how to create if statements in variable php code example

Example 1: php if elseif

$a = random_int(0, 10);
$b = random_int(0, 10);
if ($a > $b) {
  echo 'a is greater than b';
} elseif ($a == $b) {
  echo 'a is equal to b';
} else {
  echo 'a is less than b';
}

Example 2: php if

<?php
if ($a > $b)
  echo "a is bigger than b";
?>