/home/edulekha/crm.edulekha.com/application/views/admin/includes/db_update_required.php
<?php defined('BASEPATH') or exit('No direct script access allowed'); ?>
<!DOCTYPE html>
<html lang="en">

<head>
    <link rel="stylesheet" type="text/css" id="roboto-css"
        href="<?= site_url('assets/plugins/roboto/roboto.css'); ?>">
    <style>
        body {
            font-family: Roboto, Geneva, sans-serif;
            font-size: 15px;
        }

        .bold,
        b,
        strong,
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 500;
        }

        .wrapper {
            margin: 0 auto;
            display: block;
            background: #f0f0f0;
            width: 700px;
            border: 1px solid #e4e4e4;
            padding: 20px;
            border-radius: 4px;
            margin-top: 50px;
            text-align: center;
        }

        .wrapper h1 {
            text-align: center;
            font-size: 27px;
            color: red;
            margin-top: 0px;
        }

        .wrapper .upgrade_now {
            text-transform: uppercase;
            background: #82b440;
            color: #fff;
            padding: 15px 25px;
            border-radius: 3px;
            text-decoration: none;
            text-align: center;
            border: 0px;
            outline: 0px;
            cursor: pointer;
            font-size: 15px;
        }

        .wrapper .upgrade_now:hover,
        .wrapper .upgrade_now:active {
            background: #73a92d;
        }

        .wrapper .upgrade_now:disabled {
            cursor: not-allowed;
            pointer-events: none;
            box-shadow: none;
            opacity: .65;
        }

        .upgrade_now_wrapper {
            margin: 0 auto;
            width: 100%;
            text-align: left;
            margin-top: 35px;
        }

        .note {
            color: #636363;
        }
    </style>
</head>

<body>
    <div class="wrapper">
        <h1>Database upgrade is required!</h1>
        <p>You need to perform a database upgrade before proceeding. Your <b>files version is
                <?= wordwrap($this->config->item('migration_version'), 1, '.', true); ?></b>
            and <b>database version is
                <?= wordwrap($this->current_db_version, 1, '.', true); ?>.</b>
        </p>
        <p class="bold">Make sure that you have backup of your database before performing an upgrade.</p>
        <div class="upgrade_now_wrapper">
            <div style="text-align:center">
                <?= form_open($this->config->site_url($this->uri->uri_string()), ['id' => 'upgrade_db_form']); ?>
                <input type="hidden" name="upgrade_database" value="true">
                <button type="submit" id="submit_btn" onclick="upgradeDB(); return false;" class="upgrade_now">Upgrade
                    now</button>
                <?= form_close(); ?>
            </div>
            <br />
            <p style="text-align:center;">
                <small class="note">This message may shown if you uploaded files from newer version downloaded from
                    CodeCanyon to your existing installation or you used auto upgrade tool.</small>
            </p>
            <?php
     if ($copyData = get_last_upgrade_copy_data()) {
         if ($copyData->version == $this->config->item('migration_version')) { ?>
            <hr />
            <h3>A Note of After Upgrade Errors.</h3>
            <p style="line-height:20px;">
                First make sure that you re-check all your custom files, including <b>my_functions_helper.php</b>,
                <b>my_ prefixed files</b>, <b>custom hooks</b>, <b>custom clients area themes</b> and any <b>third party
                    modules</b>.
            </p>
            <p style="line-height:20px;"><b>Sometimes can happen not all files to be extracted while extracting the
                    files from the upgrade</b> .zip (mostly caused by wrong files permissions), the upgrade files are
                copied to <b><?= e($copyData->path); ?></b>,
                you can try to <b>extract them manually</b> for all cases to re-replace the files e.q. via cPanel or
                command line, use the best method that is suitable for you. <br /></p>

            The copied upgrade zip file will be <b> available for the next
                <?= _delete_temporary_files_older_then() / 60; ?>
                minutes</b>.

            <p>
                <b>Remember that</b> that in case you need to extract the files manually, you must extract the contents
                of the
                <b><?= basename($copyData->path); ?></b> file
                in <b><?= FCPATH; ?></b>
            </p>
            <small class="note">You can copy the text above in case you need to extract the files manually so you can
                know the location of the upgrade file.</small>
            <?php
         }
     }
?>
        </div>
    </div>
    <script>
        function upgradeDB() {
            document.getElementById('submit_btn').disabled = true;
            document.getElementById('submit_btn').innerHTML = "Please wait...";
            document.getElementById("upgrade_db_form").submit();
        }
    </script>
</body>

</html>