What is the issue with maintaining the original date of a source file during a file upload process in PHP?

When uploading a file in PHP, the original date of the source file is not maintained by default. This can be an issue if the date information is important for tracking or version control purposes. To solve this, you can use the `touch()` function in PHP to set the modification time of the uploaded file to match the original date. 

// Get the original modification time of the source file
$originalModTime = filemtime($_FILES['file']['tmp_name']);

// Upload the file
move_uploaded_file($_FILES['file']['tmp_name'], 'uploads/' . $_FILES['file']['name']);

// Set the modification time of the uploaded file to match the original date
touch('uploads/' . $_FILES['file']['name'], $originalModTime);

Keywords

file upload PHP original date source file maintenance

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