PHP实现windows风格的树型菜单

  • 来源: IT168.com  作者: 若水   2008-03-27/17:36
  •    以下是一个风格类似windows资源管理器的树型菜单,将下面的脚本包含到你的页面中,另外需要从资源管理器中截取一些gif图片,祥见脚本中的注释,菜单结构文件的格式为:
    tree level|item text|item link|link target|last item in subtree
    例如
    .<b>Demo menu</b>|javascript: alert('This is the demo menu for TreeMenu 1.0');
    ..<b>目录1</b>
    ...<b>子目录 1.1</b>
    ....item 1.1.1|javascript: alert('Item 1.1.1');
    ....item 1.1.2|javascript: alert('Item 1.1.1');
    ...item 1.2|javascript: alert('Item 1.2');
    ...item 1.3|javascript: alert('Item 1.3');
    ..<b>子目录 2</b>
    ...item 2.1|javascript: alert('Item 2.1');
    ...item 2.2|javascript: alert('Item 2.2');
    ...<b>子目录 2.3</b>
    ....item 2.3.1|javascript: alert('Item 2.3.1');
    ....item 2.3.2|javascript: alert('Item 2.3.2');
    <?php
    // file:tremenu.inc
    // PHP TreeMenu
    /////////////////
    // 初始化 //
    /////////////////

    $treefile = "demomenu.txt";//设置有菜单结构的文件

    if(isset($PATH_INFO))
    $script = $PATH_INFO;
    else
    $script = $SCRIPT_NAME;

    //以下图片可截取windows资源管理器中的相应位置的图

    $img_expand = "tree_expand.gif";//形如资源管理器中可扩展节点+
    $img_collapse = "tree_collapse.gif";//形如资源管理器中已扩展节点-
    $img_line = "tree_vertline.gif";//形如|
    $img_split = "tree_split.gif";//形如|-
    $img_end = "tree_end.gif";//形如L
    $img_leaf = "tree_leaf.gif";//形如o
    $img_spc = "tree_space.gif";//空白图

    //以下是菜单处理脚本

    $maxlevel=0;
    $cnt=0;

    $fd = fopen($treefile, "r");
    if ($fd==0) die("treemenu.inc : Unable to open file ".$treefile);
    while ($buffer = fgets($fd, 4096))
    {
    $tree[$cnt][0]=strspn($buffer,".");
    $tmp=rtrim(substr($buffer,$tree[$cnt][0]));
    $node=explode("|",$tmp);
    $tree[$cnt][1]=$node[0];
    $tree[$cnt][2]=$node[1];
    $tree[$cnt][3]=$node[2];
    $tree[$cnt][4]=0;
    if ($tree[$cnt][0] > $maxlevel) $maxlevel=$tree[$cnt][0];
    $cnt++;
    }
    fclose($fd);

    for ($i=0; $i<count($tree); $i++)
    {
    $expand[$i]=0;
    $visible[$i]=0;
    $levels[$i]=0;
    }

    if ($p!="")
    $explevels = explode("|",$p);
    $i=0;
    while($i<count($explevels))
    {
    $expand[$explevels[$i]]=1;
    $i++;
    }

    $lastlevel=$maxlevel;
    for ($i=count($tree)-1; $i>=0; $i--)
    {
    if ( $tree[$i][0] < $lastlevel )
    for ($j=$tree[$i][0]+1; $j <= $maxlevel; $j++)
    $levels[$j]=0;
    if ( $levels[$tree[$i][0]]==0 )
    {
    $levels[$tree[$i][0]]=1;
    $tree[$i][4]=1;
    }
    else
    $tree[$i][4]=0;
    $lastlevel=$tree[$i][0];
    }

    for ($i=0; $i < count($tree); $i++)
    if ($tree[$i][0]==1)
    $visible[$i]=1;
    for ($i=0; $i < count($explevels); $i++)
    {
    $n=$explevels[$i];
    if ( ($visible[$n]==1) && ($expand[$n]==1) )
    {
    $j=$n+1;
    while ( $tree[$j][0] > $tree[$n][0] )
    {
    if ($tree[$j][0]==$tree[$n][0]+1) $visible[$j]=1;
    $j++;
    }
    }
    }

    for ($i=0; $i<$maxlevel; $i++)
    $levels[$i]=1;

    $maxlevel++;

    echo "<table cellspacing=0 cellpadding=0 border=0 cols=".($maxlevel+3).">\n";
    echo "<tr>";
    for ($i=0; $i<$maxlevel; $i++)
    echo "<td width=16></td>";
    echo "<td width=100%>&nbsp;</td></tr>\n";
    $cnt=0;
    while ($cnt<count($tree))
    {
    if ($visible[$cnt])
    {
    echo "<tr>";
    $i=0;
    while ($i<$tree[$cnt][0]-1)
    {
    if ($levels[$i]==1)
    echo "<td><a name='$cnt'></a><img src=\"".$img_line."\"></td>";
    else
    echo "<td><a name='$cnt'></a><img src=\"".$img_spc."\"></td>";
    $i++;
    }
    if ($tree[$cnt][4]==1)
    {
    echo "<td><img src=\"".$img_end."\"></td>";
    $levels[$tree[$cnt][0]-1]=0;
    }
    else
    {
    echo "<td><img src=\"".$img_split."\"></td>";
    $levels[$tree[$cnt][0]-1]=1;
    }

    if ($tree[$cnt+1][0]>$tree[$cnt][0])
    {

    $i=0; $params="?p=";
    while($i<count($expand))
    {
    if ( ($expand[$i]==1) && ($cnt!=$i) || ($expand[$i]==0 && $cnt==$i))
    {
    $params=$params.$i;
    $params=$params."|";
    }
    $i++;
    }

    if ($expand[$cnt]==0)
    echo "<td><a href=\"".$script.$params."#$cnt\"><img src=\"".$img_expand."\" border=no></a></td>"; #p#分页标题#e#
    else
    echo "<td><a href=\"".$script.$params."#$cnt\"><img src=\"".$img_collapse."\" border=no></a></td>";
    }
    else
    echo "<td><img src=\"".$img_leaf."\"></td>";

    if ($tree[$cnt][2]=="")
    echo "<td colspan=".($maxlevel-$tree[$cnt][0]).">".$tree[$cnt][1]."</td>";
    else
    echo "<td colspan=".($maxlevel-$tree[$cnt][0])."><a href=\"".$tree[$cnt][2]."\" target=\"".$tree[$cnt][3]."\">".$tree[$cnt][1]."</a></td>";
    echo "</tr>\n";
    }
    $cnt++;
    }
    echo "</table>\n";
    ?> 

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