how to insert multiple row data into multiple row in php mysql - php

Question

I have retrieved data from the table and all the retrieved data to be stored in another table in each row. I have tried the below code but it is inserting only "
$roll_no = $_POST['roll_no'];
$name = $_POST['name'];
$class = $_POST['class'];
$section = $_POST['section'];
$m_am = $_POST['m_am'];
$a_pm = $_POST['a_pm'];
$date = $_POST['date'];
echo $a_pm .'<br>'.$m_am.'<br>'.$roll_no;
/*$sql_2 = mysql_query("INSERT INTO stud_class_attendance (`sca_rollno`, `sca_name`, `sca_class`, `sca_section`,`sca_am`, `sca_pm`,
?>"

Answer 1

Use mysqli instead of mysql to prevent hacking
and also validate the user input use htmlentities() or htmlspecialchars()
<?php
$roll_no = htmlspecialchars($_POST['roll_no']);
$name = htmlspecialchars($_POST['name']);
$class = htmlspecialchars($_POST['class']);
$section = htmlspecialchars($_POST['section']);
$m_am = htmlspecialchars($_POST['m_am']);
$a_pm = htmlspecialchars($_POST['a_pm']);
$date = htmlspecialchars($_POST['date']);
echo $a_pm .'<br>'.$m_am.'<br>'.$roll_no;
$sql_2 = mysqli_query("INSERT INTO stud_class_attendance (`sca_rollno`, `sca_name`, `sca_class`, `sca_section`,`sca_am`, `sca_pm`, `date`)
values ('$roll_no','$name','$class','$section','$m_am','$a_pm','$date');
$sql_2->execute();
?>

Answer 2

You need a loop for that..
Execute your first query. get all the records from the first query. iterate them and insert one by one in database
See the example
$select = mysql_query("SELECT
name,rollno,class,section,a_am,a_pm,`date`
FROM `student`");
// check if event 1 row exists in database
if(mysql_num_rows($select) > 0 ){
// while loop to iterate every row one by one
$count =0;
while ($row = mysql_fetch_assoc($select)) {
$insert = mysql_query("INSERT INTO `stud_class_attendance`
(`sca_rollno`, `sca_name`, `sca_class`, `sca_section`,`sca_am`, `sca_pm`)
VALUES
('".$row['rollno']."','".$row['name']."','".$row['class']."',
'".$row['section']."','".$row['a_am']."','".$row['a_pm']."')");
// check if the query was executed
if(mysql_insert_id() > 0){
$count++;
}
}
}
echo $count." rows inserted";

Answer 3

$sql='
INSERT INTO `stud_class_attendance` (
`sca_rollno`, `sca_name`,`sca_class`, `sca_section`,`sca_am`, `sca_pm`
)
SELECT rollno,name,class,section,a_am,a_pm FROM `student`
';
$sql2=mysqli_query($sql);
$sql2->execute();