cd /usr/bin/
link -s python3.5 python3<?php
$tests = array(
"1.01",
"1.01."
);
foreach ($tests as $element) {
if (is_numeric($element)) {
echo "'{$element}' - число", PHP_EOL;
} else {
echo "'{$element}' - НЕ число", PHP_EOL;
}
}