Answered: This is a PHP code that generates a…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Related questions

Question

This is a PHP code that generates a random number. It's supposed to check if my database already has that number generated. If it does, it generates another number. Else it stops. I am having difficulty figuring the errors out.

<?php

$CRN = rand(1000000, 9999999);

$result = $pdo->query('SELECT * FROM class');

while($row = $result->fetch(PDO::FETCH_ASSOC))

{

if($row["CRN"] == $CRN)

{

generate($pdo);

}

else echo $row["CRN"];

function generate($pdo)

{

$CRN = rand(1000000, 9999999);

determine($pdo, $CRN);

}

function determine($pdo, $CRN)

{

$result = $pdo->query('SELECT *, count(CRN) FROM class WHERE CRN = '.$CRN);

while($row = $result->fetch(PDO::FETCH_ASSOC))

{

if($CRN != $row["CRN"])

{

echo $CRN;

}

else generate($pdo, $CRN);

}

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-engineering and related others by exploring similar questions and additional content below.

Recommended textbooks for you

Computer Networking: A Top-Down Approach (7th Edi…

Computer Engineering

ISBN:

9780133594140

Author:

James Kurose, Keith Ross

Publisher:

PEARSON