array_intersect_assoc - PHP code example

PHP Function Array_Intersect_ASSOc

There are many PHP functions that are very useful in your day-to-day programming. Some of them are extremely simple while others are quite advanced and can help you do complex tasks. In this article, we’ll take a look at php function array_intersect_assoc which is a very useful function for comparing multiple arrays. It compares their keys and values and returns an array with only the elements that exist in all of them. It is particularly useful for associative arrays.

In order to understand this function, let’s take a look at the example below.

Array_intersect_assoc() Function

The array_intersect_assoc() function is an inbuilt PHP function that is used to compare the keys and values of multiple arrays. It is similar to the array_intersect() function but it allows you to use a user-defined comparison function instead of the default strcasecmp. It also supports more than two arrays as arguments.

Arguments

The argument of this function is a string that defines the callback function that will be used to compare the keys and values of the arrays. The comparison function is called with the first array as its argument and returns an integer that indicates whether or not the first array is less than, equal to or greater than the second array.

The key of the first array that will be compared is passed to the comparison function along with the index of the value of this array in the first array. Then the values of all arrays that match with this one are compared against the key and value of the first array. This is done recursively until the number of matches is equal to the count of all the arrays in the argument list.

array_intersect_assoc example

protected function isRouteActive($current_route_name, $route_name, $route_parameters) {
    // Flag the list element as active if this tab's route and parameters match     // the current request's route and route variables.     $active = $current_route_name == $route_name;
    if ($active) {
      // The request is injected, so we need to verify that we have the expected       // _raw_variables attribute.       $raw_variables_bag = $this->routeMatch->getRawParameters();
      // If we don't have _raw_variables, we assume the attributes are still the       // original values.       $raw_variables = $raw_variables_bag ? $raw_variables_bag->all() : $this->routeMatch->getParameters()->all();
      $active = array_intersect_assoc($route_parameters, $raw_variables) == $route_parameters;
    }
    return $active;
  }

}

    $languages = (array) apply_filters( 'signup_get_available_languages', get_available_languages() );

    /* * Strip any non-installed languages and return. * * Re-call get_available_languages() here in case a language pack was installed * in a callback hooked to the 'signup_get_available_languages' filter before this point. */
    return array_intersect_assoc( $languages, get_available_languages() );
}

// Main. $active_signup = get_site_option( 'registration', 'none' );

/** * Filters the type of site sign-up. * * @since 3.0.0 * * @param string $active_signup String that returns registration type. The value can be * 'all', 'none', 'blog', or 'user'. */

if (!$cache_dir) {
                    return false;
                }
                $cache_dir .= '/.php_cache_api/';
                return $this->_clean($cache_dir, $mode);
                break;
            case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
                $idlist = null;
                foreach ($tags as $tag) {
                    $next_idlist = output_cache_get(self::TAGS_PREFIX.$tag, $this->_directives['lifetime']);
                    if ($idlist) {
                        $idlist = array_intersect_assoc($idlist, $next_idlist);
                    } else {
                        $idlist = $next_idlist;
                    }
                    if (count($idlist) == 0) {
                        // if ID list is already empty - we may skip checking other IDs                         $idlist = null;
                        break;
                    }
                }
                if ($idlist) {
                    foreach ($idlist as $id) {