file write in php append code example

Example 1: php append to file

// LOCK_EX will prevent anyone else writing to the file at the same time
// PHP_EOL will add linebreak after each line
$txt = "data-to-add";
$myfile = file_put_contents('logs.txt', $txt.PHP_EOL , FILE_APPEND | LOCK_EX);

// Second option is this
$myfile = fopen("logs.txt", "a") or die("Unable to open file!");
$txt = "user id date";
fwrite($myfile, "\n". $txt);
fclose($myfile);

Example 2: file_put_contents php json file

$data[] = $_POST['data'];

$inp = file_get_contents('results.json');
$tempArray = json_decode($inp);
array_push($tempArray, $data);
$jsonData = json_encode($tempArray);
file_put_contents('results.json', $jsonData);

Example 3: appending txt file from php

$log_content="This line is logged on 2020-08-14 09:55:00";
$myfile = fopen("log.txt", "a") or die("Unable to open file!");
fwrite($myfile, $log_content);
fclose($myfile);