Wordpress Plugin Development tutorial from scratch (Part 8) Make Database Table on Plugin Activation

Published: 15 November 2017
on channel: Online Web Tutor

15,521

126

In this video session i have explained about creating database table while plugin activation,

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Steps to do this task:
#1: Create Sql Query First
#2: Embed generated code to function
#3: Bind with action hook

First we need Sql Query to create table,
===============
CREATE TABLE `wp_custom_plugin` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(150) DEFAULT NULL,
`email` varchar(150) DEFAULT NULL,
`phone` varchar(150) DEFAULT NULL,
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1

Then we have to make a seperate function to run when plugin activates,
// table generating code
function custom_plugin_tables(){
global $wpdb;
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');

if (count($wpdb-get_var('SHOW TABLES LIKE "wp_custom_plugin"')) == 0){

$sql_query_to_create_table = "CREATE TABLE `wp_custom_plugin` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(150) DEFAULT NULL,
`email` varchar(150) DEFAULT NULL,
`phone` varchar(150) DEFAULT NULL,
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1"; /// sql query to create table

dbDelta($sql_query_to_create_table);

}
}

and Finally we have to attach with Action hook,
register_activation_hook(__FILE__,'custom_plugin_tables');

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RECOMMENDATION:
===============
1. Some knowledge of PHP, HTML for this video series
2. How to Install Wordpress:    • Wordpress Theme Development tutorial ...
3. register_activation_hook: https://developer.wordpress.org/refer...

Also you can learn Wordpress Custom
===============
Theme Development:    • Wordpress Theme Development tutorial ...
Widget Development:    • Wordpress Widget Development tutorial...

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===============
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Thanks
Online Web Tutor
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