php - MySQL 结果不想排序

Question

所以我从加载了这个函数的 MySQL 数据库中得到了结果。

function cpus($made, $model, $freq, $cores, $socket, $class, $order, $ad){


$made=="" ? $made = "IS NOT NULL" : $made = "LIKE '%".$made."%'";
$model=="" ? $model = "IS NOT NULL" : $model = "LIKE '%".$model."%'";
$freq == "" ? $freq = "IS NOT NULL" : $freq = "=".$freq;
$cores == "" ? $cores = "IS NOT NULL" : $cores = "=".$cores;
$socket == "" ? $socket = "IS NOT NULL" : $socket = "LIKE '%".$socket."%'";
$class ==  "" ? $class = "IS NOT NULL" : $class = "LIKE '%".$class."%'";
$order == "" ? $order = "ORDER BY 'released'" : $order = "ORDER BY '".$order."'";
$ad == "a" ? $order .= " ASC" : $order .= " DESC";

$sql = "SELECT * FROM `cpus` 
        WHERE `made` ".$made." 
        AND `model` ".$model." 
        AND `freq` ".$freq." 
        AND `cores` ".$cores." 
        AND `socket` ".$socket." 
        AND `class` ".$class." 
        ".$order;

$q = mysql_query($sql) or die(mysql_error());


while ($r = mysql_fetch_assoc($q)) {
    $mod = $r["model"];
    $mad = $r["made"];
    $fre = $r["freq"];
    $cor = $r["cores"];
    $soc = $r["socket"];
    $cla = $r["class"];
    $phpdate = strtotime( $r["released"] );
    $dat = date( 'F Y', $phpdate );

    echo '<div class="row">';
    echo '
            <p class="model cpufield">'.linkS("cpus", $mod, cpu_id($mod)).'</p>
            <p class="made cpufield">'.linkD("cpus", $mad).'</p>
            <p class="freq cpufield">'.$fre.' GHz</p>
            <p class="cores cpufield">'.$cor.' cores</p>
            <p class="socket cpufield">'.$soc.'</p>
            <p class="class cpufield">'.$cla.'</p>
            <p class="released cpufield last">'.$dat.'</p>
            ';
    echo '</div>';
}
if(mysql_num_rows($q) == 0){
    echo '<p class="alert">';
    echo "No results!";
    echo '</p>';
}
}

我在 phpmyadmin 中运行此函数生成的每个 sql 查询，并且每一个都有效。但是如果我在页面上运行它，它将一直工作直到它从数据库中获取订购结果。它没有显示任何错误，但是当我为订购设置变量时它不起作用。

这是一个 html 部分:

    <div class="table-header">
        <p class="model cpufield"><a href="<?php echo cpu_order(url(),$order,$ad, 'model'); ?>" class="intext">Model</a></p>
        <p class="made cpufield"><a href="<?php echo cpu_order(url(),$order,$ad, 'made'); ?>" class="intext">Manufacturer</a></p>
        <p class="freq cpufield"><a href="<?php echo cpu_order(url(),$order,$ad, 'freq'); ?>" class="intext">Clock</a></p>
        <p class="cores cpufield"><a href="<?php echo cpu_order(url(),$order,$ad, 'cores'); ?>" class="intext">Cores</a></p>
        <p class="socket cpufield"><a href="<?php echo cpu_order(url(),$order,$ad, 'socket'); ?>" class="intext">Socket</a></p>
        <p class="class cpufield"><a href="<?php echo cpu_order(url(),$order,$ad, 'class'); ?>" class="intext">Class</a></p>
        <p class="released cpufield last"><a href="<?php echo cpu_order(url(),$order,$ad, 'released'); ?>" class="intext">Released</a></p>
    </div>
    <div class="table-content">
        <?php cpus($made, $model, $freq, $cores, $socket, $class, $order, $ad); ?>
    </div>

cpu_order是在address中添加/替换顺序变量order和变量ad的函数。

Answer 1

您在单引号中引用 ORDER BY 列，这将按每行相同的静态值“column_name”对行进行排序。

删除引号或用反引号替换它们:

$order == "" ? $order = "ORDER BY released" : $order = "ORDER BY ".$order;

或者:

$order == "" ? $order = "ORDER BY `released`" : $order = "ORDER BY `".$order."`";