What is the significance of the line "$rows[] = 0" in the PHP code provided?

The line "$rows[] = 0" is significant because it is adding a value of 0 to the end of the $rows array. This can be useful for initializing an array with a default value or placeholder. If the intention is to populate the array with actual data, then this line should be replaced with the appropriate data or removed altogether.

// Initialize an empty array
$rows = [];

// Populate the array with actual data
$rows = [1, 2, 3, 4, 5];