What are some resources or functions in PHP that can be helpful for handling file I/O operations and data manipulation tasks efficiently?

When handling file I/O operations and data manipulation tasks in PHP, it is important to utilize functions and resources that can efficiently manage these tasks. Some helpful resources include file handling functions such as fopen, fwrite, and fclose for reading and writing files, as well as functions like file_get_contents and file_put_contents for simpler file operations. Additionally, PHP provides functions for data manipulation such as array_map, array_filter, and array_reduce which can be used to efficiently manipulate arrays and data structures.

// Example of reading a file using file_get_contents
$file_contents = file_get_contents('example.txt');
echo $file_contents;

// Example of writing to a file using file_put_contents
$data = "Hello, World!";
file_put_contents('output.txt', $data);

// Example of array manipulation using array_map
$numbers = [1, 2, 3, 4, 5];
$multiplied_numbers = array_map(function($num) {
    return $num * 2;
}, $numbers);
print_r($multiplied_numbers);