使用數組/字母表化表數據使用數組/ if語句

Question

我有一些數據，我循環和使用if語句的字母化。我的代碼有效，但問題在於它看起來像是一個「很長的路」。我想知道是否還有另一種我錯過的方法可以使這更容易。

這裏是我的PHP：

// MY QUERY 
$query1 = "SELECT `categoryid`, `categoryname` 
      FROM `my_table_category` 
      ORDER BY `my_table_category`.`categoryname` ASC"; 

$browse = mysql_query($query1) or die(mysql_error()); 
$browse_rows = array(); 
while($row = mysql_fetch_assoc($browse)){ 
    $browse_rows[] = $row; 
    } 

// HERE MY ARRAYS FOR THE ALPHABET 
    $list_a = array(); $list_b = array(); $list_c = array(); 
    $list_d = array(); $list_e = array(); $list_f = array(); 
    $list_g = array(); $list_h = array(); $list_i = array(); 
// etc... 

// HERE IS WHERE I'M GRABBING THE CATEGORY NAMES BY THEIR FIRST LETTER 
// AND ADDING THEM TO AN ARRAY 
foreach($browse_rows as $row){ 
    if($row['categoryname'][0] == 'A'){ 
     $list_a[] = $row['categoryname']; 
    }elseif($row['categoryname'][0] == 'B'){ 
     $list_b[] = $row['categoryname']; 
    }elseif($row['categoryname'][0] == 'C'){ 
     $list_c[] = $row['categoryname']; 
    }elseif($row['categoryname'][0] == 'D'){ 
     $list_d[] = $row['categoryname']; 
    } 
} //etc... 

這裏是我的HTML：

<!-- HERE IS HOW I DISPLAY MY DATA --> 
<div id="topics_a"> 
      <h2>A</h2> 
      <ul class="browse_list"> 
      <? 
      foreach($list_a as $name){ 
       if ($holdcat <> $name) { 
       $holdcat = $name; ?> 
       <li><a href="index.php?state="<? echo $template->State."#".$browse_row['categoryid'];?>><? echo $name; ?></a></li> 
      <? }} ?> 
      </ul> 
     </div> 

     <div id="topics_b"> 
      <h2>B</h2> 
      <ul class="browse_list"> 
      <? 
      foreach($list_b as $name){ 
       if ($holdcat <> $name) { 
       $holdcat = $name; ?> 
       <li><a href="index.php?state="<? echo $template->State."#".$browse_row2['categoryid'];?>><? echo $name; ?></a></li> 
      <? }} ?> 
      </ul> 
     </div> 
//etc... 

答案後更新：

//UPDATED PHP 
foreach ($browse_rows as $row) { 
$initial = $row['categoryname'][0]; 
    $lists[$initial][] = $row['categoryname']; 
} 
//UPDATED HTML 
<? foreach ($lists as $letter => $list){ ?> 
      <div> 
       <h2><? echo $letter; ?></h2> 
       <ul class="browse_list"> 
      <? 
      $list = array_unique($list); 
      foreach ($list as $cat) { 
      ?> 
       <li><a href="#"><? echo $cat; ?></a></li> 
      <? } ?> 
      </ul> 
     </div> 
      <? } ?> 

輸出： http://d.pr/i/bt68

Answer 1

使用多維數組，而不是爲每個字母單獨排列數組。

$lists = array(); 
foreach ($browse_list as $row) { 
    $initial = $row['categoryname'][0]; 
    if (!isset($row[$initial])) { 
     $lists[$initial] = array(); 
    } 
    $lists[$initial][] = $row['categoryname']; 
} 

然後，當你想要顯示它，通過按鍵對數組進行排序，然後使用嵌套循環：

ksort($lists); 
foreach ($lists as $list) { 
    echo '<ul class="browse_list">'; 
    $list = array_unique($list); // get rid of duplicates 
    foreach ($list as $cat) { 
     echo '<li><a href="#">' . $cat . '</a></li>'; 
    } 
    echo '</ul>'; 
}