Append File

Appending adds new text after the existing file content.

append_file.php

<?php
$line = ;
$file = "php_append_file.txt";

file_put_contents($file, "first\n");
file_put_contents($file, $line . "\n", FILE_APPEND);
$content = trim(file_get_contents($file));
unlink($file);

echo "line=" . $line . "\n";
echo "content=" . str_replace("\n", "|", $content) . "\n";

<?php
$line = ;
$file = "php_append_file.txt";

file_put_contents($file, "first\n");
file_put_contents($file, $line . "\n", FILE_APPEND);
$content = trim(file_get_contents($file));
unlink($file);

echo "line=" . $line . "\n";
echo "content=" . str_replace("\n", "|", $content) . "\n";

<?php
$line = ;
$file = "php_append_file.txt";

file_put_contents($file, "first\n");
file_put_contents($file, $line . "\n", FILE_APPEND);
$content = trim(file_get_contents($file));
unlink($file);

echo "line=" . $line . "\n";
echo "content=" . str_replace("\n", "|", $content) . "\n";

append `FILE_APPEND` keeps previous content and adds the next string at the end.