php文件操作技巧FileSystem

1.获取目前下的子目录(目录下的所有同级文件包括文件夹)
php代码

$path = '/data/logs';$dirChirdenList = scandir($path);var_dump($dirChirdenList);

输出

array(28) {  [0] => string(1) "."  [1] => string(2) ".."  [2] => string(8) "activity"  [3] => string(5) "admin"  [4] => string(4) "auth"  [5] => string(13) "codeexception"  [6] => string(6) "coobar"  [7] => string(16) "coobar_error_log"  [8] => string(4) "cron"  [9] => string(9) "http_api6"  [10] => string(13) "http_service6"  [11] => string(8) "http_sso"  [12] => string(5) "nginx"  [13] => string(3) "pay"  ....  ...}

php代码

$handler = opendir('/data/logs');$files = [];while( ($filename = readdir($handler)) !== false ) {  $files[] = $filename;}closedir($handler);var_dump($files);

输出

array(28) {  [0] => string(6) "wallet"  [1] => string(13) "codeexception"  [2] => string(19) "php-fpm54.error.log"  [3] => string(15) "php54.error.log"  [4] => string(17) "php-fpm.error.log"  [5] => string(7) "upgrade"  [6] => string(18) "php-fpm54.slow.log"  [7] => string(4) "auth"  [8] => string(8) "activity"  [9] => string(16) "coobar_error_log"  [10] => string(13) "http_service6"  [11] => string(3) "sql"  [12] => string(1) "."  [13] => string(6) "rsyncd"  ...  ...}

递归获取该文件下所有文件

$dir = "/databackup/php18/logs/codeexception";$fileList = [];$result = getDirFile($dir,$fileList);function getDirFile($dir,&$fileList){    $handler = opendir($dir);    while (($filename = readdir($handler)) !== false) {        if ($filename == '.' || $filename == '..') {            continue;        }        if (is_dir($dir . "/" . $filename)) {            getDirFile($dir . "/" . $filename,$fileList);        } else {            $fileList[] = $dir . "/" . $filename;        }    }    closedir($handler);    return true;}

2.将日志文件变成一个数组 每一行一个key （不推荐打开大文件内容 容易内存溢出）
文件内容

row1row2row3row4row5row6

php代码

$rows = file('/home/hls/test/test.log);var_dump($rows);

输出

array(6) {  [0] => string(5) "row1"  [1] => string(5) "row2"  [2] => string(5) "row3"  [3] => string(5) "row4"  [4] => string(5) "row5"  [5] => string(5) "row6"}

3.逐行读取文件内容（适合大文件 文件分析）

文件内容

row1row2row3row4row5row6

php代码

$handler = fopen('/home/hls/test/test.log','r');$rows = [];while (!feof($handler)) {  $row = fgets($handler);  if ($row !== false) {     $rows[] = $row;  }}fclose($handler);dump($rows);exit;

输出

array(6) {  [0] => string(5) "row1"  [1] => string(5) "row2"  [2] => string(5) "row3"  [3] => string(5) "row4"  [4] => string(5) "row5"  [5] => string(5) "row6"}