In cases where it is not possible to modify the server settings, what alternative solutions can be considered to address memory limit errors in PHP?

Memory limit errors in PHP occur when the amount of memory allocated to a script exceeds the limit set in the server configuration. If it's not possible to modify the server settings, alternative solutions include optimizing the code to use memory more efficiently, unsetting variables when they are no longer needed, and breaking up large tasks into smaller chunks to reduce memory usage.

// Example of optimizing code to use memory more efficiently
$largeArray = range(1, 1000000); // Create a large array
$sum = 0;
foreach ($largeArray as $value) {
    $sum += $value;
}
unset($largeArray); // Unset the large array to free up memory
echo $sum;