What potential pitfalls can occur when using is_dir() function in PHP?

When using the is_dir() function in PHP, a potential pitfall is that it may return false positives if the directory path provided is not valid or does not exist. To avoid this issue, it is important to validate the directory path before calling the is_dir() function. 

$directory = "/path/to/directory";

// Validate directory path before calling is_dir()
if (is_dir($directory)) {
    // Directory exists, do something
    echo "Directory exists.";
} else {
    // Directory does not exist or is not valid
    echo "Directory does not exist or is not valid.";
}

Keywords

is_dir PHP file system error handling directory detection

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