PHP-Zend MultiCheckbox：设置最大选择

在这里,我再次提出一个简单的问题.

是否有一个现有的zend验证器来为用户可以选择的框设置最大值.
我希望他们选择不超过3个框.

我已经在网上搜索过,唯一发现的是在form元素的isValid函数中设置了一个错误.但是然后我有一个问题,错误显示每个选定的框. (这样4次或更多次)或者也许有人知道如何处理此问题？如果我只能显示一次此错误,那么我的问题也将得到解决.

感谢您的帮助.

解决方法:

您可以使用我的验证器,它根据值的数量进行检查.我完全出于相同的目的-验证multiselect中选定值的最大和最小数目：

<?php
class App_Validate_ValuesNumber extends Zend_Validate_Abstract
{
    const TOO_LESS = 'tooLess';
    const TOO_MUCH = 'tooMuch';

    protected $_type = null;
    protected $_val = null;

    /**
     * @var array
     */
    protected $_messageTemplates = array(
        self::TOO_LESS => "At least %num% values required",
        self::TOO_MUCH => "Not more then %num%  required",
    );

    /**
     * @var array
     */
    protected $_messageVariables = array(
        'num' => '_val'
    );
    /**
     * Constructor for the integer validator
     *
     * @param string $type Comparison type, that should be used
     *                     TOO_LESS means that value should be greater then items number
     *                     TOO_MUCH means opposite
     * @param int    $val  Value to compare items number with
     */
    public function __construct($type, $val)
    {
        $this->_type = $type;
        $this->_val = $val;
    }

    /**
     * Defined by Zend_Validate_Interface
     *
     * Returns true if and only if $value is a valid integer
     *
     * @param  string|integer $value
     * @return boolean
     */
    public function isValid($value)
    {
        // Value shoul dbe greated
        if ($this->_type == self::TOO_LESS) {
            if (count($value) < $this->_val) {
                $this->_error(self::TOO_LESS);
                return false;
            }
        }

        // Value should be less
        if ($this->_type == self::TOO_MUCH) {
            if (count($value) > $this->_val) {
                $this->_error(self::TOO_MUCH);
                return false;
            }
        }
        return true;
    }
}

标签：zend-form-element,zend-form,zend-validate,zend-framework,php
来源： https://codeday.me/bug/20191102/1988240.html