Useful functions for wordpress #php #wordpress

WordPress_functions_utils.php

<?php

/**
 * Funciones Útiles Wordpress / Useful functions for wordpress
 */

// Print Nav Menu 
// https://developer.wordpress.org/reference/functions/wp_nav_menu/
//---------------------------------------------------------------
wp_nav_menu(array(
  'menu' => 'wp_menu_top',
  'container' => ''
));
//---------------------------------------------------------------


// List All Taxonomies *
// http://codex.wordpress.org/Function_Reference/get_terms
//-------------------------------------------------------
$terms = get_terms('name_taxonomy');
//-------------------------------------------------------


// Get post by taxonomy *
// Taxonomia: marca
// http://codex.wordpress.org/Class_Reference/WP_Query
//-------------------------------------------------------
$args_products = array(
  'post_type' => 'post_name',
  'tax_query' => array(
    array(
      'taxonomy' => 'marca',
      'field' => 'term_id',
      'terms' => 3
    )
  ),
  'posts_per_page' => 5
);

$loop_products = new WP_Query( $args_products );
//-------------------------------------------------------


// Get values of custom boxes "Custom Field" of a taxonomy *
// http://www.advancedcustomfields.com/resources/how-to-get-values-from-a-taxonomy-term/
//-------------------------------------------------------
$variable = get_field( 'field_name', $term );
// Product category with ID 42
$variable = get_field( 'field_name', 'product-cat_42' );
// User with ID 24
$variable = get_field( 'field_name', 'user_24' );
//-------------------------------------------------------


// Print Image *
// http://codex.wordpress.org/Function_Reference/the_post_thumbnail
//-------------------------------------------------------
$default_attr = array(
  'alt' => get_the_title(),
  'title' => get_the_title(),
  'class' => 'product-img',
  'style' => 'width: 131px;'
);
the_post_thumbnail( 'thumbnail-image', $default_attr );
//Print: <img src="../img.png" class="product-img" style="width: 131px;" alt="Alt" title="Title"/>
//-------------------------------------------------------


// Print Image manual
//-------------------------------------------------------
$image_id = 12;
// or with custom field
$image_id = get_field( 'featured_image', get_the_ID() );
$image_attr = array(
  'src' => wp_get_attachment_image_url( $image_id, 'full' ),
  'srcset' => wp_get_attachment_image_srcset( $image_id ),
  'alt' => get_post_meta( $image_id, '_wp_attachment_image_alt', true ),
  'title' => the_title_attribute( [
          'post' => $image_id,
          'echo' => 0,
  ] ),
);
// Print image:
// <img src="<?php echo $image_attr['src'] ?>" srcset="<?php echo $image_attr['srcset'] ?>" alt="<?php echo $image_attr['alt'] ?>" title="<?php echo $image_attr['title'] ?>" />

// Todo: Close the php closing tag. Not closed here because gist
//-------------------------------------------------------


//Obtener SRC de una IMAGEN DESTACADA de un POST
//http://codex.wordpress.org/Function_Reference/wp_get_attachment_image_src
//-------------------------------------------------------
$image = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID) , 'my_thumbail');
//Return:
//[0] => url
//[1] => width
//[2] => height
//[3] => boolean: true if $url is a resized image, false if it is the original.
//-------------------------------------------------------


//Obtener TAXONOMIA de un POST *
//http://codex.wordpress.org/Function_Reference/wp_get_post_terms
//---------------------------------------------------------------
$terms = wp_get_post_terms($post->ID, 'my_taxonomy', array("fields" => "all"));
//---------------------------------------------------------------


//Obtener IMAGEN de ACF(Advanced Custom Field)
//http://www.advancedcustomfields.com/resources/image/
//---------------------------------------------------------------
//Type: Object
$image = get_field('the_field_image');
$thumbnail = $image['sizes']['my_image-thumbnail'];
$title = $brand_logo_image['title'];
$alt = $brand_logo_image['alt'];
/* HTML
<img src="<?php echo $thumbnail; ?>" alt="<?php echo $alt ?>" title="<?php echo $title ?>" />
*/
//---------------------------------------------------------------

//Obtener PARTE de un WEB
//https://codex.wordpress.org/Function_Reference/get_template_part
//---------------------------------------------------------------
get_template_part( 'partials/content', 'page' );
//---------------------------------------------------------------

//Obtener ID de un POST por SLUG
//https://wordpress.org/support/topic/how-can-i-get-the-page-id-from-a-page-slug
//--------------------------------------------------------------- 
$my_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_name = '$slug'"
//---------------------------------------------------------------