825 MySQL Test

= PHP = The 825 Gen2 includes PHP https://en.wikipedia.org/wiki/PHP which combined with the Apache Web Server allows for powerful web features. From a terminal **php -v** will show the PHP version. {{{ card825gen2:~$ php -v PHP 8.1.10 (cli) (built: Aug 30 2022 16:09:36) (NTS) Copyright (c) The PHP Group Zend Engine v4.1.10, Copyright (c) Zend Technologies }}} Accessing MySQL database from php: Make sure MySQL is configured first. Refer to the [wiki:Docs/825gen2/Dev/Database/MySQL MySQL] page MySQL (MariaDB) Create a simple test php file to read from the database {{{ cd /usr/share/apache2/default-site/htdocs nano readmysql.php }}} {{{#!c++ 825 MySQL Test query($sql); if($result->num_rows > 0) { echo ''; while($row = $result->fetch_assoc()) { $title = $row['title']; $description = $row['description']; echo ''; } echo '

Title	Description
' . $title . '	' . $description . '

'; } } ?> }}} Test with PC on same network as 825. [[Image(825webpagephp.png)]] It may also be helpful to use browser "Developer tools" selection to view the generated html code. [[Image(825webdevtools.png)]] PHP can also be used to read SQLite databases. {{{ card825gen2:/usr/share/apache2/default-site/htdocs$ cat testsqlite.php 825 SQLite Test query('SELECT truck_name,tare FROM trucks'); echo ''; while ($row = $results->fetchArray()) { $truckid = $row['truck_name']; $tare = $row['tare']; echo ''; } echo '

Truck ID	Tare
' . $truckid . '	' . $tare . '

'; ?> }}} [[Image(825webphpsqlite.png)]] Following is a more advanced demo. This reads from an ID storage MySQL transaction table and also displays vehicle images associated with transactions. ids.php {{{ 825 ID Storage query($sql); if($result->num_rows > 0) { echo ''; while($row = $result->fetch_assoc()) { $tkt_num = $row['tkt_num']; $datetime = $row['date'] . ' ' . $row['time']; $veh = $row['truck']; $prod = $row['prod']; $cust = $row['cust']; $job = $row['job']; $gross = $row['gross']; $tare = $row['tare']; $net = $row['net']; echo ''; $imgfile = sprintf("v%06d_1.jpg", $tkt_num); $img = 'images/' . $imgfile; if(file_exists($img)) { echo ''; } else { echo ''; } $imgfile = sprintf("v%06da_1.jpg", $tkt_num); $img = 'images/' . $imgfile; if(file_exists($img)) { echo ''; } else { echo ''; } echo ''; } echo '

Tran Num	date/time	Vehicle Product Customer	Gross Wt	Tare Wt	Net Wt	Image	First pass
' . $tkt_num . '	' . $datetime . '	' . $veh . ' ' . $prod . ' ' . $cust . '	' . $gross . '	' . $tare . '	'. $net . '

'; } } ?> }}} [[Image(825webpage_ids_captured_images.png)]]