The fclose Function
The fclose function closes an open file descriptor, freeing system resources. It takes a file handle parameter that was previously obtained using the fopen function. The function returns true on successfully closing the file and false on error.
Syntax
fclose(resource $handle): bool
Example
Let's open a file for writing, write data to it, and close it:
<?php
$file = fopen('test.txt', 'w');
fwrite($file, 'Hello World');
$res = fclose($file);
var_dump($res);
?>
Code execution result:
true
Example
Let's try to close a non-existent descriptor:
<?php
$res = fclose(null);
var_dump($res);
?>
Code execution result:
false
Example
Let's handle an exceptional situation:
<?php
$file = fopen('data.txt', 'w');
try {
fwrite($file, 'data');
} finally {
fclose($file);
}
?>
