if then statement in php function - php

Question

I am a PHP beginner. I have trouble to making a basic if/then statement on function.
I add a woocommerce product tab 'Food_paring', I want to disable the tab when the field 'food_pairing" is empty/not set.
original code:
add_filter( 'woocommerce_product_tabs', 'new_product_tab' );
function new_product_tab( $tabs ) {
/* Adds the new tab */
$tabs['test_tab'] = array(
'title' => __( 'Food Pairing', 'woocommerce' ),
'priority' => 50,
'callback' => 'food_pairing_tab_content'
);
return $tabs; /* Return all tabs including the new New Custom Product Tab to display */
}
function food_pairing_tab_content() {
/* The new tab content */
echo '<h2>Food Pairing</h2><p id="tab-food-pairing">', get_post_meta( get_the_ID(), 'food_pairing', true ), '</p>';
}

Answer 1

Please check below code. Before add tab check if product meta has value or not global $post; if(get_post_meta($post->ID, 'food_pairing', true )){..}
add_filter( 'woocommerce_product_tabs', 'new_product_tab' );
function new_product_tab( $tabs ) {
global $post;
/* Adds the new tab */
if(get_post_meta($post->ID, 'food_pairing', true ))
{
$tabs['test_tab'] = array(
'title' => __( 'Food Pairing', 'woocommerce' ),
'priority' => 50,
'callback' => 'food_pairing_tab_content'
);
}
return $tabs; /* Return all tabs including the new New Custom Product Tab to display */
}
function food_pairing_tab_content() {
/* The new tab content */
echo '<h2>Food Pairing</h2><p id="tab-food-pairing">', get_post_meta( get_the_ID(), 'food_pairing', true ), '</p>';
}

Answer 2

add_filter( 'woocommerce_product_tabs', 'woo_new_product_tab' );
function woo_new_product_tab( $tabs ) {
global $woocommerce;
$tabs['desc_tab'] = array(
'title' => __( 'Ingredients', 'woocommerce' ),
'priority' => 50,
'callback' => 'woo_new_product_tab_content' ,
);
return $tabs;
}
function woo_new_product_tab_content() {
// The new tab content
echo '<p>Lorem Ipsum</p>';
echo $prod_id = get_the_ID();
echo'<p>'.get_post_meta($prod_id,'ingredients',true).'</p>';
}
this code is properly working... should try . Good Luck