二维数组

Question

我有2个阵列：

$name = Array ( [0] => 2 [1] => 1 [2] => 0 [3] => 0 [4] => 0 [5] => 0 [6] => 0 [7] => 0 [8] => 0 [9] => 0 )

$id = Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 [8] => 9 [9] => 10 ) 

我想按$name值排序，但我不需要，0在哪里 但是当我这样做时：

foreach ($name as $key => $n) {
if ($n ==0 ){} else{
    echo "valami[" . $key . "] = " . $n . "//" .$id[$key]."";
}}

我丢失了正确的$ id [$ key]

请帮助我！

$_POST：

<?php echo "<form name='pdf_form2' action='pdf.php' method='post' enctype='multipart/form-data'>";
    $berelhetok = getreclist("SELECT *, count(*) as count FROM rent GROUP BY rent_id ORDER BY rent_id");
    $result = mysql_query("SELECT *, count(*) as count FROM rent GROUP BY rent_id ORDER BY rent_id");
    $num_rows = mysql_num_rows($result);
    foreach($berelhetok as $berel){
    echo "<tr>
    <td><select name='name[]'>
    <option  value='0'></option>";
    for ($i = 1; $i <= $num_rows; $i++) {
    echo "<option  value='".$i."'>".$i."</option>";
    }
    echo "</select></td>
    <td align='center'>".$berel[rent_id]."</td>
    <INPUT TYPE='hidden' name='id[]' VALUE='".$berel[rent_id]."'>
    <td align='center'>".$berel[rent_megnevezes]."</td>
    <td align='center'><img src='".$berel[rent_kezdokep]."' width='100px' /></td>";
    } ?><INPUT TYPE="hidden" name="menu_id" VALUE="<?=$menu_id;?>">

        <tr>
            <td align="center" colspan="2"><input type="submit" name="submit" value="Mentés" class="button"> 
</td>
        </tr>
</form>

Answer 1

您可以使用array_filter过滤那些值为0

的元素

例如

$name = array ( 0 => 2, 1 => 1, 2 => 0, 3 => 0, 4 => 0, 5 => 0, 6 => 0, 7 => 0, 8 => 0, 9 => 0 );

$id = array ( 0 => 1, 1 => 2, 2 => 3, 3 => 4, 4 => 5, 5 => 6, 6 => 7, 7 => 8, 8 => 9, 9 => 10);

$name = array_filter($name);
foreach ($name as $key => $n) {

    echo "valami[" . $key . "] = " . $n . "//" .$id[$key]."";
}

输出： -

valami[0] = 2//1
valami[1] = 1//2