Wordpress Plugin Development tutorial from scratch (Part 17) Wordpress Update/Delete to Database
In this video session i have explained about,
1. Update data of wordpress table in wordpress, 2. Delete data from wordpress table in wordpress
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All we have seen in 2 different ways by using core function as well as by running direct query.
Steps to do Update data of Wordpress table:
#1: wpdb::update( string $table, array $data, array $where, array|string $format = null, array|string $where_format = null )
#2: wpdb::query and wpdb::prepare
Steps to do Delete data from Wordpress table:
#1: wpdb::delete( string $table, array $where, array|string $where_format = null )
#2: wpdb::query and wpdb::prepare
By Step $wpdb::update,
===============
1. wpdb::update( ‘table’, array( ‘column’ = ‘foo’, ‘field’ = ‘bar’ ), array( ‘ID’ = 1 ) )
2. wpdb::update( ‘table’, array( ‘column’ = ‘foo’, ‘field’ = 1337 ), array( ‘ID’ = 1 ), array( ‘%s’, ‘%d’ ), array( ‘%d’ ) )
‘table’: table_name of wordpress database
By Step $wpdb::delete,
===============
1. wpdb::delete( ‘table’, array( ‘ID’ = 1 ) )
2. wpdb::delete( ‘table’, array( ‘ID’ = 1 ), array( ‘%d’ ) )
‘table’: table_name of wordpress database
By Step $wpdb::query,
=================
We have to use $wpdb::prepare to make Safe Execution of MySql Query
$wpdb-query(
$wpdb-prepare(
"Update wp_custom_plugin set email = '%s' where id = %d",'[email protected]',4
)
);
$wpdb-query(
$wpdb-prepare(
"Delete from wp_custom_plugin where id = %d",4
)
);
An array of formats to be mapped to each of the value in $data. If string, that format will be used for all of the values in $data. A format is one of '%d', '%f', '%s' (integer, float, string).
Documenation Study Notes:
===============
https://developer.wordpress.org/refer...
https://developer.wordpress.org/refer...
https://developer.wordpress.org/refer...
Create database table dynamically by Wordpress Plugin,
===============
Click here to watch: • Wordpress Plugin Development tutorial...
How we add custom javascript code to wordpress plugin page:
==============================
Click here to watch: • Wordpress Plugin Development tutorial...
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RECOMMENDATION:
===============
1. Some knowledge of PHP, HTML for this video series
2. How to Install Wordpress: • Wordpress Theme Development tutorial ...
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
Keep learning and Sharing :)
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