PHP：如何动态更改文件中的输出

Question

Redirect output do minified.js file

file_put_contents("minified.js", $packer->pack());

This redirects the output to the minified.js file. If I change anything in the code, the output is not updated in minified.js. I must always delete the content and run it again.

How can I do this dynamically and make the content in minified.js always replaced automatically?

Answer 1

Check the last modification time of the file where the original version is located.

$original_file = $_SERVER["DOCUMENT_ROOT"].'/main.js';

$last_modified = date("Y-m-d H:i:s", filemtime($original_file));

file_put_contents($last_modified, $_SERVER["DOCUMENT_ROOT"].'/date.txt');
$last_modified_read = file_get_contents($_SERVER["DOCUMENT_ROOT"].'/date.txt');

if(strtotime($last_modified_read) < strtotime($last_modified)){
  echo "Minify!";
  file_put_contents($_SERVER["DOCUMENT_ROOT"].'/date.txt', $last_modified);
}

filemtime()