Format french phone number

gistfile1.php

/**
 * Format french phone number
 * @param [string] $tel     Phone number to format
 * @return string           Conventional human readable phone number
 */
function FormatTel($tel) {
	$t = ereg_replace("[^0-9]", "", $tel);
	if (strlen($t) === 10) {
		return substr(chunk_split($t, 2, " "), 0, -1);
	} else if (preg_match('/^\(?\+?33/', $tel)) {
		if (strlen($t) === 11) return '+33 ' . $t[2] . ' ' . substr(chunk_split(substr($t, 3), 2, " "), 0, -1);
	}
	return $tel;
}

echo FormatTel("+33 1 23 45 67 89"); //retourne 01 23 45 67 89
echo '<br>';
echo FormatTel("+33 1.23-45 67 89"); //retourne 01 23 45 67 89
echo '<br>';
echo FormatTel("(+33) 123456789"); //retourne 01 23 45 67 89
echo '<br>';
echo FormatTel("01.23.45.67.89"); //retourne 01 23 45 67 89
echo '<br>';
echo FormatTel("01-23-45-67-89"); //retourne 01 23 45 67 89
echo '<br>';
echo FormatTel("33 12345.6890"); //retourne 33 12345.6890