Referral System — Developer Guide

1

Create invite.php page Referral code, invite link, copy & share UI

<?php include("header.php"); ?> 
<?php include("dbcon.php"); ?>

<?php
// ---------------------------------------------------------
// User er invite code / referral code ber kora
// (apnar users table ebong session onujayi eta customize korben)
// ---------------------------------------------------------

$referCode = $phone;

// Play Store app link
$appLink = "https://play.google.com/store/apps/details?id=com.imantg.payzi";

// Invite link - referral code soho
$inviteLink = $referCode !== ""
    ? $appLink . "&referrer=" . urlencode($referCode)
    : $appLink;
?>

<style>
    .invite-wrapper {
        max-width: 480px;
        margin: 30px auto;
        padding: 25px 20px;
        background: #ffffff;
        border-radius: 16px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        text-align: center;
        font-family: 'Segoe UI', Arial, sans-serif;
    }

    .invite-wrapper h2 {
        color: #222;
        font-size: 22px;
        margin-bottom: 8px;
    }

    .invite-wrapper p.sub {
        color: #666;
        font-size: 14px;
        margin-bottom: 25px;
    }

    .invite-icon {
        width: 80px;
        height: 80px;
        margin: 0 auto 15px;
        background: linear-gradient(135deg, #6a11cb, #2575fc);
        border-radius: 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 36px;
        color: #fff;
    }

    .invite-box {
        display: flex;
        align-items: center;
        border: 1.5px dashed #2575fc;
        border-radius: 10px;
        padding: 12px 14px;
        background: #f5f8ff;
        margin-bottom: 18px;
        gap: 10px;
    }

    .invite-box input {
        flex: 1;
        border: none;
        background: transparent;
        outline: none;
        font-size: 13px;
        color: #333;
        width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .copy-btn {
        border: none;
        background: #2575fc;
        color: #fff;
        padding: 9px 16px;
        border-radius: 8px;
        font-size: 13px;
        font-weight: 600;
        cursor: pointer;
        white-space: nowrap;
        transition: background 0.2s ease;
    }

    .copy-btn:hover {
        background: #1a5edb;
    }

    .copy-btn.copied {
        background: #28a745;
    }

    .refer-code {
        font-size: 13px;
        color: #444;
        margin-bottom: 20px;
    }

    .refer-code span {
        font-weight: 700;
        color: #2575fc;
        letter-spacing: 1px;
    }

    .share-btn {
        display: inline-block;
        width: 100%;
        padding: 12px;
        background: #25d366;
        color: #fff;
        border: none;
        border-radius: 10px;
        font-size: 15px;
        font-weight: 600;
        cursor: pointer;
        text-decoration: none;
    }

    .toast {
        position: fixed;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%) translateY(20px);
        background: #222;
        color: #fff;
        padding: 10px 20px;
        border-radius: 8px;
        font-size: 13px;
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
        z-index: 999;
    }

    .toast.show {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
</style>

<div class="invite-wrapper">
    <div class="invite-icon">🎁</div>
    <h2>Invite &amp; Earn</h2>
    <p class="sub">Apnar friend der invite korun ebong app download korale reward paben</p>

    <?php if ($referCode !== ""): ?>
    <div class="refer-code">
         Referral Code: <span><?php echo htmlspecialchars($referCode); ?></span>
    </div>
    <?php endif; ?>

    <div class="invite-box">
        <input type="text" id="inviteLinkInput" value="<?php echo htmlspecialchars($inviteLink); ?>" readonly>
        <button class="copy-btn" id="copyBtn" onclick="copyInviteLink()">Copy</button>
    </div>

    
</div>

<div class="toast" id="toast">Link copied!</div>

<script>
function copyInviteLink() {
    const input = document.getElementById('inviteLinkInput');
    const btn = document.getElementById('copyBtn');
    const toast = document.getElementById('toast');

    input.select();
    input.setSelectionRange(0, 99999); // mobile support

    if (navigator.clipboard && navigator.clipboard.writeText) {
        navigator.clipboard.writeText(input.value).then(function () {
            showCopied(btn, toast);
        }).catch(function () {
            fallbackCopy(input, btn, toast);
        });
    } else {
        fallbackCopy(input, btn, toast);
    }
}

function fallbackCopy(input, btn, toast) {
    try {
        document.execCommand('copy');
        showCopied(btn, toast);
    } catch (err) {
        alert('Copy failed, please copy manually.');
    }
}

function showCopied(btn, toast) {
    const oldText = btn.textContent;
    btn.textContent = 'Copied!';
    btn.classList.add('copied');
    toast.classList.add('show');

    setTimeout(function () {
        btn.textContent = oldText;
        btn.classList.remove('copied');
        toast.classList.remove('show');
    }, 2000);
}
</script>

<?php include("footer.php"); ?>

2

Create referid, income_status — DB row Run once on the user table

ALTER TABLE `user` ADD `referid` VARCHAR(50) NOT NULL AFTER `date`, ADD `income_status` INT NOT NULL DEFAULT '0' AFTER `referid`;

3

Registration page — insert referid No separate code block yet — wire this into your signup handler

Registration form theke submit howar somoy, referrer-er phone / referid value ta user table e new row create korar shomoy insert korte hobe.

4

Income send page Referrer-ke ekbari reward credit kora

fetch - this from user table
$income_status  = $getdata55['income_status '];
			$referid = $getdata55['referid'];



if($income_status==0){
				

$sql2 = "SELECT * FROM `user` WHERE `phone` = '$referid'";
 $run2 = mysqli_query($con,$sql2);
 $ii = 1; 
$getdata2 = mysqli_fetch_assoc($run2);
 $wallet = $getdata2['wallet']+5; 
 
 mysqli_query($con,"UPDATE `user` SET `wallet`='$wallet' WHERE `phone` = '$referid'");

 mysqli_query($con,"UPDATE `user` SET `refer_income`='1' WHERE `phone` = '$phone'");


				
			}

⚠️ Note: raw $referid / $phone query e directly boshano hocche — production e jaowar age prepared statements diye SQL injection theke bachiye nin.

Referral / Invite System — Setup Steps