@john 在没什么干扰字符的情况下，如下：

[global_ip]

10.81.223.142:13306

10.86.92.213:13306

10.81.223.174:13306

[user_pass]

user:logstat

pass:logstat123

[db_name]

db1:db_mfw

db2:db_driserver

$ip = $port = $user = $pass = $db = '';

if ($configContent = trim(file_get_contents(__DIR__ . '/dbconfig.txt'))) {

$itemArray = explode("\n\n", $configContent);

if (!empty($itemArray)) {

foreach ($itemArray as $item) {

$subItemArr = explode("\n", $item);

var_dump($subItemArr);

if (!empty($subItemArr) && is_array($subItemArr)) {

// 随机取一个ip和port

if (false !== strpos($subItemArr[0], 'global_ip')) {

unset($subItemArr[0]);

$ipPortPair = $subItemArr[array_rand($subItemArr)];

list($ip, $port) = explode(":", $ipPortPair);

}

// 取user和pass

if (false !== strpos($subItemArr[0], 'user_pass')) {

list($temp, $user) = explode(":", $subItemArr[1]);

list($temp, $pass) = explode(":", $subItemArr[2]);

}

// 随机取一个db

if (false !== strpos($subItemArr[0], 'db_name')) {

unset($subItemArr[0]);

$dbItem = $subItemArr[array_rand($subItemArr)];

list($temp, $db) = explode(":", $dbItem);

}

}

}

}

}

var_dump($ip, $port, $user, $pass, $db);