PDO update table using array

Question

I\'m learning and new in PDO. The usage of array in PDO causes difficulty for me. I\'m developing simple web application using PDO syntax. Everything is going on smoothly, but I

Answer 1

Use for loop for this operation as there are no associative arrays involved

if(isset($_POST['submit'])){

$name = array();// initialize it first for a good coding standard
$roll = array();// initialize it first for a good coding standard
$name = $_POST['name'];
$roll = $_POST['roll'];

for($i=0;$i<count($name);$i++){ // considering the array elements of roll are equal to name elements 
    $sql = "UPDATE student SET name=:name WHERE roll=:roll";
    $query = $con->prepare($sql);
    $query->bindparam(':roll', $name[$i]);
    $query->bindparam(':name', $roll[$i]);
    $query->execute();
}
}

Answer 2

How about you prepare the statement outside the loop, then bind the values within the loop and execute.

<?php


if(isset($_POST['submit'])){
    $name = $_POST['name'];
    $roll = $_POST['roll'];


     $sql = "UPDATE student SET name=:name WHERE roll=:roll";
     $query = $con->prepare($sql);

    foreach($roll as $key => $n){
        $query->bindParam(':roll', $n[$key]);
        $query->bindParam(':name', $name[$key]);
        $query->execute();
    }
}