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first name: $fName
last name: $lName
email: $email
phone: $phone
HERE;
//generate output for text file
$output = $fName . "\t";
$output .= $lName . "\t";
$output .= $email . "\t";
$output .= $phone . "\n";
//open file for output
$fp = fopen("contacts.csv", "a");
//write to the file
fwrite($fp, $output);
fclose($fp);
?>