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15-minute interval aggregation

PHP

$midpoint = floor(($minutes+7)/15)*15;

JavaScript

midpoint = Math.floor((minutes+7)/15)*15;

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Screen cheatsheet

Detaching

control + A and then immediately followed by D

Resuming a screen

screen -r

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Default WordPress .htaccess

Hostname installation

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f

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Regex validation with PHP

ISO Date

<?php
preg_match("/^(\d{4})-(\d{2})-(\d{2})$/", "1970-01-01");
?>

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Getting the timezone offsets

The difference between the generated time using:

1. the Default timezone setting; versus
2. the UTC timezone

JavaScript

new Date().getTimezoneOffset();

WordPress

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Creating and managing nonce on Wordpress

Creating a raw nonce value

Action-based

$nonce = wp_create_nonce( 'my-action_'.$post->ID ); // 295a686963

HTML sample

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Adding screen options on Wordpress

functions.php

function register_submenu_screen() {
    global $pagenow;

    if( $pagenow == 'options-general.php' && isset($_GET['page']) && $_GET['page']=='integrations' ) {
        $screen = get_current_screen();
        add_filter( 'screen_layout_columns', 'embed_submenu_screen' );

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Calculating the Easter date with PHP

get_easter_datetime()

function get_easter_datetime($year) {
    $base = new DateTime("$year-03-21");
    $days = easter_days($year);

    return $base->add(new DateInterval("P{$days}D"));
}

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Wordpress AJAX Cheatsheet

Table of contents

1. Adding ajaxurl for the public side (optional)
2. Preparing callable functions
   • Hook for the admin side
   • Hook for the public side (optional)
3. jQuery implementation

• Asynchronous POST

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Wordpress cheatsheet

User management

Getting the current user

echo get_current_user_id(); //1

Getting the data of a user