Question

我的PHP中的if和else语句存在问题，它从不运行else语句。

输入表单是HTML格式：

   <input type="radio" name="marital_stat" id="single" value="single" />Single
   <input type="radio" name="marital_stat" id="married" value="married" />Married

   <input name="age" type="text" size="5" maxlength="3" placeholder="30" required/>

   <input name="work" type="radio" id="employee" value="employee" />Employee
   <input name="work" type="radio" id="own" value="own" />
    Own Business 
   <input name="work" type="radio" id="jobless" value="jobless" />Jobless

   <input name="place" type="radio" id="urban" value="urban" />Urban
   <input name="place" type="radio" id="rural" value="rural" />Rural</td>

这是PHP代码：

if ($marital_stat == 'married')
{
    if ($age >= 18 || $age < 59)
    { 
        if ($work == 'jobless')
        { 
            if ($place == 'rural') { $loan_credibility == 5; }
        }
    }
}
else if ($marital_stat == 'single')
{ 
    if ($age >= 18 || $age < 59)
    {
        if ($work == 'employee')
        { 
            if ($place == 'rural') { $loan_credibility == 1; }
        }
    }
}

这是一个显示一些输出的条件：

$A = 'positive';
$B = 'negative';

if ($loan_credibility == 5 ){
    echo $B ;}
else{
    echo $A;
}

Answer 1

我看到你做$loan_credibility == 5;或1; ==仅在等式语句中使用它检查双方是否相等，您必须使用=来设置值，而不是==所以它将是$loan_credibility = 5;或{ {1}};

Answer 2

您没有else子句（使用else if时在逻辑上是必要的）...

if (condition) {
    code to be executed if condition is true;
} elseif (condition) {
    code to be executed if condition is true;
} else {
    code to be executed if condition is false;
}

执行以下任何操作（＃1或＃2最有意义）......

将else if变为单独的if块
将else if更改为else
或添加else子句

此外，正如@Mohamed Belal所指出的，设置变量时使用=而不是==。

解决问题的两件事：1）if-else if-else逻辑和2）= vs == ......

if ($marital_stat == 'married')
{
    if ($age >= 18 || $age < 59)
    { 
        if ($work == 'jobless')
        { 
            if ($place == 'rural') { $loan_credibility = 5; }
        }
    }
}

if ($marital_stat == 'single')
{ 
    if ($age >= 18 || $age < 59)
    {
        if ($work == 'employee')
        { 
            if ($place == 'rural') { $loan_credibility = 1; }
        }
    }
}

if else语句为什么不运行else语句？

2 个答案: