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<?php
function generate_random_string(int $length): string
{
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
$output = "";
for ($i = 0; $i < $length; $i++) {
$charindex = random_int(0, strlen($chars) - 1);
$output .= $chars[$charindex];
}
return $output;
}
function str_safe(string $s, int|null $max_length, bool $remove_new_lines = true): string
{
$output = $s;
if ($remove_new_lines) {
$output = str_replace(PHP_EOL, "", $output);
}
$output = htmlspecialchars($output);
$output = strip_tags($output);
if ($max_length) {
$output = substr($output, 0, $max_length);
}
$output = trim($output);
return $output;
}
function format_timestamp(int $timestamp_secs)
{
$days = floor($timestamp_secs / (60 * 60 * 24));
$hours = floor($timestamp_secs / (60 * 60) % 24);
$minutes = floor($timestamp_secs % (60 * 60) / 60);
$seconds = floor($timestamp_secs % 60);
if ($days == 0 && $hours == 0 && $minutes == 0) {
return "$seconds second" . ($seconds > 1 ? "s" : "");
} else if ($days == 0 && $hours == 0) {
return "$minutes minute" . ($minutes > 1 ? "s" : "");
} else if ($days == 0) {
return "$hours hour" . ($hours > 1 ? "s" : "");
} else {
return "$days day" . ($days > 1 ? "s" : "");
}
}
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