数组内的php条件

在下面的代码中，当{VarName}为空（空白或null）时，我需要能够设置不同的where条件

数组定义中是否可能有if条件？或者，我可以在sql查询中进行验证吗

$col["editoptions"] = array(
             "value"=>$str, 
             "onchange" => array(
              array(
              "sql"=> "select distinct place as k, place as v from mytable                                       
                      WHERE Name = '{VarName}' 
                      AND Area = '{VarArea}'
                      ORDER BY place",
              "update_field" => "Localidade" )));

---

可以在数组定义中使用三元，如下所示：

条件？值（如果为真）：值（如果为假）

e、 g

1==1？“是：'否'；//计算结果为“是”

因此，在你的情况下：

$col["editoptions"] = array(
    "value"=>$str, 
    "onchange" => array(
        array(
            "sql"=> empty($VarName) ?
                "YOUR ALTERNATIVE SQL HERE" : 
                "select distinct place as k, place as v from mytable                                       
                      WHERE Name = '{VarName}' 
                      AND Area = '{VarArea}'
                      ORDER BY place",
              "update_field" => "Localidade"
        )
    )
);

要使数组定义更整洁，应考虑将SQL放入变量中，并在数组定义中引用该变量：

$sql = empty($VarName) ?
    "YOUR ALTERNATIVE SQL HERE" : 
    "select distinct place as k, place as v from mytable                                       
        WHERE Name = '{VarName}' 
        AND Area = '{VarArea}'
        ORDER BY place";
$col["editoptions"] = array(
    "value"=>$str, 
    "onchange" => array(
        array(
            "sql" => $sql,
            "update_field" => "Localidade"
        )
    )
);

---

就像@Matt所说的，你可以像下面这样在数组内部构建

$VarName1 = null;

$col["editoptions"] = array(
    "value"=> 'value', 
    "onchange" => array(
     array(
     "sql"=> "select distinct place as k, place as v from mytable                                       
             WHERE Name = " . ( $VarName1 ? "'{VarName1}'" : "'{VarName2}'" ) .     
             "AND Area = '{VarArea}'
             ORDER BY place",
     "update_field" => "Localidade" )));

为了便于维护，最好使用另一个变量（如下面所示）中的条件以字符串形式生成sql

$sql = "select distinct place as k, place as v from mytable                                      
WHERE Name = ";
if( $VarName1 ){
    $sql .= "'{VarName1}'";
}
else{
    $sql .= "'{VarName2}'";
}
$sql .=   "AND Area = '{VarArea}' ORDER BY place";