-2

我的打印阵列不工作。它在添加到数组之前回显 $articleID，因此变量不为空或任何东西。

然后我 print_r($magIDArray) 它只是回显'Array()'; 任何人都可以帮忙吗？

编辑：我已经调用了该函数，否则它不会回显函数中的变量 - 它不会回显 $articleID，但它已经完成了

$sql = mysql_query("SELECT * FROM master_k2_categories WHERE parent = '$catid' ORDER 
BY id DESC");
while($row = mysql_fetch_array($sql)){
    $id = $row["id"];
    $name = $row["name"];
    getMagArticleID($id); 
}

$magIDArray = array();
function getMagArticleID($id){
    $magID = $id;
    $sqlID = mysql_query("SELECT * FROM master_k2_items WHERE catid = '$magID' ORDER BY id DESC");
    while($row = mysql_fetch_array($sqlID)){
        $articleID = $row["id"];
        echo '<br>', $articleID;
        $magIDArray[] = $articleID;
    }
}
print_r($magIDArray);
4

6 回答 6

1

您需要使用global关键字：

   $magIDArray = array();
    function getMagArticleID($id){
    global $magIDArray ;
    $magID = $id;
        $sqlID = mysql_query("SELECT * FROM master_k2_items WHERE catid = '$magID' ORDER BY id DESC");
        while($row = mysql_fetch_array($sqlID)){
            $articleID = $row["id"];
            echo '<br>', $articleID;
            $magIDArray[] = $articleID;
        }
    }
    getMagArticleID($id);
    print_r($magIDArray);

看看变量范围： http: //php.net/manual/en/language.variables.scope.php

于 2013-10-03T10:37:40.307 回答
1

您需要在尝试和回显值之前运行您的函数

编辑：正如撤消所说- 您还必须使用全局变量或在函数中返回一个值

于 2013-10-03T10:37:51.340 回答
1

你错过了两件事：

1）忘记调用函数。

2) 忘记返回函数值。

更新代码：

<?php    
function getMagArticleID($id){
 $magIDArray = array();
    $magID = $id;
    $sqlID = mysql_query("SELECT * FROM master_k2_items WHERE catid = '$magID' ORDER BY id DESC");
    while($row = mysql_fetch_array($sqlID)){
        $articleID = $row["id"];
        echo '<br>', $articleID;
        $magIDArray[] = $articleID;
    }
        return $magIDArray;
}

$magIDArray = getMagArticleID($id);
print_r($magIDArray);
于 2013-10-03T10:37:59.713 回答
0

尝试这个：

$magIDArray = array();
function getMagArticleID($id){
    global $magIDArray;
    $magID = $id;
    $sqlID = mysql_query("SELECT * FROM master_k2_items WHERE catid = '$magID' ORDER BY id DESC");
    while($row = mysql_fetch_array($sqlID)){
        $articleID = $row["id"];
        echo '<br>', $articleID;
        $magIDArray[] = $articleID;
    }
    return $magIDArray;
}
getMagArticleID(*parameter*);
print_r($magIDArray);
于 2013-10-03T10:39:53.107 回答
0

您的数组在函数范围内被“填充”，因此它的值在全局范围内不可用。

您可以全球化 var：

function getMagArticleID($id){
    global  $magIDArray;
    $magID = $id;
    $sqlID = mysql_query("SELECT * FROM master_k2_items WHERE catid = '$magID' ORDER BY id DESC");
    while($row = mysql_fetch_array($sqlID)){
        $articleID = $row["id"];
        echo '<br>', $articleID;
        $magIDArray[] = $articleID;
    }
}

或者您可以将数组作为函数的结果返回

function getMagArticleID($id){
    $magIDArray=Array();
    $magID = $id;
    $sqlID = mysql_query("SELECT * FROM master_k2_items WHERE catid = '$magID' ORDER BY id DESC");
    while($row = mysql_fetch_array($sqlID)){
        $articleID = $row["id"];
        echo '<br>', $articleID;
        $magIDArray[] = $articleID;
    }
    return $magIDArray;
}
$magIDArray=getMagArticleID($id);

也就是说，在其他替代方法中，例如通过引用传递数组或将其全部包装在 $madIDArray 是私有类 var 的类中，或者将 $madIDArray 声明为对象并让 PDO 获取绑定到对象的结果。但我相信你会使用最简单的解决方案。

于 2013-10-03T10:40:35.410 回答
0

您需要先调用该函数，因此我将执行以下操作：

$magIDArray = array();
function getMagArticleID($id){
    $magID = $id;
    $sqlID = mysql_query("SELECT * FROM master_k2_items WHERE catid = '$magID' ORDER BY id DESC");
    while($row = mysql_fetch_array($sqlID)){
        $articleID = $row["id"];
        echo '<br>', $articleID;
        $magIDArray[] = $articleID;
    }

    return $magIDArray;

}
$magIDfunction = getMagArticleID($id);
print_r($magIDfunction);

（未经测试）

于 2013-10-03T10:38:10.427 回答