在PHP中，如何在if语句的if中执行if语句？

时间：2016-10-10 19:33:23

标签： php if-statement

所以我知道问题很混乱。这就是我想知道该怎么做。

我有以下if语句：

if(
    (isset($_POST['billing_company']) && $_POST['billing_company'] != "") && 
    (isset($_POST['billing_address']) && $_POST['billing_address'] != "") && 
    (isset($_POST['billing_city']) && $_POST['billing_city'] != "") && 
    (isset($_POST['billing_state']) && $_POST['billing_state'] != "") && 
    (isset($_POST['billing_zip']) && $_POST['billing_zip'] != "") && 
    (isset($_POST['billing_phone']) && $_POST['billing_phone'] != "") && 
    (isset($_POST['location_name']) && $_POST['location_name'] != "") && 
    (isset($_POST['location_address']) && $_POST['location_address'] != "") && 
    (isset($_POST['location_city']) && $_POST['location_city'] != "") && 
    (isset($_POST['location_state']) && $_POST['location_state'] != "") && 
    (isset($_POST['location_zip']) && $_POST['location_zip'] != "") && 
    (isset($_POST['location_phone']) && $_POST['location_phone'] != "") && 
    (isset($_POST['user_firstname']) && $_POST['user_firstname'] != "") && 
    (isset($_POST['user_lastname']) && $_POST['user_lastname'] != "") && 
    (isset($_POST['user_username']) && $_POST['user_username'] != "") && 
    (isset($_POST['user_email']) && $_POST['user_email'] != "") && 
    (isset($_POST['user_password']) && $_POST['user_password'] != "") && 
    (isset($_POST['user_mobile']) && $_POST['user_mobile'] != "") && 
    (isset($_POST['payment_cc_name']) && $_POST['payment_cc_name'] != "") && 
    (isset($_POST['payment_cc_number']) && $_POST['payment_cc_number'] != "") && 
    (isset($_POST['payment_cc_expo_month']) && $_POST['payment_cc_expo_month'] != "") && 
    (isset($_POST['payment_cc_expo_year']) && $_POST['payment_cc_expo_year'] != "") && 
    (isset($_POST['payment_cc_code']) && $_POST['payment_cc_code'] != "") && 
    (isset($_POST['terms']) && $_POST['terms'] != "")
){

但是，基于某些变量，我可能不再需要任何结算信息。所以我想知道我是否可以在IF中做一个IF，所以像这样：

if(
    ($billingRequired == 1){
        (isset($_POST['billing_company']) && $_POST['billing_company'] != "") && 
        (isset($_POST['billing_address']) && $_POST['billing_address'] != "") && 
        (isset($_POST['billing_city']) && $_POST['billing_city'] != "") && 
        (isset($_POST['billing_state']) && $_POST['billing_state'] != "") && 
        (isset($_POST['billing_zip']) && $_POST['billing_zip'] != "") && 
        (isset($_POST['billing_phone']) && $_POST['billing_phone'] != "") && 
    }
    (isset($_POST['location_name']) && $_POST['location_name'] != "") && 
    (isset($_POST['location_address']) && $_POST['location_address'] != "") && 
    (isset($_POST['location_city']) && $_POST['location_city'] != "") && 
    (isset($_POST['location_state']) && $_POST['location_state'] != "") && 
    (isset($_POST['location_zip']) && $_POST['location_zip'] != "") && 
    (isset($_POST['location_phone']) && $_POST['location_phone'] != "") && 
    (isset($_POST['user_firstname']) && $_POST['user_firstname'] != "") && 
    (isset($_POST['user_lastname']) && $_POST['user_lastname'] != "") && 
    (isset($_POST['user_username']) && $_POST['user_username'] != "") && 
    (isset($_POST['user_email']) && $_POST['user_email'] != "") && 
    (isset($_POST['user_password']) && $_POST['user_password'] != "") && 
    (isset($_POST['user_mobile']) && $_POST['user_mobile'] != "") && 
    (isset($_POST['payment_cc_name']) && $_POST['payment_cc_name'] != "") && 
    (isset($_POST['payment_cc_number']) && $_POST['payment_cc_number'] != "") && 
    (isset($_POST['payment_cc_expo_month']) && $_POST['payment_cc_expo_month'] != "") && 
    (isset($_POST['payment_cc_expo_year']) && $_POST['payment_cc_expo_year'] != "") && 
    (isset($_POST['payment_cc_code']) && $_POST['payment_cc_code'] != "") && 
    (isset($_POST['terms']) && $_POST['terms'] != "")
){

我很确定没有，但想与比我更聪明的人检查。我知道我可以在{}旁边做一些嵌套但是不想在非常深的巢中检查每个变量。

谢谢，

3 个答案:

答案 0 :(得分：3)

只需在要组合的部分周围添加（），它就会解析为可以包含在if语句中的简单布尔值

此处的逻辑显示＆＃34;如果（不需要结算或结算字段全部填写完毕）并填写所有非结算字段，则...＆＃34; 

if(
    (($billingRequired != 1) || (
        (isset($_POST['billing_company']) && $_POST['billing_company'] != "") && 
        (isset($_POST['billing_address']) && $_POST['billing_address'] != "") && 
        (isset($_POST['billing_city']) && $_POST['billing_city'] != "") && 
        (isset($_POST['billing_state']) && $_POST['billing_state'] != "") && 
        (isset($_POST['billing_zip']) && $_POST['billing_zip'] != "") && 
        (isset($_POST['billing_phone']) && $_POST['billing_phone'] != "")
    ))
    &&
    (
        (isset($_POST['location_name']) && $_POST['location_name'] != "") && 
        (isset($_POST['location_address']) && $_POST['location_address'] != "") && 
        (isset($_POST['location_city']) && $_POST['location_city'] != "") && 
        (isset($_POST['location_state']) && $_POST['location_state'] != "") && 
        (isset($_POST['location_zip']) && $_POST['location_zip'] != "") && 
        (isset($_POST['location_phone']) && $_POST['location_phone'] != "") && 
        (isset($_POST['user_firstname']) && $_POST['user_firstname'] != "") && 
        (isset($_POST['user_lastname']) && $_POST['user_lastname'] != "") && 
        (isset($_POST['user_username']) && $_POST['user_username'] != "") && 
        (isset($_POST['user_email']) && $_POST['user_email'] != "") && 
        (isset($_POST['user_password']) && $_POST['user_password'] != "") && 
        (isset($_POST['user_mobile']) && $_POST['user_mobile'] != "") && 
        (isset($_POST['payment_cc_name']) && $_POST['payment_cc_name'] != "") && 
        (isset($_POST['payment_cc_number']) && $_POST['payment_cc_number'] != "") && 
        (isset($_POST['payment_cc_expo_month']) && $_POST['payment_cc_expo_month'] != "") && 
        (isset($_POST['payment_cc_expo_year']) && $_POST['payment_cc_expo_year'] != "") && 
        (isset($_POST['payment_cc_code']) && $_POST['payment_cc_code'] != "") && 
        (isset($_POST['terms']) && $_POST['terms'] != "")
    )
{
    //statements
}

虽然我怀疑这可以在一个循环中做得更好，也许是个人偏好，但我会更喜欢这样的事情

$billingRequiredFields = array('billing_company','billing_address','billing_city','billing_state','billing_zip','billing_phone','location_name','location_address','location_city','location_state','location_zip','location_phone','user_firstname','user_lastname','user_username','user_email','user_password','user_mobile','payment_cc_name','payment_cc_number','payment_cc_expo_month','payment_cc_expo_year','payment_cc_code','terms');
$billingNotRequiredFields = array('location_name','location_address','location_city','location_state','location_zip','location_phone','user_firstname','user_lastname','user_username','user_email','user_password','user_mobile','payment_cc_name','payment_cc_number','payment_cc_expo_month','payment_cc_expo_year','payment_cc_code','terms')
$requiredFields = ($billingRequired == 1) ? $billingRequiredFields : $billingNotRequiredFields;
$continue = true;
foreach($requiredFields as $field) {
    if (!isset($_POST[$field]) || $_POST[$field] == '') {
        $continue = false;
        break;
    }
}

if ($continue) {
    // statements
}

答案 1 :(得分：2)

更好的是，不要在主要条件中放置这么多测试，只需要做一个函数来测试它，然后测试=== true或=== false 

function validate_input($billingRequired=0){
    $b_valid = true;
    if( $billingRequired == 1 ){
         if (!isset($_POST['billing_company']) || $_POST['billing_company'] == ""){
            $b_valid = false;
         }
         elseif (!isset($_POST['billing_address']) || $_POST['billing_address'] == ""){
            $b_valid = false;
         }
         elseif (!isset($_POST['billing_city']) || $_POST['billing_city'] == ""){
            $b_valid = false;
         }
         elseif (!isset($_POST['billing_state']) || $_POST['billing_state'] == ""){
            $b_valid = false;
         }
         elseif (!isset($_POST['billing_zip']) || $_POST['billing_zip'] == ""){
            $b_valid = false;
         }
         elseif (!isset($_POST['billing_phone']) || $_POST['billing_phone'] == ""){
            $b_valid = false;
         }
    }
    if (!isset($_POST['location_name']) || $_POST['location_name'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['location_address']) || $_POST['location_address'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['location_city']) || $_POST['location_city'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['location_state']) || $_POST['location_state'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['location_zip']) || $_POST['location_zip'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['location_phone']) || $_POST['location_phone'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['user_firstname']) || $_POST['user_firstname'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['user_lastname']) || $_POST['user_lastname'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['user_username']) || $_POST['user_username'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['user_email']) || $_POST['user_email'] != "") == ""){
        $b_valid = false;
    }
    elseif  (!isset($_POST['user_password']) || $_POST['user_password'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['user_mobile']) || $_POST['user_mobile'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['payment_cc_name']) || $_POST['payment_cc_name'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['payment_cc_number']) || $_POST['payment_cc_number'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['payment_cc_expo_month']) || $_POST['payment_cc_expo_month'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['payment_cc_expo_year']) || $_POST['payment_cc_expo_year'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['payment_cc_code']) || $_POST['payment_cc_code'] == ""){
        $b_valid = false;
    }
    elseif (!isset($_POST['terms']) || $_POST['terms'] == "")
        $b_valid = false;
    }
    return $b_valid;
}

现在很容易修改/阅读等等。因为空洞可能有点模棱两可，我发现自己一般都会避开它，尽管它风格优雅。

为了使这更清洁，我可能会这样写：

function validate_input($billingRequired=0){
    $b_valid = true;
    $a_billing = array('billing_company','billing_address'...);
    $a_main = array('billing_address','location_address'...);
    if( $billingRequired == 1 ){
         $a_main = array_merge($a_billing,$a_main);
    }
    foreach ($a_main as $test){
       if (!isset($_POST[$test]) || trim($_POST[$test]) == "")
            $b_valid = false;
            break;
        }
    }
    return $b_valid;
}

假设空值为“”，这通常不是选择列表等的情况。

答案 2 :(得分：2)

我要做的是在脚本顶部创建一个数组，其中包含所需的所有POST变量的列表，然后我将循环遍历它们。你的代码会更小。而且几乎同样简洁...... 

//We NEED these fields for the script to work...
$requiredFields = array(
    "fname",
    "lname",
    "phone",
    "accredited",
    "etc, etc"
);

//IF you require billing, 
if($billingRequired){
    // Define the billing fields that we expect to be POSTed...
    $billingFields  = array(
        "billing_compnay",
        "billing_address",
        "etc, etc"
    );
    // Add the billing fields to the required fields
    $requiredFields = array_merge($requiredFields, $billingFileds);
}

// Loop through required fields and check to see if they are all POSTed
foreach($requiredFields as $fieldName){
    // IF a required field is not set...
    if(empty($_POST[$fieldName])){
        // Do stuff, call a function, show an error, etc.
        break; // Or redirect, or exit after a JSON response, whatever. Just be sure to end the loop here for efficiency.
    }
}
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