doudi5291 2013-01-15 20:48
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PHP从MySQL查询切换页面

I have the following PHP code:

//switch
if (isset($_GET['pg']))
    $pg = $_GET['pg'];

else{
    $pg = 'home';
    }

switch ($pg){
    case 'home':
        if (file_exists("pages/home.php")){
            include("pages/home.php");}
        break;

    case 'about':
        if (file_exists("pages/about.php")){
            include("pages/about.php");}
        else{include_once("error.php");}
        break;

    case 'products':
        if (file_exists("pages/products.php")){
            include("pages/products.php");}
        else{include_once("error.php");}
        break;

    case 'contact':
        if (file_exists("pages/contact.php")){
            include("pages/contact.php");}
        else{include_once("error.php");}
        break;


    default:
        if (file_exists("error.php")){
        include("error.php");}
}
?>

How can I do this switch by a MySQL query? I tried something like this, but unfortunately doesn't work:

$SQLquery = "SELECT * FROM pages";
$result = mysql_query($SQLquery);

switch ($pg){
while($row = mysql_fetch_array($result)) {
    case $row['id']:
        include($row['id'].'.php');
        break;
}
}
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1条回答 默认 最新

  • dongshao1156 2013-01-15 21:01
    关注

    AFAIK, you cannot dynamically define switch statements at runtime. These control structures are parsed before the code is run and can't be altered later (correct me if I'm wrong).

    I'd try something along the lines of this:

    while($row = mysql_fetch_array($result)) {
        if($row['id'] == $pg){
            include($row['id'].'.php');
            break;
        }
    }
    


    EDIT: On second thought, the solution @Marc M posted as a comment on the question is way better. Do this:

    $SQLquery = "SELECT * FROM pages WHERE id='" . $pg ."';";
    $result = mysql_query($SQLquery);
    
    if($row = mysql_fetch_array($result))
        include($row['id'].'.php');
    else
        include("error.php");
    

    And since you hopefully have declared the MySQL column id as UNIQUE, you either get exaclty one row or your "error.php" file will be included.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

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