WPLMS theme Add language in advanced search file

wplms-language-filter.php

<?php
 
/**
* Add language filter
*/ 

// Add languages to theme options
add_filter('vibe_option_custom_sections','wpisle_add_language_option');

function wpisle_add_language_option($sections) {
	 
	$sections[] = array(
				'icon' => 'desktop',
				'title' => __('Course Languages', 'vibe'),
				'desc' => '<p class="description">'.__('Languages for course','vibe').'..</p>',
				'fields' => array(

					array(
						'id' => 'lmslanguages',
						'type' => 'textarea',
						'title' => __('Languages', 'vibe'),
	                        'sub_desc' => __('', 'vibe'),
	                        'desc' => __('Insert all or supported languages add one per line, DO NOT ADD ANY SPECIAL CHARACTERS in Sidebar name', 'vibe'),
						
	                    'std'=>''
                	)

				),

			);

	return $sections;
				
}

/**
* Get language options and list in the dropdown
*/
function get_languages_options($frontend='') {
	$languages = explode(PHP_EOL, vibe_get_option('lmslanguages') ) ;
	 
	$language_array = [];

	foreach ($languages as $lang ) {
		$language_array[] = array('value' => $lang, 'label'=> $lang );
	}

	// All meta is stored with vibe_ prefix
	$prefix = 'vibe_';

	$language_options =  array( // Single checkbox
			'label'	=> __('Course Language','vibe-customtypes'), // <label>
			'text'	=> __('Course Language','vibe-customtypes'), // for front end
			'desc'	=> __('Language of instruction.','vibe-customtypes'), // description
			'id'	=> $prefix.'course_language', // field id and name
			'type'	=> 'select', // type of field
	        'options' => $language_array,
	        'std'   => ''
	                );
	
	return $language_options;
}

//apply_filters('wplms_'.$metabox.'_metabox',$metabox_settings);

// Add Language to course metabox
add_filter('wplms_course_metabox','wpisle_add_language_meta');

function wpisle_add_language_meta($metabox_settings) {

	$languages = preg_split( '/\r\n|\r|\n/', vibe_get_option('lmslanguages') ) ;
	 
	$language_array = [];

	foreach ($languages as $lang ) {
		$language_array[] = array('value' => $lang, 'label'=> $lang );
	}

	// All meta is stored with vibe_ prefix
	$prefix = 'vibe_';

	$language_options =  array( // Single checkbox
			'label'	=> __('Course Language','vibe-customtypes'), // <label>
			'text'	=> __('Course Language','vibe-customtypes'), // for front end
			'desc'	=> __('Language of instruction.','vibe-customtypes'), // description
			'id'	=> $prefix.'course_language', // field id and name
			'type'	=> 'select', // type of field
	        'options' => $language_array,
	        'std'   => ''
	                );

	$metabox_settings[] = $language_options;

	return $metabox_settings;
}



// Add language to course widget
add_filter('wplms_course_details_widget','wplms_custom_course_details_information',9999999);
function wplms_custom_course_details_information($details){
	 ;

    $custom_info = get_post_meta(get_the_ID(),'vibe_course_language');
    if(isset($custom_info) && is_array($custom_info)){
        foreach($custom_info as $k=>$val){
            $details[]='<li>'.htmlspecialchars_decode($val).' <i class="fa fa-language" aria-hidden="true"></i></li>';
        }
    }
     
    return $details;
}




//include language in search query param
add_filter('query_vars','language_query_var');

function language_query_var($vars){
	$vars[] = 'lang';
	return $vars;
}


// Add language filter to query
add_action( 'pre_get_posts', 'lang_pre_get_posts', 1 );

function lang_pre_get_posts($query){
	
	$meta_query = array();
	if( !empty( get_query_var( 'lang' ) ) ){

		$meta_query[] = array( 'key' => 'vibe_course_language', 
								'value' => get_query_var( 'lang' ), 
								'compare' => '=' );
	}
	if( count( $meta_query ) > 1 ){
        $meta_query['relation'] = 'AND';
    }

    if( count( $meta_query ) > 0 ){
        $query->set( 'meta_query', $meta_query );
    }

}

// Display language selection in front end course creation under pricing

add_filter('wplms_course_creation_tabs','wpisle_create_course_unset_price',10);

function wpisle_create_course_unset_price($tabs) {
// Add language option
 	$languages = preg_split( '/\r\n|\r|\n/',vibe_get_option('lmslanguages'));//explode(PHP_EOL, vibe_get_option('lmslanguages') ) ;
	 
	$language_array = [];

	foreach ($languages as $lang ) {
		$language_array[] = array('value' => trim($lang) , 'label'=> trim($lang)  );
	}

	// All meta is stored with vibe_ prefix
	$prefix = 'vibe_';

	$course_id = intval($_GET['action']);

	//$language_selected = get_post_meta($course_id,$prefix.'course_language')[0];

	//var_dump($language_array);



	$language_options =  array( // Single checkbox
			'label'	=> __('Course Language','vibe-customtypes'), // <label>
			'text'	=> __('Course Language','vibe-customtypes'), // for front end
			'desc'	=> __('Language of instruction.','vibe-customtypes'), // description
			'id'	=> $prefix.'course_language', // field id and name
			'type'	=> 'select', // type of field
	        'options' => $language_array,
	        'std'   => ''
	                );
 	 
        // add language as one of fields in course pricing tab
 	$tabs['course_pricing']['fields'][] = $language_options;
	return $tabs;
}

// save language meta
add_action('wplms_front_end_save_course_pricing','wpisle_courses_create_as_product',100);

function wpisle_courses_create_as_product($course_id) {
	
 	$settings = json_decode( stripslashes($_POST['settings'])  );
	//lanugage meta
	$vibe_course_language = $settings[0];
	update_post_meta($course_id,$vibe_course_language->id,$vibe_course_language->value); 
	
}

include this code in child theme functions.php this would create a new option in the wplms theme option to add languages, Option is created in Advanced Search widget to include language drop-down, and language is displayed in course widget