This shortcode dynamically calculates and displays the remaining availability entries for a Gravity Forms form based on the number of form entries submitted and the entry limit settings.

gf_shortcode_show_remaining_entry_number.php

<?php
/**
 * Entries Remaining Shortcode
 * 
 * This shortcode dynamically calculates and displays the remaining availabile entries
 * for a Gravity Forms form based on the number of form entries submitted.
 *
 * Usage: Enable entry limits in form settings and set your limit number. Then add the shortcode [spots_available] to an
 *        HTML field in your form or to a WordPress post or page where a Gravity Form is embedded.
 * 
 * Author: Chris Eggleston
 * Version: 1.0
 * Credit: This code is an improved version of an idea and code snippet provided by Rowan Schoon of visualpower.agency
 * 
 *
 */

function check_spots_available($atts) {
    $post_id = get_the_ID();

    // Retrieve the content of the post
    $post_content = get_post_field('post_content', $post_id);
    error_log("Post Content: " . $post_content); // Log the post content for debugging

    $form_id = null;

    // Check for Gravity Forms shortcode in the post content
    if (preg_match('/\[gravityform.*?id="?(\d+)"?.*?\]/i', $post_content, $matches)) {
        $form_id = $matches[1];
        error_log("Form ID found via shortcode: " . $form_id);
    }

    // Check for Gravity Forms block editor embedding in the post content
    if (!$form_id && preg_match('/<!-- wp:gravityforms\/form {"formId":"(\d+)".*} \/-->/', $post_content, $matches)) {
        $form_id = $matches[1];
        error_log("Form ID found via block: " . $form_id);
    }

    // If no form ID is found, return an error message
    if (!$form_id) {
        return '<span style="color: red; display: block; padding: 10px; margin-top: 10px;">Error: Form not found in content.</span>';
    }

    // Retrieve the form settings using the Gravity Forms API
    $form_settings = GFAPI::get_form($form_id);

    // Fetch the entry limit from the form settings
    $limit = isset($form_settings['limitEntriesCount']) ? $form_settings['limitEntriesCount'] : 0;
    error_log("Dynamically fetched Entry limit: " . $limit);

    // If no entry limit is set, assume unlimited availability
    if ($limit == 0) {
        return "<span class='availability-label available' style='background-color: green; color: white; padding: 10px; margin-top: 15px; display: inline-block;'>Available</span>";
    }

    // Retrieve all active form entries count
    $search_criteria = array();
    $entry_count = GFAPI::count_entries($form_id, $search_criteria);

    // Handle errors in fetching entries
    if (is_wp_error($entry_count)) {
        return '<span style="color: red; display: block; padding: 10px; margin-top: 10px;">Error: Failed to fetch form entries.</span>';
    }

    error_log("Entry count: " . $entry_count);

    // Calculate the remaining spots
    $remaining = max($limit - $entry_count, 0);
    error_log("Remaining spots: " . $remaining);

    // Determine the availability status and style based on the remaining spots
    if ($remaining >= 5) {
        $label = "$remaining spots available";
        $status = 'available';
        $color = 'green';
    } elseif ($remaining > 0 && $remaining < 5) {
        $label = "only $remaining spots left";
        $status = 'almost-full';
        $color = 'orange';
    } else {
        $label = "Full";
        $status = 'full';
        $color = 'red';
    }

    // Return the styled availability label
    return "<span class='availability-label $status' style='background-color: $color; color: white; padding: 10px; margin-top: 15px; display: inline-block;'>$label</span>";
}

// Register the shortcode [spots_available] for use in WordPress content
add_shortcode('spots_available', 'check_spots_available');