在Codeigniter中将缩略图裁剪为方形

$this->load->library('image_lib');

// 设置原始图像路径和输出图像路径
$source_image = '/path/to/original/image.jpg';
$target_image = '/path/to/output/image.jpg';

// 初始化图像处理库
$this->image_lib->initialize(array(
    'image_library' => 'gd2',
    'source_image' => $source_image,
    'new_image' => $target_image
));

// 调整图像大小
$this->image_lib->resize(200, 200);

// 获取调整后的图像宽度和高度
$width = $this->image_lib->get_image_width();
$height = $this->image_lib->get_image_height();

// 确定较短的边
$shorter_side = min($width, $height);

// 计算裁剪的起始点和裁剪的宽度和高度
$x = ($width - $shorter_side) / 2;
$y = ($height - $shorter_side) / 2;
$size = $shorter_side;

// 裁剪图像为方形
$this->image_lib->crop($size, $size, $x, $y);

// 清除图像处理库的设置
$this->image_lib->clear();

// 输出或保存处理后的图像
$this->image_lib->display();
// 或
$this->image_lib->save();