php - Laravel preg_match() : Unknown modifier ']'

Question

我在 Laravel 4.2 上工作。我尝试使用验证器通过正则表达式验证名称字段，这是我的以下规则:

public static $rules_save = [
    'name'      => 'required|regex:/[XI0-9/]+/|unique:classes'
];

但是，一旦我调用要验证的规则，就会引发错误，请参见下文:

preg_match(): Unknown modifier ']'

在以下位置:

protected function validateRegex($attribute, $value, $parameters)
    {
        $this->requireParameterCount(1, $parameters, 'regex');

        return preg_match($parameters[0], $value); // **ON THIS LINE**
    }

Answer 1

由于您需要将 / 包含到字符类中，因此您需要转义它:

'name'      => 'required|regex:/[XI0-9\/]+/|unique:classes'
                                      ^

或使用其他regex delimiters .

When using the PCRE functions, it is required that the pattern is enclosed by delimiters. A delimiter can be any non-alphanumeric, non-backslash, non-whitespace character.

Often used delimiters are forward slashes (/), hash signs (#) and tildes (~).