<?php

$min = 0;
$max = 1000;
$toGuess = rand($min,$max);

$average = $max / 2;
$proposition = $average;
$i = 2;

do {
  if($proposition > $toGuess)
  {
    echo 'Moins'.PHP_EOL;
    $proposition -= floor($average/$i);
  }
  else if($proposition < $toGuess)
  {
    echo 'Plus'.PHP_EOL;
    $proposition += floor($average/$i);
  }
  else{
    echo 'Le chiffre était '.$toGuess.PHP_EOL;
  }
  $i++;
  echo $i;
} while ($proposition != $toGuess);