How can timestamps be used to compare file modification dates accurately in PHP?

When comparing file modification dates in PHP, using timestamps ensures accuracy as timestamps represent a specific point in time. To compare file modification dates accurately, you can retrieve the timestamps of the files using the `filemtime()` function and then compare them using standard comparison operators. 

$file1 = 'file1.txt';
$file2 = 'file2.txt';

$timestamp1 = filemtime($file1);
$timestamp2 = filemtime($file2);

if ($timestamp1 > $timestamp2) {
    echo "$file1 was modified more recently than $file2";
} elseif ($timestamp1 < $timestamp2) {
    echo "$file2 was modified more recently than $file1";
} else {
    echo "Both files were modified at the same time";
}

Keywords

timestamps file modification dates PHP comparison accuracy

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