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<?php
namespace TheCodingMachine\GraphQL\Controllers\Cache;
use function filemtime;
/**
* A trait that validates a cache item based on a file modification time
*/
trait FileModificationTimeCacheValidatorTrait
{
* An array mapping the file name to its latest modification date.
*
* @var array<string, int>
protected $trackedFiles = [];
* Adds a file to track.
* All files must not have changed for the cache to be valid.
* @param string $fileName
public function addTrackedFile(string $fileName): void
$this->trackedFiles[$fileName] = filemtime($fileName);
}
* Returns true if this item is valid (coming out of cache), false otherwise.
* @return bool
public function isValid(): bool
foreach ($this->trackedFiles as $fileName => $mtime) {
if (filemtime($fileName) !== $mtime) {
return false;
return true;
thecodingmachine /
graphql-controllers
