PHP怎么实现数据自动校验 数据自动校验的3种实现方案

$email = "test@example.com";
if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "邮箱格式正确";
} else {
    echo "邮箱格式错误";
}

$age = "25";
if (is_numeric($age)) {
    echo "年龄是数字";
} else {
    echo "年龄不是数字";
}

require 'vendor/autoload.php';

use Respect\Validation\Validator as v;

try {
    v::email()->validate('test@example.com'); // true
    v::stringType()->length(1, null)->validate('foo'); // true
    v::intVal()->positive()->validate(123); // true
} catch(\Respect\Validation\Exceptions\NestedValidationException $e) {
    echo $e->getFullMessage();
}

class Validator {
    private $data;
    private $rules;
    private $errors = [];

    public function __construct($data, $rules) {
        $this->data = $data;
        $this->rules = $rules;
    }

    public function validate() {
        foreach ($this->rules as $field => $rule) {
            $rules = explode('|', $rule);
            foreach ($rules as $singleRule) {
                $this->applyRule($field, $singleRule);
            }
        }
        return empty($this->errors);
    }

    private function applyRule($field, $rule) {
        $value = $this->data[$field] ?? null;
        switch ($rule) {
            case 'required':
                if (empty($value)) {
                    $this->errors[$field][] = "$field 不能为空";
                }
                break;
            case 'email':
                if (!filter_var($value, FILTER_VALIDATE_EMAIL)) {
                    $this->errors[$field][] = "$field 格式不正确";
                }
                break;
            // 可以添加更多的验证规则
        }
    }

    public function getErrors() {
        return $this->errors;
    }
}

// 使用示例
$data = [
    'name' => 'John Doe',
    'email' => 'invalid-email',
];

$rules = [
    'name' => 'required',
    'email' => 'required|email',
];

$validator = new Validator($data, $rules);

if ($validator->validate()) {
    echo "数据校验通过";
} else {
    $errors = $validator->getErrors();
    print_r($errors);
}