What is the significance of using the rtrim() function when reading lines from a file in PHP?

When reading lines from a file in PHP, it is important to use the rtrim() function to remove any trailing whitespace characters, such as spaces or newlines, from the end of each line. This ensures that the data is clean and does not contain any unwanted characters that could affect processing or output. 

$file = fopen("data.txt", "r");

if ($file) {
    while (($line = fgets($file)) !== false) {
        $line = rtrim($line); // Remove trailing whitespace
        // Process the line here
    }

    fclose($file);
} else {
    echo "Error opening file.";
}

Keywords

rtrim function file PHP significance

Related Questions