How can incorrect file permissions lead to PHP errors related to fopen, fputs, and fclose functions?

Incorrect file permissions can lead to PHP errors related to fopen, fputs, and fclose functions because the PHP script may not have the necessary permissions to read from or write to the file. To solve this issue, you need to ensure that the file has the correct permissions set so that the PHP script can access it.

// Set the correct file permissions before opening the file
chmod("file.txt", 0644);

// Open the file with the correct permissions
$file = fopen("file.txt", "w");

// Write to the file
fputs($file, "Hello, world!");

// Close the file
fclose($file);