Metabox For Select Taxonomy Term - mdhemalakhand1999/WordPressPluginDevelopment GitHub Wiki

<?php
/*
Plugin Name: Post And Taxonomy Selector
Plugin URI:
Description:
Version: 1.0
Author: LWHH
Author URI: https://hasin.me
License: GPLv2 or later
Text Domain: post-tax-metafield
Domain Path: /languages/
*/

function ptmf_init() {
	add_action( 'admin_enqueue_scripts', 'ptmf_admin_assets' );
}

add_action( 'admin_init', 'ptmf_init' );

function ptmf_load_textdomain() {
	load_plugin_textdomain( 'post-tax-metafield', false, dirname( __FILE__ ) . "/languages" );
}

add_action( 'plugins_loaded', 'ptmf_load_textdomain' );

function ptmf_admin_assets() {
	wp_enqueue_style( 'ptmf-admin-style', plugin_dir_url( __FILE__ ) . "assets/admin/css/style.css", null, time() );
}

function ptmf_add_metabox() {
	add_meta_box(
		'ptmf_select_posts_mb',
		__( 'Select Posts', 'our-metabox' ),
		'ptmf_display_metabox',
		array( 'page' )
	);
}

add_action( 'admin_menu', 'ptmf_add_metabox' );

function ptmf_save_metabox( $post_id ) {
	if ( ! ptmf_is_secured( 'ptmf_posts_nonce', 'ptmf_posts', $post_id ) ) {
		return $post_id;
	}

	$selected_post_id = $_POST['ptmf_posts'];
	$selected_term_id = $_POST['ptmf_term'];
	if ( $selected_post_id > 0 ) {
		update_post_meta( $post_id, 'ptmf_selected_posts', $selected_post_id );
	}

	if ( $selected_term_id > 0 ) {
		update_post_meta( $post_id, 'ptmf_selected_term', $selected_term_id );
	}
	return $post_id;
}

add_action( 'save_post', 'ptmf_save_metabox' );

function ptmf_display_metabox($post) {

	$selected_post_id = get_post_meta($post->ID,'ptmf_selected_posts',true);
	$selected_term_id = get_post_meta($post->ID,'ptmf_selected_term',true);

	wp_nonce_field( 'ptmf_posts', 'ptmf_posts_nonce' );

	$args = array(
		'post_type'      => 'post',
		'posts_per_page' => - 1
	);

	$dropdown_list = '';
	$_posts        = new wp_query( $args );
	while ( $_posts->have_posts() ) {
		$extra = '';
		$_posts->the_post();
		if(in_array(get_the_ID(),$selected_post_id)){
			$extra = 'selected';
		}
		$dropdown_list .= sprintf( "<option %s value='%s'>%s</option>", $extra, get_the_ID(), get_the_title() );
	}
	wp_reset_query();

    $_terms = get_terms(array(
    	'taxonomy'=>'genre',
	    'hide_empty' => false,
    ));

	$term_dropdown_list = '';
    foreach($_terms as $_term){
	    $extra = '';
	    if($_term->term_id == $selected_term_id){
		    $extra = 'selected';
	    }
	    $term_dropdown_list .= sprintf( "<option %s value='%s'>%s</option>", $extra, $_term->term_id, $_term->name );
    }


	$label        = __( 'Select Posts', 'post-tax-metafield' );
	$label2        = __( 'Select Term', 'post-tax-metafield' );
	$metabox_html = <<<EOD
<div class="fields">
	<div class="field_c">
		<div class="label_c">
			<label>{$label}</label>
		</div>
		<div class="input_c">
			<select multiple="multiple" name="ptmf_posts[]" id="ptmf_posts">
				<option value="0">{$label}</option>
				{$dropdown_list}
			</select>
		</div>
		<div class="float_c"></div>
	</div>
	
	<div class="field_c">
		<div class="label_c">
			<label for="ptmf_term">{$label2}</label>
		</div>
		<div class="input_c">
			<select  name="ptmf_term" id="ptmf_term">
				<option value="0">{$label2}</option>
				{$term_dropdown_list}
			</select>
		</div>
		<div class="float_c"></div>
	</div>
	
</div>
EOD;

	echo $metabox_html;
}

if ( ! function_exists( 'ptmf_is_secured' ) ) {
	function ptmf_is_secured( $nonce_field, $action, $post_id ) {
		$nonce = isset( $_POST[ $nonce_field ] ) ? $_POST[ $nonce_field ] : '';

		if ( $nonce == '' ) {
			return false;
		}
		if ( ! wp_verify_nonce( $nonce, $action ) ) {
			return false;
		}

		if ( ! current_user_can( 'edit_post', $post_id ) ) {
			return false;
		}

		if ( wp_is_post_autosave( $post_id ) ) {
			return false;
		}

		if ( wp_is_post_revision( $post_id ) ) {
			return false;
		}

		return true;

	}
}