PHP读写大文件操作

配置项

$fileNameRead = 'a.log';//路径 + 文件名

$fileNameWrite = 'b.log';

//每次读取的字符40K 根据实际情况以及服务器的IO来调整这个参数

$chunk = 40960;

$charCount = filesize($fileNameRead);

$fpRead = fopen($fileNameRead, 'r');

$fpWrite = fopen($fileNameWrite, 'a');

for ($i = 0; $i < $charCount; $i += $chunk) {

fseek($fpRead, $i);

fwrite($fpWrite, fread($fpRead, $chunk));

}

fclose($fpWrite);

fclose($fpRead);