PHP的fwrite能并发执行?
$f2 = fopen('file/index.txt','w');
fwrite($f2,$h.$old);
fclose($f2);
例如: 制作留言板. 没有使用MySQL等软件. 直接把留言写入一个.txt文件里.
如果在高峰时期, 同一秒内有50,000人留言.
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PHP能并发执行, 不会出错?
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