PHP - Difficulties Writing New Line [duplicate] - php

Question

This question already has answers here:
Writing a new line to file in PHP (line feed)
(4 answers)
Closed 6 years ago.
I am encountering difficulties with writing to a new line in a basic text file. All the other text (including the comma) appears just fine, but no new line (no space or anything either). I would greatly appreciate any direction.
<?php
session_start();
$user = $_SESSION['store'];
function format($input) {
$input = trim($input);
$input = stripcslashes($input);
$input = htmlspecialchars($input);
return $input;
}
$file = "messages/reminder.txt";
$image;
$secFreqLabel;
$freqLabel;
$uploadDirectory = "corpImages/";
if(!file_exists($file)) {
$temp = fopen($file, "w"); // create file
fclose($temp);
}
$con = new PDO("sqlite:bk.db");
if($_SERVER['REQUEST_METHOD'] == "POST") {
$secFreqLabel = 'reminder.jpg';
$freqLabel = 'reminderHourly.jpg';
$thirdFreqLabel = 'reminderThree.jpg';
$fourthFreqLabel = 'reminderFour.jpg';
$freqUploadFile = $uploadDirectory . $freqLabel;
$secFreqUploadFile = $uploadDirectory . $secFreqLabel;
$thirdFreqUploadFile = $uploadDirectory . $thirdFreqLabel;
$fourthFreqUploadFile = $uploadDirectory . $fourthFreqLabel;
$statement = $con->prepare("INSERT INTO slides (image, label) VALUES (:image, :label)");
if(!empty($_FILES['freqImage'])) {
$con->exec("DELETE FROM slides where label = 'reminder.jpg'");
}
if(!empty($_FILES['secFreqImage'])) {
$con->exec("DELETE FROM slides where label = 'reminderHourly.jpg'");
}
if(!empty($_FILES['thirdFreqImage'])) {
$con->exec("DELETE FROM slides where label = 'reminderThree.jpg'");
}
if(!empty($_FILES['fourthFreqImage'])) {
$con->exec("DELETE FROM slides where label = 'reminderFour.jpg'");
}
$image = file_get_contents($_FILES['freqImage']['tmp_name']);
move_uploaded_file($_FILES['freqImage']['tmp_name'], $freqUploadFile);
$statement->bindParam(":label", $freqLabel);
$statement->bindParam(":image", $image);
$statement->execute();
$image = file_get_contents($_FILES['secFreqImage']['tmp_name']);
move_uploaded_file($_FILES['secFreqImage']['tmp_name'], $secFreqUploadFile);
$statement->bindParam(":label", $secFreqLabel);
$statement->bindParam(":image", $image);
$statement->execute();
$image = file_get_contents($_FILES['thirdFreqImage']['tmp_name']);
move_uploaded_file($_FILES['thirdFreqImage']['tmp_name'], $thirdFreqUploadFile);
$statement->bindParam(":label", $thirdFreqLabel);
$statement->bindParam(":image", $image);
$statement->execute();
$image = file_get_contents($_FILES['fourthFreqImage']['tmp_name']);
move_uploaded_file($_FILES['fourthFreqImage']['tmp_name'], $fourthFreqUploadFile);
$statement->bindParam(":label", $fourthFreqLabel);
$statement->bindParam(":image", $image);
$statement->execute();
$text = format($_POST['freq']) . "," . format($_POST['freqMessage']) . "\n" . format($_POST['secFreq']) . "," . format($_POST['secFreqMessage']) . "\n" . format($_POST['thirdFreq']) . "," . format($_POST['thirdFreqMessage']) . "\n" . format($_POST['fourthFreq']) . "," . format($_POST['fourthFreqMessage']);
$writer = fopen($file, "w");
fwrite($writer, $text);
fclose($writer);
touch("update.txt");
}
$handler = fopen($file, "r");
$firstReminder = fgetcsv($handler, ",");
$secondReminder = fgetcsv($handler, ",");
$thirdReminder = fgetcsv($handler, ",");
$fourthReminder = fgetcsv($handler, ",");
fclose($handler);
?>

Answer 1

Instead of using \n use constant called PHP_EOL which represents end of line according to your enviroment.
PHP_EOL (string)
The correct 'End Of Line' symbol for this platform. Available since PHP 5.0.2
$text = format($_POST['freq']) . "," . format($_POST['freqMessage']) . PHP_EOL . format($_POST['secFreq']) . "," . format($_POST['secFreqMessage']) . PHP_EOL . format($_POST['thirdFreq']) . "," . format($_POST['thirdFreqMessage']) . PHP_EOL . format($_POST['fourthFreq']) . "," . format($_POST['fourthFreqMessage']);
PHP_EOL in windows will be CR+LF and in unix system LF
CR - Carriage Return, U+000D
LF - Line Feed, U+000A