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PHP reads a certain line of data from a large file text TEXT

高洛峰
Release: 2016-10-14 10:30:17
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function get_line($file,$line) { $fp = fopen($file,'r'); $i = 0; while(!feof($fp)) { $i++; $c = fgets($fp); if($i==$line) { echo $c; break; } } }
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这个方式效率仍待考验 在一个apache的日志文件中(450M) 读取第20行非常之快 0.001039981842041 读取第200行0.0033199787139893 读取第2万行需要0.30908799171448 秒左右 读取第20万行2.5622429847717 seconds 已经到了无法忍受的地步
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