使用 php 将一个目录的全部内容复制到另一个目录

适用于一级目录。对于具有多级目录的文件夹，我使用了以下内容：

function recurseCopy(
    string $sourceDirectory,
    string $destinationDirectory,
    string $childFolder = ''
): void {
    $directory = opendir($sourceDirectory);

    if (is_dir($destinationDirectory) === false) {
        mkdir($destinationDirectory);
    }

    if ($childFolder !== '') {
        if (is_dir("$destinationDirectory/$childFolder") === false) {
            mkdir("$destinationDirectory/$childFolder");
        }

        while (($file = readdir($directory)) !== false) {
            if ($file === '.' || $file === '..') {
                continue;
            }

            if (is_dir("$sourceDirectory/$file") === true) {
                recurseCopy("$sourceDirectory/$file", "$destinationDirectory/$childFolder/$file");
            } else {
                copy("$sourceDirectory/$file", "$destinationDirectory/$childFolder/$file");
            }
        }

        closedir($directory);

        return;
    }

    while (($file = readdir($directory)) !== false) {
        if ($file === '.' || $file === '..') {
            continue;
        }

        if (is_dir("$sourceDirectory/$file") === true) {
            recurseCopy("$sourceDirectory/$file", "$destinationDirectory/$file");
        }
        else {
            copy("$sourceDirectory/$file", "$destinationDirectory/$file");
        }
    }

    closedir($directory);
}

如此处所述，这是另一种处理符号链接的方法：

/**
 * Copy a file, or recursively copy a folder and its contents
 * @author      Aidan Lister <aidan@php.net>
 * @version     1.0.1
 * @link        http://aidanlister.com/2004/04/recursively-copying-directories-in-php/
 * @param       string   $source    Source path
 * @param       string   $dest      Destination path
 * @param       int      $permissions New folder creation permissions
 * @return      bool     Returns true on success, false on failure
 */
function xcopy($source, $dest, $permissions = 0755)
{
    $sourceHash = hashDirectory($source);
    // Check for symlinks
    if (is_link($source)) {
        return symlink(readlink($source), $dest);
    }

    // Simple copy for a file
    if (is_file($source)) {
        return copy($source, $dest);
    }

    // Make destination directory
    if (!is_dir($dest)) {
        mkdir($dest, $permissions);
    }

    // Loop through the folder
    $dir = dir($source);
    while (false !== $entry = $dir->read()) {
        // Skip pointers
        if ($entry == '.' || $entry == '..') {
            continue;
        }

        // Deep copy directories
        if($sourceHash != hashDirectory($source."/".$entry)){
             xcopy("$source/$entry", "$dest/$entry", $permissions);
        }
    }

    // Clean up
    $dir->close();
    return true;
}

// In case of coping a directory inside itself, there is a need to hash check the directory otherwise and infinite loop of coping is generated

function hashDirectory($directory){
    if (! is_dir($directory)){ return false; }

    $files = array();
    $dir = dir($directory);

    while (false !== ($file = $dir->read())){
        if ($file != '.' and $file != '..') {
            if (is_dir($directory . '/' . $file)) { $files[] = hashDirectory($directory . '/' . $file); }
            else { $files[] = md5_file($directory . '/' . $file); }
        }
    }

    $dir->close();

    return md5(implode('', $files));
}