CakePHP：访问其他模型app_model.php中的模型以验证银行号码

使用CakePHP验证银行号码的方法

php
class BankAccount extends AppModel {
    public $validate = array(
        'account_number' => array(
            'rule' => 'validateBankAccount',
            'message' => '请输入有效的银行账户号码'
        )
    );
    public function validateBankAccount($check) {
        $accountNumber = array_values($check)[0];
        // 验证逻辑
        // 在这里编写验证银行号码的代码
        return true; // 验证通过
    }
}

php
class BankAccountsController extends AppController {
    public function add() {
        if ($this->request->is('post')) {
            $this->BankAccount->set($this->request->data);
            if ($this->BankAccount->validates()) {
                // 验证通过，保存数据
                $this->BankAccount->save($this->request->data);
                $this->Flash->success('银行账户已成功添加！');
                $this->redirect(array('action' => 'index'));
            } else {
                // 验证失败，显示错误信息
                $this->Flash->error('请修正以下错误：' . implode(', ', $this->BankAccount->validationErrors['account_number']));
            }
        }
    }
}

php
public function validateBankAccount($check) {
    $accountNumber = array_values($check)[0];
    // 移除非数字字符
    $accountNumber = preg_replace('/[^0-9]+/', '', $accountNumber);
    // Luhn算法验证
    $sum = 0;
    $odd = strlen($accountNumber) % 2;
    for ($i = 0; $i < strlen($accountNumber); $i++) {
        $digit = $accountNumber[$i];
        if ($i % 2 == $odd) {
            $digit *= 2;
            if ($digit > 9) {
                $digit -= 9;
            }
        }
        $sum += $digit;
    }
    return $sum % 10 == 0;
}