How can the length discrepancy between the expected output and the actual output in the provided PHP code snippet be explained and resolved?

The length discrepancy between the expected output and the actual output in the provided PHP code snippet can be explained by the incorrect use of the `array_push` function. To resolve this issue, the correct way to add elements to an array is by using square brackets directly. By replacing `array_push($numbers, $i);` with `$numbers[] = $i;`, the expected output will match the actual output.

<?php
$numbers = [];
for ($i = 1; $i <= 10; $i++) {
    $numbers[] = $i;
}
print_r($numbers);
?>