我正在使用注册表单,我使用
PHP,在我的处理部分我运行一些代码,如果提交的项目失败,我然后将其添加到错误数组.
下面是一段代码,我正在找到最好的方法来确定是否应该触发错误.
所以如果在错误数组中设置了一个值,那么我需要重定向并做一些其他的东西.
我正在考虑使用isset或者is_array,但我不认为这是答案,因为我设置数组使用** $signup_errors = array()**这不会使is_array是真的吗？
任何人都可以建议一个很好的方式来做到这一点吗？
//at the beginning I set the error array $signup_errors = array(); // I then add items to the error array as needed like this... $signup_errors['captcha'] = 'Please Enter the Correct Security Code';
if ($signup_errors) {
// there was an error
} else {
// there wasn't
}
它是如何工作的？当转换为布尔值时,空数组将转换为false.每个其他数组转换为true.从PHP manual：
Converting to boolean
To explicitly convert a value to
boolean,use the (bool) or (boolean)
casts. However,in most cases the cast
is unncecessary,since a value will be
automatically converted if an
operator,function or control
structure requires a boolean argument.See also Type Juggling.
When converting to boolean,the
following values are considered FALSE:
- the boolean FALSE itself
- the integer 0 (zero)
- the float 0.0 (zero)
- the empty string,and the string “0”
- an array with zero elements
- an object with zero member variables (PHP 4 only)
- the special type NULL (including unset variables)
- SimpleXML objects created from empty tags
- Every other value is considered TRUE (including any resource).
您也可以使用empty(),因为它具有类似的语义.
