數組內的php條件

Question

在下面的代碼中，當 {VarName} 為空（空白或空）時，我需要能夠設置不同的 where 條件。

數組定義中是否可以有 if 條件？ 或者，我可以在 sql 查詢中進行驗證嗎？

$col["editoptions"] = array(
             "value"=>$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" )));

Answer 1

您可以在數組定義中使用三元，如下所示：

condition ? value-if-true : value-if-false

例如，

1 == 1 ? 'yes' : 'no'; // evaluates to 'yes'

所以在你的情況下：

$col["editoptions"] = array(
    "value"=>$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"
        )
    )
);

為了使您的數組定義更整潔，您應該考慮將您的 SQL 放在一個變量中並在數組 def 中引用該變量：

$sql = empty($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"
        )
    )
);

Answer 2

就像@Matt 說的，你可以像下面這樣構建內部數組。

$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" )));

如果您使用另一個變量中的條件在字符串中生成 sql 會更好，如下所示以便於維護。

$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";