Validaciones numeros con float PHP

 public static function isFloat($value)
  {
    $expresionfloat =  "/^(-?)(\d{1,3}\,)(\d{3,3}\,){1,10}(\.\d+)$/";
    $expresionfloat_1 =  "/^(-?)(\d{1,10})(\.\d+)$/";
    $expresionfloat_2 =  "/^(-?)(\d{1,3}\,){1,10}(\d{3,3})(\.\d+)$/";
    $expresionfloat_3 =  "/^(-?)(\d{1,20})$/";
    $expresionfloat_4 =  "/^(-?)(\d{1,20})(\.\d+)$/";

    if(preg_match($expresionfloat,$value) || preg_match($expresionfloat_1,$value) || preg_match($expresionfloat_2,$value) || preg_match($expresionfloat_3,$value) || preg_match($expresionfloat_4,$value) ) return true;
    else return false;
  }

  public static function isFloatVE($value)
  {
    $expresionfloatVE =  "/^(\d{1,3}\.)(\d{3,3}\.){1,10}(\,\d+)$/";
    $expresionfloatVE_1 =  "/^(\d{1,10})(\.\d+)$/";
    $expresionfloatVE_2 =  "/^(\d{1,3}\.){1,10}(\d{3,3})(\,\d+)$/";
    $expresionfloatVE_3 =  "/^(\d{1,20})$/";
    $expresionfloatVE_4 =  "/^(\d{1,20})(\,\d+)$/";

    if(preg_match($expresionfloatVE,$value) || preg_match($expresionfloatVE_1,$value) || preg_match($expresionfloatVE_2,$value) || preg_match($expresionfloatVE_3,$value) || preg_match($expresionfloatVE_4,$value) ) return true;
    else return false;