Question

我正在努力通过David Powers OO Solutions并需要帮助理解他的Pos_Validator类中的一种方法。

方法名称暗示它处理数组但是，第一个参数需要单个字段名称？其余的args是可选的。我在这里错过了什么？

/**
 * Sanitizes array by removing completely all tags (including PHP and HTML).
 * 
 * The second and third optional arguments determine whether the ampersand
 * and quotes are converted to numerical entitites. By default, ampersands are
 * not converted, but both double and single quotes are replaced by numerical
 * entities.
 * 
 * Arguments four to seven determine whether characters with an ASCII value less than 32 or
 * greater than 127 are encoded or stripped. By default, they are left untouched.  
 * 
 * @param string  $fieldName       Name of submitted value to be checked.
 * @param boolean $encodeAmp       Optional; converts & to &#38; if set to true; defaults to false.
 * @param boolean $preserveQuotes  Optional; preserves double and single quotes if true; defaults to false.
 * @param boolean $encodeLow       Optional; converts ASCII values below 32 to entities; defaults to false.
 * @param boolean $encodeHigh      Optional; converts ASCII values above 127 to entities; defaults to false.
 * @param boolean $stripLow        Optional; strips ASCII values below 32; defaults to false.
 * @param boolean $stripHigh       Optional; strips ASCII values above 127; defaults to false.
 */
public function removeTagsFromArray($fieldName, $encodeAmp = false, $preserveQuotes = false, $encodeLow = false, $encodeHigh = false, $stripLow = false, $stripHigh = false)
{
    // Check that another validation test has not been applied to the same input
    $this->checkDuplicateFilter($fieldName);
    // Set the filter options 
    $this->_filterArgs[$fieldName]['filter'] = FILTER_SANITIZE_STRING;
    // Multiple flags are set using the "binary or" operator
    $this->_filterArgs[$fieldName]['flags'] = FILTER_REQUIRE_ARRAY;
    if ($encodeAmp) {
        $this->_filterArgs[$fieldName]['flags'] |= FILTER_FLAG_ENCODE_AMP;
    }
    if ($preserveQuotes) {
        $this->_filterArgs[$fieldName]['flags'] |= FILTER_FLAG_NO_ENCODE_QUOTES;
    }
    if ($encodeLow) {
        $this->_filterArgs[$fieldName]['flags'] |= FILTER_FLAG_ENCODE_LOW;
    }
    if ($encodeHigh) {
        $this->_filterArgs[$fieldName]['flags'] |= FILTER_FLAG_ENCODE_HIGH;
    }
    if ($stripLow) {
        $this->_filterArgs[$fieldName]['flags'] |= FILTER_FLAG_STRIP_LOW;
    }
    if ($stripHigh) {
        $this->_filterArgs[$fieldName]['flags'] |= FILTER_FLAG_STRIP_HIGH;
    }
}

Answer 1

自从我写这本书以来已经很久了，所以我记不起当时的一切。但Pos_Validator类的特定方法按预期工作。

第一个参数是输入字段的名称。与ID必须唯一的ID不同，name属性可用于多个输入字段。要将多个字段作为数组提交到PHP脚本，请在name属性的末尾添加一对方括号。例如，以下代码将两个地址字段作为数组提交：

<p><label for="address1">Address 1:</label>
    <input name="address[]" type="text" id="address1">
</p>
<p><label for="address2">Address 2:</label>
    <input name="address[]" type="text" id="address2" />
</p>

如果您将Pos_Validator的实例创建为$ val，则可以通过调用removeTagsFromArray（）方法从地址字段中删除标记：

$val->removeTagsFromArray('address');

这是最可能出现的情况吗？可能不是。该类的目的是演示如何使用Facade设计模式来隐藏PHP过滤器函数的复杂性。 Pos_Validator类的其他方法更实用。

需要帮助了解removeTagsFromArray（David Powers）

1 个答案: