What is the purpose of using chop() or rtrim() in PHP when processing text data read from a file?

When processing text data read from a file in PHP, it is common for unwanted characters such as whitespace or newline characters to be present at the end of each line. Using functions like chop() or rtrim() helps to remove these trailing characters, ensuring that the text data is clean and properly formatted for further processing. 

// Open the file for reading
$file = fopen("example.txt", "r");

// Read each line from the file and remove any trailing whitespace or newline characters
while (!feof($file)) {
    $line = rtrim(fgets($file));
    
    // Process the line here
    echo $line . "<br>";
}

// Close the file
fclose($file);

Keywords

PHP chop() rtrim() text data file processing

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