100行代码实现PHP对.ini文件的CURD操作

<?php
/**
* PHP操作ini文件类
* @author Wigiesen - 心语难诉
* @version v1.0
* @link https://xinyu19.com
* 注：ini文件由节、键、值组成，为了方便
* 类中的[节]我们叫做[分类]，[键=>值]称为[子项]
*/

class iniFile
{
    public $iniFilePath;
    public $iniFileHandle;
    function __construct($iniFilePath)
    {
        $this->iniFilePath = $iniFilePath;
        # 读入 .ini 文件到句柄中
        if (file_exists($this->iniFilePath)) {
            $this->iniFileHandle = parse_ini_file($this->iniFilePath, true);
            if (empty($this->iniFileHandle)) die($this->iniFilePath . ' file is null');
        }else{
            die($this->iniFilePath . ' file cannot be opened');
        }
    }
    //增加分类
    public function addCategory($category_name,array $item = []){
        if (!isset($this->iniFileHandle[$category_name])) {
            $this->iniFileHandle[$category_name] = [];
        }else{
            if (!empty($item)) {
                foreach ($item as $key => $value) {
                    $this->iniFileHandle[$category_name][$key] = $value;
                }
            }
        }
        $this->save();
    }
    //增加子项[可在添加分类的同时添加子项]
    public function addItem($category_name, array $item){
        foreach ($item as $key => $value) {
            $this->iniFileHandle[$category_name][$key] = $value;
        }
        $this->save();
    }
    //获取所有
    public function getAll(){
        return $this->iniFileHandle;
    }
    //获取单个分类
    public function getCategory($category_name){
        return $this->iniFileHandle[$category_name];
    }
    //获取子项值
    public function getItem($category_name, $item_name){
        # 如果是获取多个子项,则循环读取放入新变量
        if (is_array($item_name)) {
            $arr = array();
            foreach ($item_name as $value) {
                $arr[$value] = $this->iniFileHandle[$category_name][$value];
            }
            return $arr;
        }else{
            return $this->iniFileHandle[$category_name][$item_name];
        }
    }
    //更改ini
    public function updItem($category_name, array $item){
        foreach ($item as $key => $value) {
            $this->iniFileHandle[$category_name][$key] = $value;
        }
        $this->save();
    }
    //删除分类
    public function delCategory($category_name){
        unset($this->iniFileHandle[$category_name]);
        $this->save();
    }
    //删除子项
    public function delItem($category_name, $item_name)    {
        unset($this->iniFileHandle[$category_name][$item_name]);
        $this->save();
    }
    //保存.ini文件
    public function save(){
        $string = '';
        # 循环句柄，拼接成ini格式的字符串
        foreach ($this->iniFileHandle as $key => $value) {
            $string .= '['.$key.']'."\r\n";
            foreach ($value as $k => $v) {
                $string .= "$k = $v\r\n";
            }
        }
        $iniFileHandle = fopen($this->iniFilePath, 'w+');
        $isfwrite = fwrite($iniFileHandle, $string);
        if ($isfwrite) {
            fclose($iniFileHandle);
            return true;
        }else{
            fclose($iniFileHandle);
            return false;
        }
    }
}
?>

# 实例化ini文件操作类，并载入 .ini文件
$iniFile = new iniFile('./config.ini');
# 添加一个分类
$iniFile->addCategory('config');
# 添加一个分类并直接添加子项
$iniFile->addCategory('config', ['test1' => 123, 'test2' => 456]);
# 添加一个子项(如果子项存在，则覆盖;)
$iniFile->addItem('config',['test1' => 123]);
# 删除一个分类
$iniFile->delCategory('config');
# 删除一个子项
$iniFile->delItem('config', 'test1');
# 修改一个分类下子项的值(也可以修改多个)
$iniFile->updItem('config', ['test1' => 789]);
# 获取一个分类下所有数据
print_r($iniFile->getCategory('config'));
# 获取一个分类下某个子项的值
print_r($iniFile->getItem('config','test1'));
# 获取一个分类下多个子项的值
print_r($iniFile->getItem('config',['test1', 'test2']));
# 获取ini文件中所有分类及子项
print_r($iniFile->getAll());
# 或者
print_r($iniFile->iniFileHandle);