A PHP file and folder operation class written by myself (create, delete, move, copy)

/**
 * Manipulate file classes
 *
 * Example:
 * FileUtil::createDir('a/1/2/3'); Test the creation of a folder to create a folder a/1/2/3
 * FileUtil::createFile ('b/1/2/3'); Test the creation file. Create a 3-file under the b/1/2/ folder
 * FileUtil::createFile('b/1/2/3.exe'); Test Create a file. Create a 3.exe file under the b/1/2/ folder
 * FileUtil::copyDir('b','d/e'); Test copy the folder and create a d/e folder, put b Copy the contents of the folder into it
 * FileUtil::copyFile('b/1/2/3.exe','b/b/3.exe'); Test copying files to create a b/b folder and put Copy the 3.exe file in the b/1/2 folder
 * FileUtil::moveDir('a/','b/c'); Test moving the folder to create a b/c folder and put the a file Move the contents of the folder into it and delete the a folder
 * FileUtil::moveFile('b/1/2/3.exe','b/d/3.exe'); Test moving files to create a b/d folder and move the 3.exe in b/1/2 into it
 * FileUtil::unlinkFile('b/d/3.exe'); Test deleting the file and delete the b/d/3.exe file
 * FileUtil ::unlinkDir('d'); Test deleting the folder and deleting the d folder
*/
class FileUtil {
    /**
 * Create folder
 *
 * @param string $aimUrl
 * @return viod
*/
    function createDir($aimUrl) {
        $aimUrl = str_replace('', '/', $aimUrl);
        $aimDir = '';
        $arr = explode('/', $aimUrl);
        $result = true;
        foreach ($arr as $str) {
            $aimDir .= $str . '/';
            if (!file_exists($aimDir)) {
                $result = mkdir($aimDir);
            }
        }
        return $result;
    }
    /**
 * Create file
 *
 * @param string $aimUrl
 * @param boolean $overWrite This parameter controls whether to overwrite the original file
 * @return boolean
*/
    function createFile($aimUrl, $overWrite = false) {
        if (file_exists($aimUrl) && $overWrite == false) {
            return false;
        } elseif (file_exists($aimUrl) && $overWrite == true) {
            FileUtil :: unlinkFile($aimUrl);
        }
        $aimDir = dirname($aimUrl);
        FileUtil :: createDir($aimDir);
        touch($aimUrl);
        return true;
    }
    /**
 * Move folder
 *
 * @param string $oldDir
 * @param string $aimDir
 * @param boolean $overWrite This parameter controls whether to overwrite the original file
 * @return boolean
*/
    function moveDir($oldDir, $aimDir, $overWrite = false) {
        $aimDir = str_replace('', '/', $aimDir);
        $aimDir = substr($aimDir, -1) == '/' ? $aimDir : $aimDir . '/';
        $oldDir = str_replace('', '/', $oldDir);
        $oldDir = substr($oldDir, -1) == '/' ? $oldDir : $oldDir . '/';
        if (!is_dir($oldDir)) {
            return false;
        }
        if (!file_exists($aimDir)) {
            FileUtil :: createDir($aimDir);
        }
        @ $dirHandle = opendir($oldDir);
        if (!$dirHandle) {
            return false;
        }
        while (false !== ($file = readdir($dirHandle))) {
            if ($file == '.' || $file == '..') {
                continue;
            }
            if (!is_dir($oldDir . $file)) {
                FileUtil :: moveFile($oldDir . $file, $aimDir . $file, $overWrite);
            } else {
                FileUtil :: moveDir($oldDir . $file, $aimDir . $file, $overWrite);
            }
        }
        closedir($dirHandle);
        return rmdir($oldDir);
    }
    /**
 * Move file
 *
 * @param string $fileUrl
 * @param string $aimUrl
 * @param boolean $overWrite This parameter controls whether to overwrite the original file
 * @return boolean
*/
    function moveFile($fileUrl, $aimUrl, $overWrite = false) {
        if (!file_exists($fileUrl)) {
            return false;
        }
        if (file_exists($aimUrl) && $overWrite = false) {
            return false;
        } elseif (file_exists($aimUrl) && $overWrite = true) {
            FileUtil :: unlinkFile($aimUrl);
        }
        $aimDir = dirname($aimUrl);
        FileUtil :: createDir($aimDir);
        rename($fileUrl, $aimUrl);
        return true;
    }
    /**
 * Delete folder
 *
 * @param string $aimDir
 * @return boolean
*/
    function unlinkDir($aimDir) {
        $aimDir = str_replace('', '/', $aimDir);
        $aimDir = substr($aimDir, -1) == '/' ? $aimDir : $aimDir . '/';
        if (!is_dir($aimDir)) {
            return false;
        }
        $dirHandle = opendir($aimDir);
        while (false !== ($file = readdir($dirHandle))) {
            if ($file == '.' || $file == '..') {
                continue;
            }
            if (!is_dir($aimDir . $file)) {
                FileUtil :: unlinkFile($aimDir . $file);
            } else {
                FileUtil :: unlinkDir($aimDir . $file);
            }
        }
        closedir($dirHandle);
        return rmdir($aimDir);
    }
    /**
 * Delete file
 *
 * @param string $aimUrl
 * @return boolean
*/
    function unlinkFile($aimUrl) {
        if (file_exists($aimUrl)) {
            unlink($aimUrl);
            return true;
        } else {
            return false;
        }
    }
    /**
 * Copy folder
 *
 * @param string $oldDir
 * @param string $aimDir
 * @param boolean $overWrite This parameter controls whether to overwrite the original file
 * @return boolean
*/
    function copyDir($oldDir, $aimDir, $overWrite = false) {
        $aimDir = str_replace('', '/', $aimDir);
        $aimDir = substr($aimDir, -1) == '/' ? $aimDir : $aimDir . '/';
        $oldDir = str_replace('', '/', $oldDir);
        $oldDir = substr($oldDir, -1) == '/' ? $oldDir : $oldDir . '/';
        if (!is_dir($oldDir)) {
            return false;
        }
        if (!file_exists($aimDir)) {
            FileUtil :: createDir($aimDir);
        }
        $dirHandle = opendir($oldDir);
        while (false !== ($file = readdir($dirHandle))) {
            if ($file == '.' || $file == '..') {
                continue;
            }
            if (!is_dir($oldDir . $file)) {
                FileUtil :: copyFile($oldDir . $file, $aimDir . $file, $overWrite);
            } else {
                FileUtil :: copyDir($oldDir . $file, $aimDir . $file, $overWrite);
            }
        }
        return closedir($dirHandle);
    }
    /**
 * Copy file
 *
 * @param string $fileUrl
 * @param string $aimUrl
 * @param boolean $overWrite This parameter controls whether to overwrite the original file
 * @return boolean
*/
    function copyFile($fileUrl, $aimUrl, $overWrite = false) {
        if (!file_exists($fileUrl)) {
            return false;
        }
        if (file_exists($aimUrl) && $overWrite == false) {
            return false;
        } elseif (file_exists($aimUrl) && $overWrite == true) {
            FileUtil :: unlinkFile($aimUrl);
        }
        $aimDir = dirname($aimUrl);
        FileUtil :: createDir($aimDir);
        copy($fileUrl, $aimUrl);
        return true;
    }
}
?>

另一种调用方式（非静态调用）：

$fu = new FileUtil();
$fu->copyFile('a/1/2/3', 'a/1/2/4');