<?php
declare(strict_types=1);
error_reporting(E_ALL);
// student: name roll city email date_of_birth
function connect_to_database() {
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
if (!($dbh = mysqli_connect('localhost', 'root', '')))
display_failure('Could not connect to the database: ' . mysqli_connect_error($dbh));
mysqli_set_charset($dbh, 'utf8mb4');
if (!mysqli_query($dbh, 'CREATE DATABASE IF NOT EXISTS STUDENTS_DB'))
display_failure('Could not create database: ' . mysqli_error($dbh));
mysqli_select_db($dbh, 'STUDENTS_DB');
if (!mysqli_query($dbh, 'CREATE TABLE IF NOT EXISTS STUDENT (
ROLL INT(20) PRIMARY KEY,
NAME VARCHAR(255),
CITY VARCHAR(255),
EMAIL VARCHAR(255),
DATE_OF_BIRTH DATE
)'))
display_failure('Could not create table: ' . mysqli_error($dbh));
return $dbh;
}
function html_prologue($title) {
?><!doctype html>
<meta charset="utf-8">
<title><?php echo $title; ?></title>
<style>
body { font-family: sans-serif; font-size: 1.3rem; }
h1 { font-size: 2rem; font-weight: 500; }
h2 { font-size: 1.8rem; font-weight: 500; }
form { margin: 2em auto; width: 20em; }
form > * { padding: 0.5em; }
table, tr, th, td { border-collapse: collapse; border: 1px solid black; }
th, td { padding: 5px; }
</style>
<?php
}
function display_search_form() {
html_prologue('Student details');
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>">
<h2>Enter E-mail address to search for the record of a student</h2>
<label>E-mail: <input type="email" name="email"></label>
<input type="submit" value="Search">
</form>
<?php
}
function display_failure($reason) {
html_prologue('Operation failure');
?>
<h2>Operation failed</h2>
<p>Reason: <?php echo $reason; ?></p>
<?php
die();
}
function search_and_show($dbh, $email) {
$stmt = mysqli_prepare($dbh, 'SELECT * FROM STUDENT WHERE EMAIL = ?');
$result = mysqli_query($dbh, );
html_prologue('Students\' details');
?>
<h2>Students' details</h2>
<p><?php echo mysqli_num_rows($result); ?> record(s) found.</p>
<table>
<tr>
<th>Roll No.</th>
<th>Name</th>
<th>E-mail</th>
<th>City</th>
<th>Date of birth</th>
</tr><?php
while ($row = mysqli_fetch_assoc($result)) { ?>
<tr><td>
<?php echo implode('</td><td>', array_map('htmlspecialchars', [
$row['ROLL'], $row['NAME'], $row['EMAIL'], $row['CITY'],
$row['DATE_OF_BIRTH']
])); ?>
</td></tr>
<?php
} ?>
</table>
<?php
}
if (isset($_GET['email']) && !empty($_GET['email'])) {
$dbh = connect_to_database();
search_and_show($dbh, $_GET['email']);
mysqli_close($dbh);
} else {
html_prologue('Search for a student');
display_search_form();
}