Validation RegEx téléphone en PHP

phonenumber.php

<?php

$regex = "/^((?:\+?33|0)(?:[6-7]{1})(?:[\-\s\.]{0,}[0-9]{2})+)$/im";

$subjects = [
  '0601020304',
  '+33601020304',
  '33601020304',
  '06.01.02.-.03.04',
  '06-01---02-03-04',
  '06 01 02 03 04',
  '06 01 02   03  04',
];

foreach ($subjects as $key => $value) {
  $matches = [];
  preg_match($regex, $subjects[$key], $matches);

  if (count($matches)) {
    $match = $matches[0];
    $match = str_replace(['+33'], '0', $match);
    $number = str_replace(['.', '-', ' '], '', $match);
    echo $value . ' => ' . $number . PHP_EOL;
  }
}