S2OJ/web/app/controllers/judge/sync_judge_client.php

<?php
	requirePHPLib('judger');
	
	if (!authenticateJudger()) {
		become404Page();
	}
	
	foreach (DB::selectAll("select * from judger_info where ip != ''") as $judger) {
		$socket = fsockopen($judger['ip'], UOJConfig::$data['judger']['socket']['port']);
		if ($socket === false) {
			die("judge client {$judger['ip']} lost.");
		}
		fwrite($socket, json_encode([
			'password' => UOJConfig::$data['judger']['socket']['password'],
			'cmd' => 'update'
		]));
		fclose($socket);
	}
	
	die("ok");
	?>