php教程|php手册
php,生成,树形列表,mysql
php教程-php手册
php从数据库查询结果生成树形列表的方法，查询结果树形
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本代码可以从数据库读取数据生成一个类似于windows的资源管理器的树形列表
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<?php/* Here are the database definitions (for Solid) that i use in this code. * It should not be hard to adapt it to another database. *//*CREATE TABLE dirent_types ( id INTEGER NOT NULL, icon VARCHAR(50), name VARCHAR(50), PRIMARY KEY(id));INSERT INTO dirent_types VALUES(1, folderclosed, Directory);INSERT INTO dirent_types VALUES(2, document, File);CREATE TABLE directory ( id INTEGER NOT NULL, parent INTEGER REFERENCES directory(id), name VARCHAR(200), icon VARCHAR(50), type INTEGER REFERENCES dirent_types(id), url VARCHAR(200), PRIMARY KEY(id));DROP INDEX directory_idx;CREATE UNIQUE INDEX directory_idx ON directory(parent, name);CREATE SEQUENCE dirent_id;"CREATE PROCEDURE insert_dir_entry (name VARCHAR, parent INTEGER, type INTEGER) RETURNS(id INTEGER)BEGIN EXEC SQL WHENEVER SQLERROR ABORT; EXEC SEQUENCE dirent_id.NEXT INTO id; EXEC SQL PREPARE c_insert INSERT INTO directory (id, parent, type, name) VALUES(?, ?, ?, ?); EXEC SQL EXECUTE c_insert USING (id, parent, type, name); EXEC SQL DROP c_insert;END";CALL insert_dir_entry(My Computer, NULL, 1);CALL insert_dir_entry(Network Neighbourhood, NULL, 1);CALL insert_dir_entry(lucifer.guardian.no, 2, 1);CALL insert_dir_entry( afael.guardian.no, 2, 1);CALL insert_dir_entry(uriel.guardian.no, 2, 1);CALL insert_dir_entry(Control Panel, NULL, 1);CALL insert_dir_entry(Services, 6, 1);CALL insert_dir_entry(Apache, 7, 2);CALL insert_dir_entry(Solid Server 2.2, 7, 2);*/function icon($icon, $name = \, $width = 0, $height = 0) { global $DOCUMENT_ROOT; $icon_loc = /pics/menu; $file = "$DOCUMENT_ROOT$icon_loc/$icon.jpg"; if (!$width || !$height) { $iconinfo = getimagesize($file); if (!$width) { $width = $iconinfo[0]; } if (!$height) { $height = $iconinfo[1]; } } printf( \, $name ? " name=\"$name\"" : \, $icon, $width, $height);}function display_directory($parent,$showdepth=0,$ancestors=false){ global $child_nodes, $node_data, $last_child; reset($child_nodes[$parent]); $size = sizeof($child_nodes[$parent]); $lastindex = $size - 1; if (!$ancestors) { $ancestors = array(); } $depth = sizeof($ancestors); printf(
, $parent, $showdepth > 0 ? show : hide); while (list($index, $node) = each($child_nodes[$parent])) { for ($i = 0; $i < $depth; $i++) { $up_parent = (int)$node_data[$ancestors[$i]][ parent]; $last_node_on_generation = $last_child[$up_parent]; $uptree_node_on_generation = $ancestors[$i]; if ($last_node_on_generation == $uptree_node_on_generation) { icon( "blank"); } else { icon( "line"); } } if ($child_nodes[$node]) { // has children, i.e. it is a folder $conn_icon = "plus"; $expand = true; } else { $conn_icon = "join"; $expand = false; } if ($index == $lastindex) { $conn_icon .= "bottom"; } elseif ($depth == 0 && $index == 0) { $conn_icon .= "top"; } if ($expand) { printf( "", $node); } icon($conn_icon, "connImg_$node"); if ($expand) { print( ""); } $icon = $node_data[$node][ icon]; if (!$icon) { $type = $node_data[$node][ ype]; $icon = $GLOBALS[ dirent_icons][$type]; } icon($icon, "nodeImg_$node"); $name = $node_data[$node][ ame]; printf( ?%s
, -1, $name, 10); if ($child_nodes[$node]) { $newdepth = $showdepth; if ($newdepth > 0) { $newdepth--; } $new_ancestors = $ancestors; $new_ancestors[] = $node; display_directory($node, $newdepth, $new_ancestors); } } print( "
");}function setup_directory($parent, $maxdepth){ global $dirent_icons, $child_nodes, $node_data, $last_child; $dirent_icons = sql_assoc(SELECT id,icon FROM dirent_types); $query = SELECT id,parent,type,icon,name . FROM directory . ORDER BY parent,name; $child_nodes = array(); $node_data = array(); $res = sql($query); while (list($id,$parent,$type,$icon,$name)=db_fetch_row($res)){ $child_nodes[(int)$parent][] = $id; $node_data[$id] = array( id => $id, parent => $parent, ype => $type, icon => $icon, ame => $name); $last_child[(int)$parent] = $id; }}?>
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