写一个多节点ping接口php代码
<?php
$nodes = array("node1.example.com", "node2.example.com", "node3.example.com");
foreach($nodes as $node) {
$ping = exec("ping -c 1 ".$node);
if (strpos($ping, '0 received') === false) {
echo $node." is reachable
";
} else {
echo $node." is unreachable
";
} } ?>
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