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我是 Zend Framework 的新手,我想使用正则表达式验证可选表单字段的用户输入。$start_date问题是我无法将此 Zend_Form_Element_Text 设置为不需要,因此只要该日期没有输入,我就无法将所有表单值发送到数据库。我试过->setAllowEmpty()->setRequired()

PHP 代码如下所示:

$start_date = new Zend_Form_Element_Text('start_date');
$start_date->setLabel('start_date')
    ->addFilter('StripTags')
    ->addFilter('StringTrim');
$start_date->setDecorators(array(
    'ViewHelper',
    'Errors',
    array(array('data' => 'HtmlTag'), array('tag' => 'td', 'class' => 'element'))
    ));
$start_date->addValidator('regex', false, array('/((\d{2})|(\d))\/((\d{2})|(\d))\/((\d{4})|(\d{2}))/'));
$start_date->setAttribs(array('class'=>'eingabe nospace', 'pattern'=>'((\d{2})|(\d))\/((\d{2})|(\d))\/((\d{4})|(\d{2}))', 'title'=>'Format: dd.mm.yyyy'));

谢谢!

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