This is an easy to use, non-bloated, framework independent, QR Code generator in PHP.
Install through composer:
composer require sujanshresthanet/php-qrcode-generator
Getting started:-
We start off by creating a folder named PHP QRCode Generator. We open this folder in an editor. I am using Atom for it. Having done that, we will create a file named ‘index.html’ which will be storing the Html structure of our web page.
Creating index.html file:-
We give our web page the title “PHP QRCode Generator”. We include css in our project with the following code:-
<link rel="stylesheet" href="css/style.css">
We also include jQuery in our project with the following code:-
<script src="js/jquery-3.6.0.js"></script>
and we include custom jQuery code in our project with the following code:-
<script src="js/custom.js"></script>
We include the QR code library with the following code:-
include('libs/phpqrcode/qrlib.php');
index.php file
<?php
$f = "visit.php";
if(!file_exists($f)){
touch($f);
$handle = fopen($f, "w" ) ;
fwrite($handle,0) ;
fclose ($handle);
}
include('libs/phpqrcode/qrlib.php');
function getUsernameFromEmail($email) {
$find = '@';
$pos = strpos($email, $find);
$username = substr($email, 0, $pos);
return $username;
}
$email = '';
$subject = '';
$body = '';
if(isset($_POST['submit']) ) {
// set error correction level L
$err_correction = 'L';
$pixel_size = 8;
$frame_size = 8;
$tempDir = 'images/';
$errorMessage = '';
$folderPermission = substr(sprintf('%o', fileperms($tempDir)), -4);
if($folderPermission != '777' && $folderPermission != '0777') {
$errorMessage = 'You do not have permissions to generate a file to a directory - '.$tempDir.'. Please change the folder permission to 777.';
} else {
$email = $_POST['mail'];
$subject = $_POST['subject'];
$filename = getUsernameFromEmail($email);
$body = $_POST['msg'];
$codeContents = 'mailto:'.$email.'?subject='.urlencode($subject).'&body='.urlencode($body);
QRcode::png($codeContents, $tempDir.''.$filename.'.png', $err_correction, $pixel_size, $frame_size);
}
}
?>
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
<div>
<form method="POST">
<?php echo $errorMessage; ?>
<fieldset>
<p>Enter your information to generate QRcode</p>
<label for="email">E-mail address</label>
<input type="email" placeholder="you@domain.com" id="email" name="mail" value="<?php echo $email; ?>" required>
<label for="subject">Subject</label>
<input type="text" placeholder="Email Subject" id="subject" name="subject" value="<?php echo $subject; ?>" required>
<label for="message">Message</label>
<textarea name="msg" rows="3" placeholder="Enter your message" id="message"><?php echo $body; ?></textarea>
<input type="submit" name="submit" value="Generate QRcode">
</fieldset>
</form>
</div>
<?php if(isset($filename)): ?>
<div class="qr-image">
<img src="images/<?php echo $filename; ?>.png" style="width:200px; height:200px;">
<a class="btn btn-primary submitBtn" style="width:210px; margin:5px 0;" href="download.php?file=<?php echo $filename; ?>.png "><br>Download QR Code</a>
</div>
<?php endif; ?>
<script type="text/javascript" src="js/custom.js"></script>
</body>
</html>style.css file
input:not([type=submit]), textarea {
display: block;
width: 100%;
margin-bottom: 1rem;
padding: 0.25rem;
font-size: 1rem;
color: black;
border: 0;
outline: 0;
background-color: #e6e6e6;
transition: 0.2s ease-in-out;
transition-property: background-color, box-shadow;
}
input:not([type=submit])::-moz-placeholder, textarea::-moz-placeholder {
color: rgba(22, 22, 22, 0.5);
opacity: 1;
-moz-transition: color 0.2s ease-in-out;
transition: color 0.2s ease-in-out;
}
input:not([type=submit]):-ms-input-placeholder, textarea:-ms-input-placeholder {
color: rgba(22, 22, 22, 0.5);
opacity: 1;
-ms-transition: color 0.2s ease-in-out;
transition: color 0.2s ease-in-out;
}
input:not([type=submit])::placeholder, textarea::placeholder {
color: rgba(22, 22, 22, 0.5);
opacity: 1;
transition: color 0.2s ease-in-out;
}
input:not([type=submit]):focus::-moz-placeholder, textarea:focus::-moz-placeholder {
opacity: 1;
}
input:not([type=submit]):focus:-ms-input-placeholder, textarea:focus:-ms-input-placeholder {
opacity: 1;
}
input:not([type=submit]):focus::placeholder, textarea:focus::placeholder {
opacity: 1;
}
input:not([type=submit]):-moz-placeholder-shown, textarea:-moz-placeholder-shown {
background-color: #808080;
}
input:not([type=submit]):-ms-input-placeholder, textarea:-ms-input-placeholder {
background-color: #808080;
}
input:not([type=submit]):placeholder-shown, textarea:placeholder-shown {
background-color: #fff;
}
input:not([type=submit]):not(:-moz-placeholder-shown), textarea:not(:-moz-placeholder-shown) {
background-color: #e6e6e6;
}
input:not([type=submit]):not(:-ms-input-placeholder), textarea:not(:-ms-input-placeholder) {
background-color: #e6e6e6;
}
input:not([type=submit]):not(:placeholder-shown), textarea:not(:placeholder-shown) {
background-color: #fff;
}
input:not([type=submit]):not(:focus):not(:-moz-placeholder-shown):valid, textarea:not(:focus):not(:-moz-placeholder-shown):valid {
box-shadow: inset 0 0 0 0.125rem #00a34a;
}
input:not([type=submit]):not(:focus):not(:-ms-input-placeholder):valid, textarea:not(:focus):not(:-ms-input-placeholder):valid {
box-shadow: inset 0 0 0 0.125rem #00a34a;
}
input:not([type=submit]):not(:focus):not(:placeholder-shown):valid, textarea:not(:focus):not(:placeholder-shown):valid {
box-shadow: inset 0 0 0 0.125rem #00a34a;
}
input:not([type=submit]):not(:focus):not(:-moz-placeholder-shown):invalid, textarea:not(:focus):not(:-moz-placeholder-shown):invalid {
box-shadow: inset 0 0 0 0.125rem #208484;
}
input:not([type=submit]):not(:focus):not(:-ms-input-placeholder):invalid, textarea:not(:focus):not(:-ms-input-placeholder):invalid {
box-shadow: inset 0 0 0 0.125rem #208484;
}
input:not([type=submit]):not(:focus):not(:placeholder-shown):invalid, textarea:not(:focus):not(:placeholder-shown):invalid {
box-shadow: inset 0 0 0 0.125rem #208484;
}
input:not([type=submit]):-moz-placeholder-shown:invalid:not(:focus), input:not([type=submit]):-moz-placeholder-shown:valid:not(:focus), textarea:-moz-placeholder-shown:invalid:not(:focus), textarea:-moz-placeholder-shown:valid:not(:focus) {
box-shadow: inset 0 0 0 0.125rem #808080;
}
input:not([type=submit]):-ms-input-placeholder:invalid:not(:focus), input:not([type=submit]):-ms-input-placeholder:valid:not(:focus), textarea:-ms-input-placeholder:invalid:not(:focus), textarea:-ms-input-placeholder:valid:not(:focus) {
box-shadow: inset 0 0 0 0.125rem #808080;
}
input:not([type=submit]):placeholder-shown:invalid:not(:focus), input:not([type=submit]):placeholder-shown:valid:not(:focus), input:not([type=submit]):focus, textarea:placeholder-shown:invalid:not(:focus), textarea:placeholder-shown:valid:not(:focus), textarea:focus {
box-shadow: inset 0 0 0 0.125rem #808080;
}
input:not([type=submit]):focus, textarea:focus {
background-color: #fff;
}
form:invalid input[type=submit] {
opacity: 0.5;
cursor: not-allowed;
}
form:valid input[type=submit] {
opacity: 1;
cursor: pointer;
}
* {
box-sizing: border-box;
}
html, body {
height: 100%;
font-size: 16px;
}
body {
display: flex;
align-items: center;
justify-content: center;
font-family: sans-serif;
color: #161616;
background: linear-gradient(to bottom right, white, #808080) fixed;
}
form {
position: relative;
width: 16rem;
margin: 1rem auto;
padding: 1rem;
text-align: center;
border-radius: 0.5rem;
background: #e6e6e6;
box-shadow: 0 0.25rem 1rem rgba(128, 128, 128, 0.25);
overflow: hidden;
}
form::before {
content: "";
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 0.5rem;
background-color: #0e8484;
}
fieldset {
border: none;
color: #808080;
font-size: 0.75rem;
}
label {
display: block;
font-size: 0.75rem;
text-align: left;
letter-spacing: 0.05em;
margin-bottom: 0.25rem;
}
input, textarea {
border-radius: 0.25rem;
}
textarea {
min-height: 2rem;
resize: vertical;
}
input[type=submit] {
display: inline-block;
padding: 0.5rem 1.5rem;
color: #e6e6e6;
font-size: 0.75rem;
text-transform: uppercase;
border: none;
background: linear-gradient(180deg, #0e8484, #0abbe6);
box-shadow: 0 0.0625rem 0.5rem rgba(128, 128, 128, 0.25);
transition: all 0.25s ease-in-out;
}
input[type=submit]:hover {
box-shadow: 0 0.125rem 0.5rem rgba(128, 128, 128, 0.5);
transform: translateY(-0.0625rem);
}
.qr-image {
padding: 10px;
text-align: center;
}
custom.js file:-
var inputs = document.querySelectorAll('input[type=text], input[type=email]');
for (i = 0; i < inputs.length; i++) {
var inputEl = inputs[i];
if (inputEl.value.trim() !== '') {
inputEl.parentNode.classList.add('input--filled');
}
inputEl.addEventListener('focus', onFocus);
inputEl.addEventListener('blur', onBlur);
}
function onFocus(ev) {
ev.target.parentNode.classList.add('inputs--filled');
}
function onBlur(ev) {
if (ev.target.value.trim() === '') {
ev.target.parentNode.classList.remove('inputs--filled');
} else if (ev.target.checkValidity() == false) {
ev.target.parentNode.classList.add('inputs--invalid');
ev.target.addEventListener('input', liveValidation);
} else if (ev.target.checkValidity() == true) {
ev.target.parentNode.classList.remove('inputs--invalid');
ev.target.addEventListener('input', liveValidation);
}
}
function liveValidation(ev) {
if (ev.target.checkValidity() == false) {
ev.target.parentNode.classList.add('inputs--invalid');
} else {
ev.target.parentNode.classList.remove('inputs--invalid');
}
}
var submitBtn = document.querySelector('input[type=submit]');
submitBtn.addEventListener('click', onSubmit);
function onSubmit(ev) {
var inputsWrappers = ev.target.parentNode.querySelectorAll('span');
for (i = 0; i < inputsWrappers.length; i++) {
input = inputsWrappers[i].querySelector('input[type=text], input[type=email]');
if (input.checkValidity() == false) {
inputsWrappers[i].classList.add('inputs--invalid');
} else if (input.checkValidity() == true) {
inputsWrappers[i].classList.remove('inputs--invalid');
}
}
}
