From 7451edff7692e86c5238ff7bc6659825e242a84e Mon Sep 17 00:00:00 2001
From: Sudipto Mallick <>
Date: Tue, 2 Jan 2024 03:38:10 +0000
Subject: Quick backup, need to be rewritten

---
 mysql-php/code/a3.php | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 mysql-php/code/a3.php

(limited to 'mysql-php/code/a3.php')
diff --git a/mysql-php/code/a3.php b/mysql-php/code/a3.php
new file mode 100644
index 0000000..f029dd8
--- /dev/null
+++ b/mysql-php/code/a3.php
@@ -0,0 +1,95 @@
+<?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();
+}
-- 
cgit 1.4.1-2-gfad0

