回答編集履歴
5
PHP修正
test
CHANGED
@@ -258,8 +258,16 @@
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+
※PHP修正
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```PHP
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try{
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/* PDOの接続は自身の環境に合わせて下さい */
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@@ -330,8 +338,6 @@
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if($row["link"]==1 and $row["url"]!==""){
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333
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-
/* item-arrowクラスの付け方がおかしかったので修正 */
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-
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$class=$row["child"]>0?" class=\"item-arrow\"":"";
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print "<a href=\"{$row["url"]}\"{$class}>{$row["name"]}</a>";
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@@ -354,13 +360,13 @@
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print "</li>".PHP_EOL;
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-
for($i=$l2-$l3-1;$i
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+
for($i=0;$i<$l2-$l3-1;$i++){
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-
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-
print str_repeat(" ",($i)*$indent);
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print str_repeat(" ",($l2-$i-1)*$indent);
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print "</ul>".PHP_EOL;
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-
print str_repeat(" ",($i-
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print str_repeat(" ",($l2-$i-2)*$indent);
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print "</li>".PHP_EOL;
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@@ -370,6 +376,14 @@
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print "</ul>".PHP_EOL;
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if($l3>0){
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print str_repeat(" ",($l3-1)*$indent);
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print "</li>".PHP_EOL;
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}
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}
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$l1=$l2;
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4
typo
test
CHANGED
@@ -262,29 +262,27 @@
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try{
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-
$dsn = 'mysql:host=localhost; dbname=mydb;charset=utf8;';
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-
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-
$user = 'root';
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-
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-
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/* PDOの接続は自身の環境に合わせて下さい */
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$pdo = new PDO($dsn, $user,$password);
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-
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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-
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$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
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-
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$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES,false);
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-
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$sql ='SELECT name,level,url,link,(SELECT COUNT(*) FROM tbl AS t2 WHERE t2.l BETWEEN t1.l AND t1.r AND t2.level=t1.level+1) AS child FROM tbl AS t1 ORDER BY l';
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/* 今回prepare処理は不要なのでqueryに変更しておきます
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$stmt = $pdo->prepare($sql);
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$stmt->execute([]);
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*/
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$stmt = $pdo->query($sql);
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$rows=$stmt->fetchAll(PDO::FETCH_ASSOC);
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/*当初gett_reeになっていたので修正します*/
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-
print gett
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print get_tree($rows);
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}catch(PDOException $e){
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3
修正
test
CHANGED
@@ -332,7 +332,11 @@
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if($row["link"]==1 and $row["url"]!==""){
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/* item-arrowクラスの付け方がおかしかったので修正 */
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$class=$row["child"]>0?" class=\"item-arrow\"":"";
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-
print "<a href=\"{$row["url"]}\"
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print "<a href=\"{$row["url"]}\"{$class}>{$row["name"]}</a>";
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}else{
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2
PHP
test
CHANGED
@@ -227,3 +227,165 @@
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ORDER BY l
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```
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# PHPへの書き出し
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以前作った分の流用なので若干インデントのバグがありますが
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出力するHTML文としてはさほど問題ないはずです
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※ポイント
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- classの指定など最大限当初例示いただいたHTMLにあわせたつもりですが
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おかしかったらうまく調整してください
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- linkが1でURLが空でなければアンカーが貼られます
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あえてリンクを表示したくない場合レコードのlinkを0にするなどテストしてみてください
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- ただしhtmlspecialcharやurlencodeなどかけてないので注意
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250
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- 一応直下の要素数をカウントして表示しておきました
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ちなみに、以下SQL文にすればカテゴリを含むすべての子要素数が表示されます
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SELECT name,level,url,link,(SELECT COUNT(*)-1 FROM tbl AS t2 WHERE t2.l BETWEEN t1.l AND t1.r ) AS child FROM tbl AS t1 ORDER BY l
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258
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```PHP
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try{
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$dsn = 'mysql:host=localhost; dbname=mydb;charset=utf8;';
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$user = 'root';
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$password = '*****';
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$pdo = new PDO($dsn, $user,$password);
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$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
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$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES,false);
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$sql ='SELECT name,level,url,link,(SELECT COUNT(*) FROM tbl AS t2 WHERE t2.l BETWEEN t1.l AND t1.r AND t2.level=t1.level+1) AS child FROM tbl AS t1 ORDER BY l';
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$stmt = $pdo->prepare($sql);
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$stmt->execute([]);
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$rows=$stmt->fetchAll(PDO::FETCH_ASSOC);
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print gett_ree($rows);
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+
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}catch(PDOException $e){
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die($e->getMessage());
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}
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function get_tree($rows){
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$indent=3;
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301
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$l1=0;
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ob_start();
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foreach($rows as $key=>$row){
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$l2=$row["level"];
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$l3=($key<count($rows)-1)?$rows[$key+1]["level"]:0;
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if($l1>=$l2){
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print str_repeat(" ",($l2-1)*$indent);
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}
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if($l1<$l2){
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+
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print PHP_EOL;
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320
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+
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print str_repeat(" ",($l2-1)*$indent);
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$class=$row["level"]>1?" class=\"level{$row["level"]}\"":"";
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324
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325
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print "<ul{$class}>".PHP_EOL;
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326
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327
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print str_repeat(" ",($l2-1)*$indent);
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328
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+
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329
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+
}
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330
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331
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print "<li>";
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332
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333
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if($row["link"]==1 and $row["url"]!==""){
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334
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+
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335
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print "<a href=\"{$row["url"]}\" class=\"item-arrow\">{$row["name"]}</a>";
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336
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+
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337
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+
}else{
|
338
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+
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339
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print $row["name"];
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340
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+
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341
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+
}
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342
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+
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343
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if($row["child"]>0) print "(".$row["child"].")";
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344
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+
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345
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+
if($l2==$l3){
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346
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+
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347
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+
print "</li>".PHP_EOL;;
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348
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+
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349
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+
}
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350
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+
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351
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+
if($l2>$l3){
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352
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+
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353
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+
print "</li>".PHP_EOL;
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354
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+
|
355
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+
for($i=$l2-$l3-1;$i>0;$i--){
|
356
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+
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357
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+
print str_repeat(" ",($i)*$indent);
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358
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+
|
359
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+
print "</ul>".PHP_EOL;
|
360
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+
|
361
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+
print str_repeat(" ",($i-1)*$indent);
|
362
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+
|
363
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+
print "</li>".PHP_EOL;
|
364
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+
|
365
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+
}
|
366
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+
|
367
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+
print str_repeat(" ",($l3)*$indent);
|
368
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+
|
369
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+
print "</ul>".PHP_EOL;
|
370
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+
|
371
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+
}
|
372
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+
|
373
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+
$l1=$l2;
|
374
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+
|
375
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+
}
|
376
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+
|
377
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+
$str=ob_get_contents();
|
378
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+
|
379
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+
ob_end_clean();
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380
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+
|
381
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+
return $str;
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382
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+
|
383
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+
}
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384
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+
|
385
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+
|
386
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+
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387
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+
```
|
388
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+
|
389
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+
|
390
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+
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391
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+
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1
別テーブル
test
CHANGED
@@ -9,3 +9,221 @@
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9
9
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10
10
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11
11
|
今回のテーブル構成はマストでしょうか?
|
12
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+
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13
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+
|
14
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+
|
15
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+
# 隣接リストモデルから入れ子集合モデルへ
|
16
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+
|
17
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+
|
18
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+
|
19
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+
- 隣接リストモデル
|
20
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+
|
21
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+
```SQL
|
22
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+
|
23
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+
create table tbl(
|
24
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+
|
25
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+
id int not null unique,
|
26
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+
|
27
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+
parent_id int null,
|
28
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+
|
29
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+
name varchar(30),
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30
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+
|
31
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+
url varchar(100),
|
32
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+
|
33
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+
link tinyint,
|
34
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+
|
35
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+
level int not null default 0,
|
36
|
+
|
37
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+
l int null,
|
38
|
+
|
39
|
+
r int null
|
40
|
+
|
41
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+
);
|
42
|
+
|
43
|
+
```
|
44
|
+
|
45
|
+
- 入れ子集合モデルへのコンバータ
|
46
|
+
|
47
|
+
```SQL
|
48
|
+
|
49
|
+
DROP PROCEDURE IF EXISTS SET_LR;
|
50
|
+
|
51
|
+
DELIMITER //
|
52
|
+
|
53
|
+
CREATE PROCEDURE SET_LR()
|
54
|
+
|
55
|
+
BEGIN
|
56
|
+
|
57
|
+
DECLARE a INT DEFAULT 0;
|
58
|
+
|
59
|
+
DECLARE done INT DEFAULT 0;
|
60
|
+
|
61
|
+
DECLARE CUR CURSOR FOR
|
62
|
+
|
63
|
+
SELECT id FROM tbl WHERE level=0 ORDER BY parent_id ASC,id DESC;
|
64
|
+
|
65
|
+
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;
|
66
|
+
|
67
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+
UPDATE tbl SET level=0,l=0,r=0;
|
68
|
+
|
69
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+
/* level,l,rを初期化*/
|
70
|
+
|
71
|
+
|
72
|
+
|
73
|
+
UPDATE tbl SET level=1,l=(SELECT @a:=@a+1 FROM (SELECT @a:=0) AS sub),r=@a:=@a+1
|
74
|
+
|
75
|
+
WHERE parent_id IS NULL
|
76
|
+
|
77
|
+
ORDER BY id;
|
78
|
+
|
79
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+
/* 先頭データのlevelを1とし、l,rを1ずつ足していく*/
|
80
|
+
|
81
|
+
|
82
|
+
|
83
|
+
OPEN CUR;
|
84
|
+
|
85
|
+
REPEAT
|
86
|
+
|
87
|
+
FETCH CUR INTO a;
|
88
|
+
|
89
|
+
IF NOT done THEN
|
90
|
+
|
91
|
+
SET @id=a;
|
92
|
+
|
93
|
+
SET @sql='UPDATE tbl as a1,tbl as a2,tbl as a3 SET a1.l=a2.l+1,a1.r=a2.l+2,a1.level=a2.level+1,a2.r=a2.r+2,a3.r=a3.r+2 WHERE a1.parent_id=a2.id AND a2.l<a3.r AND a1.id=?';
|
94
|
+
|
95
|
+
/* 子のlに親の1+1、子のrに親のl+2,子のlevelに親のlevel+1親のrを2増やす、親のlより大きいrを2増やす */
|
96
|
+
|
97
|
+
|
98
|
+
|
99
|
+
PREPARE stmt from @sql;
|
100
|
+
|
101
|
+
EXECUTE stmt USING @id;
|
102
|
+
|
103
|
+
SET @sql='UPDATE tbl as a1,tbl as a2,tbl as a3 SET a3.l=a3.l+2 WHERE a1.parent_id=a2.id AND a2.l<a3.l and a3.id!=a1.id AND a1.id=?';
|
104
|
+
|
105
|
+
/* 親の1より大きいlの内、子以外のものを2増やす */
|
106
|
+
|
107
|
+
|
108
|
+
|
109
|
+
PREPARE stmt from @sql;
|
110
|
+
|
111
|
+
EXECUTE stmt USING @id;
|
112
|
+
|
113
|
+
END IF;
|
114
|
+
|
115
|
+
UNTIL done END REPEAT;
|
116
|
+
|
117
|
+
CLOSE CUR;
|
118
|
+
|
119
|
+
END
|
120
|
+
|
121
|
+
//
|
122
|
+
|
123
|
+
DELIMITER ;
|
124
|
+
|
125
|
+
```
|
126
|
+
|
127
|
+
- データ投入
|
128
|
+
|
129
|
+
```SQL
|
130
|
+
|
131
|
+
insert into tbl(id,parent_id,name,url,link) values
|
132
|
+
|
133
|
+
( 1,null,'A','#',1),
|
134
|
+
|
135
|
+
( 2,null,'B','#',1),
|
136
|
+
|
137
|
+
( 3,1,'AA','#',1),
|
138
|
+
|
139
|
+
( 4,1,'BB','#',1),
|
140
|
+
|
141
|
+
( 5,2,'AA','#',1),
|
142
|
+
|
143
|
+
( 6,2,'BB','#',1),
|
144
|
+
|
145
|
+
( 7,3,'AAA','#',1),
|
146
|
+
|
147
|
+
( 8,3,'BBB','#',1),
|
148
|
+
|
149
|
+
( 9,3,'CCC','#',1),
|
150
|
+
|
151
|
+
(10,4,'BBB','#',1),
|
152
|
+
|
153
|
+
(11,4,'CCC','#',1),
|
154
|
+
|
155
|
+
(12,5,'AAA','#',1),
|
156
|
+
|
157
|
+
(13,6,'AAA','#',1),
|
158
|
+
|
159
|
+
(14,6,'BBB','#',1),
|
160
|
+
|
161
|
+
(15,7,'A-ct4','#',1),
|
162
|
+
|
163
|
+
(16,8,'A-ct4','#',1),
|
164
|
+
|
165
|
+
(17,8,'B-ct4','#',1),
|
166
|
+
|
167
|
+
(18,9,'A-ct4','#',1),
|
168
|
+
|
169
|
+
(19,10,'A-ct4','#',1),
|
170
|
+
|
171
|
+
(20,11,'B-ct4','#',1),
|
172
|
+
|
173
|
+
(21,12,'A-ct4','#',1),
|
174
|
+
|
175
|
+
(22,13,'B-ct4','#',1),
|
176
|
+
|
177
|
+
(23,14,'A-ct4','#',1),
|
178
|
+
|
179
|
+
(24,21,'A-ct5','#',1),
|
180
|
+
|
181
|
+
(25,22,'B-ct5','#',1),
|
182
|
+
|
183
|
+
(26,23,'C-ct5','#',1),
|
184
|
+
|
185
|
+
(27,24,'A-ct6','#',1),
|
186
|
+
|
187
|
+
(28,15,'name1001','www',1),
|
188
|
+
|
189
|
+
(29,16,'name1002','www',1),
|
190
|
+
|
191
|
+
(30,17,'name1003','www',1),
|
192
|
+
|
193
|
+
(31,18,'name1004','www',1),
|
194
|
+
|
195
|
+
(32,19,'name1005','www',1),
|
196
|
+
|
197
|
+
(33,19,'name1006','www',1),
|
198
|
+
|
199
|
+
(34,20,'name1007','www',1),
|
200
|
+
|
201
|
+
(35,27,'name1008','www',1),
|
202
|
+
|
203
|
+
(36,25,'name1009','www',1),
|
204
|
+
|
205
|
+
(37,26,'name1010','www',1);
|
206
|
+
|
207
|
+
```
|
208
|
+
|
209
|
+
- コンバート
|
210
|
+
|
211
|
+
```SQL
|
212
|
+
|
213
|
+
CALL SET_LR;
|
214
|
+
|
215
|
+
```
|
216
|
+
|
217
|
+
# 階層状況の確認
|
218
|
+
|
219
|
+
|
220
|
+
|
221
|
+
```SQL
|
222
|
+
|
223
|
+
SELECT CONCAT( REPEAT( "__", LEVEL -1 ) , name ) AS name
|
224
|
+
|
225
|
+
FROM area
|
226
|
+
|
227
|
+
ORDER BY l
|
228
|
+
|
229
|
+
```
|