<?php

$tests = [
  "1...1", 
  "2...2", 
  "10...10",
  "(1.).(.1)",
  "1. . .1", 
  "5.32..7",
  "3..(5.67)", 
  "3. . 5.67",
  "3.14 . 1.41"
];

foreach($tests as $test)
{
  printf("%-12s = ", $test);
  eval("echo $test;");
  echo PHP_EOL;
}