php增,改,删除操作

<?php
class main extends spController
{
    function index(){
    echo "<p align=center><h1>HIS基础数据维护</h1>";
    echo "<p align=center><h2>科室字典</h2>";
    $contentsurl=spUrl("main", "index0");
    echo "<a href={$contentsurl} target=_blank>详细信息</a></p>";
    //增加科室 
    $contentsurl=spUrl("main", "add0");
    echo "<a href={$contentsurl} target=_blank>增加科室</a></p>";
    //统计科室 
    $contentsurl=spUrl("main", "stat0");
    echo "<a href={$contentsurl} target=_blank>统计科室</a></p>";
    echo "<p align=center><h2>药品字典</h2></p>";  
    $contentsurl=spUrl("main", "index1");
    echo "<a href={$contentsurl} target=_blank>详细信息</a></p>";
 
    echo "<p align=center><h2>门诊信息查询</h2></p>";  
    $contentsurl=spUrl("main", "diagnose");
    echo "<a href={$contentsurl} target=_blank>诊断信息</a></p>";
    } 
  function index0(){   
    echo "<p align=center><h2>科室字典数据维护</h2></p>"; 
    $zd_unit_code = spClass("zd_unit_code"); //
    echo "<p>代码  名称  拼音代码</p>";
    if( $result = $zd_unit_code->findAll() ){
   foreach($result as $value){
  echo "<p>{$value['code']}";
  echo "  {$value['name']}";
  echo "  {$value['py_code']}";
  $contentsurl = spUrl("main", "show0", array('code'=>$value['code'