file_put_contents创建新文件

Question

My below script works when the cache file is already present, but does not create the initial first cache file itself.

Can somebody help me?
The folder permissions are fine.

<?php 
$cache_file = 'cachemenu/content.cache';

if(file_exists($cache_file)) {
  if(time() - filemtime($cache_file) > 86400) {

    ob_start();
    include 'includes/menu.php';
    $buffer = ob_get_flush();
    file_put_contents($cache_file, $buffer);

  } 

  else include 'cachemenu/content.cache';

}

?>

Answer 1

You're only writing to the file if it exists and it's old. You should change the if so it writes to it if it doesn't exist as well.

<?php 
$cache_file = 'cachemenu/content.cache';

if(!file_exists($cache_file) || time() - filemtime($cache_file) > 86400) {

    ob_start();
    include 'includes/menu.php';
    $buffer = ob_get_flush();
    file_put_contents($cache_file, $buffer); 
} else {
    include 'cachemenu/content.cache';
}

?>