mf_extra.php

<?php
//funciones de uso general admin o fron-end

/** 
 * aux function 
 **/
if (!function_exists('pr')) {
  function pr($data){
    echo "<pre>";
    print_r($data);
    echo "</pre>";
  }
}

/* return true is MF ins plugin multinetwork */
if( !function_exists('mf_mu') ){
  function mf_mu(){
    if ( function_exists( 'is_multisite' ) )
      return is_multisite();

    return false;
  }
}

if( !function_exists('mf_mu2') ){

  function mf_mu2(){
    global $current_blog;
    if(isset($current_blog)){
      return true;
    }else{
      return false;
    }
  }

}

if ( !defined('DS') ){
  if (strpos(php_uname('s'), 'Win') !== false )
    define('DS', '\\');
  else 
    define('DS', '/');
}

if( !function_exists('mf_mu_alone') ){

  function mf_mu_alone(){
    $current = get_option('active_plugins');
    $plugin = plugin_basename(MF_PATH.'/main.php');

    if( in_array($plugin,$current) ) return true;

    return false;
  }

}

if( !function_exists('is_wp35') ){

  function is_wp35(){
    $wp_version = floatval(get_bloginfo('version'));

    if( $wp_version >= 3.5 ) return TRUE;

    return FALSE;
  }

}

if( !function_exists('is_wp39') ){

  function is_wp39(){
    $wp_version = floatval(get_bloginfo('version'));

    if( $wp_version >= 3.9 ) return TRUE;

    return FALSE;
  }

}

class Debug
{
  /**
   * Writes log info to a file
   * @param $msg string the message to write out
   * @param $path string the location to write the messages
   * @return null
   */
  static function log($msg,$path = "") {
    if(empty($path)){
      $path = MF_FILES_DIR;
    }

    if(!is_string($msg)){
      $msg = print_r($msg,true);
    }

    $fp = fopen($path.'magic_fields.log', 'a+');
    $date = gmdate( 'Y-m-d H:i:s' );
    fwrite($fp, "$date - $msg\n");
    fclose($fp);
   }
}