How to sort php files by modification time

How to sort PHP files by modification time: 1. Traverse the files in the directory through the "function printdir($dir){...}" method; 2. Use the "function arraysort($aa) {. ..}" method can sort the returned array by modification time.

#The operating environment of this article: Windows 7 system, PHP version 7.4, Dell G3 computer.

php How to sort files by modification time?

php Traverse files in a directory and sort them by modification time Operation example

php Method of traversing files in a directory :

//遍历目录下文件方法
function printdir($dir)
{
    $files = array();
    //opendir() 打开目录句柄
    if($handle = @opendir($dir)){
    //readdir()从目录句柄中（resource，之前由opendir()打开）读取条目,
    // 如果没有则返回false
        while(($file = readdir($handle)) !== false){//读取条目
            if( $file != ".." && $file != "."){//排除根目录
                if(is_dir($dir . "/" . $file)) {//如果file 是目录，则递归
                    $files[$file] = printdir($dir . "/" . $file);
                } else {
                    //获取文件修改日期
                    $filetime = date('Y-m-d H:i:s', filemtime($dir . "/" . $file));
                    //文件修改时间作为健值
                    $files[$filetime] = $file;
                }
            }
        }
        @closedir($handle);
        return $files;
    }
}

Sort the returned array by time

//根据修改时间对数组排序
function arraysort($aa) {
    if( is_array($aa)){
        ksort($aa);
        foreach($aa as $key => $value) {
            if (is_array($value)) {
                $arr[$key] = arraysort($value);
            } else {
                $arr[$key] = $value;
            }
        }
        return $arr;
    } else {
        return $aa;
    }
}
$dir = "/php";
//输出 /php 下所有文件
print_r(arraysort(printdir($dir)));

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