php读取文件夹 phptxt 扫描txt文件效率 对比
# 获取一个 txt 文件中的txt文件数量（一层）
function guiyi_txt_pro_txt_num2($path_txt)
{
$path_txt = rtrim($path_txt, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR; // 确保路径以斜杠结尾
if (!is_dir($path_txt)) {
return 0;
}
$txt_files = scandir($path_txt);// 一次性读取目录内容
$txt_files = array_diff($txt_files, ['.', '..']);
$count = 0;
foreach ($txt_files as $file) {
if (strtolower(substr($file, -4)) === '.txt') {
$count++;
}
}
return $count;
}
# 获取一个 txt 文件中的txt文件数量（一层）
function guiyi_txt_pro_txt_num($path_txt)
{
$path_txt = rtrim($path_txt, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR; // 确保路径以斜杠结尾
// 检查路径是否存在且是目录
if (!is_dir($path_txt)) {
return 0;
}
$txt_files = glob($path_txt . '*.txt', GLOB_NOSORT); // 使用 glob 函数查找 .txt 文件（更高效且简洁）
return count($txt_files);
}
$path_ceshi = "G:/phpstudy_pro/WWW/www.zblog.cn/zb_users/plugin/guiyi_txt_pro/txt/179955/";
// 使用 scandir
$start = hrtime(true);
for ($i = 0; $i < 100; $i++) {
guiyi_txt_pro_txt_num2($path_ceshi);
}
$end = hrtime(true);
echo "scandir time: " . ($end - $start) . " seconds MY\n";
$start2 = hrtime(true);
for ($i = 0; $i < 100; $i++) {
guiyi_txt_pro_txt_num($path_ceshi);
}
$end2 = hrtime(true);
echo "scandir time: " . ($end2 - $start2) . " seconds\n";win下对比
scandir time: 99460000 seconds MY
scandir time: 3634966000 seconds
linux服务器对比差别不大
虽然
$txt_files = glob($path_txt . '*.txt', GLOB_NOSORT);
更简洁 但是 还是 自己循环效率更高