_attendance_id = $_POST['student_attendance_id'];
$attendance_date = $_POST['attendance_date'];
$attendance_class_id = $_POST['attendance_class_id'];
$attendance_section_id = $_POST['attendance_section_id'];
$attendance_student_id = $_POST['attendance_student_id'];
if(isset($_POST['attendance_present_absent'])){
$attendance_present_absent = $_POST['attendance_present_absent'];
} else {
$attendance_present_absent = '';
}
for($count = 0; $count<count($attendance_student_id); $count++)
{
$attendance_date_now = mysqli_real_escape_string($connection, $attendance_date);
$student_attendance_id_now = mysqli_real_escape_string($connection, $student_attendance_id[$count]);
$attendance_class_id_now = mysqli_real_escape_string($connection, $attendance_class_id[$count]);
$attendance_section_id_now = mysqli_real_escape_string($connection, $attendance_section_id[$count]);
$attendance_student_id_now = mysqli_real_escape_string($connection, $attendance_student_id[$count]);
$attendance_present_absent_now = mysqli_real_escape_string($connection, $attendance_present_absent[$count]);
$query .= "INSERT INTO student_attendance ('attendance_date', 'attendance_class_id', 'attendance_section_id', 'attendance_student_id', 'attendance_present_absent' ) ";
$query .= "VALUES ('{$attendance_date_now}', '{$attendance_class_id_now}', '{$attendance_section_id_now}', '{$attendance_student_id_now}', '{$attendance_present_absent_now}' ) ";
echo $attendance_date_now;
echo $attendance_class_id_now . $attendance_section_id_now . "<br>";
}
$result = mysqli_multi_query($connection, $query) or die("Error :" . mysqli_error($connection));

Answer 1

There are two mistakes. First is, in your for cycle you have to add ; after each INSERT string. Second, if you wanna use multiple insert, you should write INSERT part string before for cycle and then just add rows with values, there is , separator used.
include("../includes/db.php");
if(!empty($_POST)) {
$student_attendance_id = $_POST['student_attendance_id'];
$attendance_date = $_POST['attendance_date'];
$attendance_class_id = $_POST['attendance_class_id'];
$attendance_section_id = $_POST['attendance_section_id'];
$attendance_student_id = $_POST['attendance_student_id'];
if(isset($_POST['attendance_present_absent'])){
$attendance_present_absent = $_POST['attendance_present_absent'];
} else {
$attendance_present_absent = '';
}
$query = '';
for($count = 0; $count<count($attendance_student_id); $count++)
{
$attendance_date_now = mysqli_real_escape_string($connection, $attendance_date);
$student_attendance_id_now = mysqli_real_escape_string($connection, $student_attendance_id[$count]);
$attendance_class_id_now = mysqli_real_escape_string($connection, $attendance_class_id[$count]);
$attendance_section_id_now = mysqli_real_escape_string($connection, $attendance_section_id[$count]);
$attendance_student_id_now = mysqli_real_escape_string($connection, $attendance_student_id[$count]);
$attendance_present_absent_now = mysqli_real_escape_string($connection, $attendance_present_absent[$count]);
$query .= "INSERT INTO student_attendance (attendance_date, attendance_class_id, attendance_section_id, attendance_student_id, attendance_present_absent ) ";
$query .= "VALUES ('{$attendance_date_now}', '{$attendance_class_id_now}', '{$attendance_section_id_now}', '{$attendance_student_id_now}', '{$attendance_present_absent_now}' ); ";
echo $attendance_date_now;
echo $attendance_class_id_now . $attendance_section_id_now . "<br>";
}
$result = mysqli_multi_query($connection, $query) or die("Error :" . mysqli_error($connection));
OR
include("../includes/db.php");
if(!empty($_POST)) {
$student_attendance_id = $_POST['student_attendance_id'];
$attendance_date = $_POST['attendance_date'];
$attendance_class_id = $_POST['attendance_class_id'];
$attendance_section_id = $_POST['attendance_section_id'];
$attendance_student_id = $_POST['attendance_student_id'];
if(isset($_POST['attendance_present_absent'])){
$attendance_present_absent = $_POST['attendance_present_absent'];
} else {
$attendance_present_absent = '';
}
$query = 'INSERT INTO student_attendance (attendance_date, attendance_class_id, attendance_section_id, attendance_student_id, attendance_present_absent ) VALUES ';
for($count = 0; $count<count($attendance_student_id); $count++)
{
$attendance_date_now = mysqli_real_escape_string($connection, $attendance_date);
$student_attendance_id_now = mysqli_real_escape_string($connection, $student_attendance_id[$count]);
$attendance_class_id_now = mysqli_real_escape_string($connection, $attendance_class_id[$count]);
$attendance_section_id_now = mysqli_real_escape_string($connection, $attendance_section_id[$count]);
$attendance_student_id_now = mysqli_real_escape_string($connection, $attendance_student_id[$count]);
$attendance_present_absent_now = mysqli_real_escape_string($connection, $attendance_present_absent[$count]);
$query .= ($count>0?",":"") . "('{$attendance_date_now}', '{$attendance_class_id_now}', '{$attendance_section_id_now}', '{$attendance_student_id_now}', '{$attendance_present_absent_now}' )";
echo $attendance_date_now;
echo $attendance_class_id_now . $attendance_section_id_now . "<br>";
}
$query .= ";"
$result = mysqli_multi_query($connection, $query) or die("Error :" . mysqli_error($connection));