php上传图片裁剪

<?php
// 检查是否有文件上传
if (isset($_FILES['image'])) {
    $file = $_FILES['image'];
    $image = imagecreatefromstring(file_get_contents($file['tmp_name']));

    // 设置裁剪区域
    $width = imagesx($image);
    $height = imagesy($image);
    $cropWidth = 200;
    $cropHeight = 200;
    $x = ($width - $cropWidth) / 2;
    $y = ($height - $cropHeight) / 2;

    // 创建新的图像资源
    $newImage = imagecreatetruecolor($cropWidth, $cropHeight);

    // 裁剪图片
    imagecopyresampled($newImage, $image, 0, 0, $x, $y, $cropWidth, $cropHeight, $cropWidth, $cropHeight);

    // 保存裁剪后的图片
    imagejpeg($newImage, 'cropped_image.jpg', 90);

    // 释放内存
    imagedestroy($image);
    imagedestroy($newImage);

    echo "图片裁剪成功！";
} else {
    echo "没有文件上传！";
}
?>