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?php
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class MysqlManage{
/*创建数据库，并且主键是aid
* table 要查询的表名
*/
function createTable($table){
$sql="CREATE TABLE IF NOT EXISTS `$table` (`aid` INT NOT NULL primary key)ENGINE = InnoDB;";
M()-execute($sql);
$this-checkTable($table);
}
/*
* 检测表是否存在，也可以获取表中所有字段的信息
* table 要查询的表名
* return 表里所有字段的信息
*/
function checkTable($table){
$sql="desc `$table`";
$info=M()-execute($sql);
return $info;
}
/*
* 检测字段是否存在，也可以获取字段信息(只能是一个字段)
* table 表名
* field 字段名
*/
function checkField($table,$field){
$sql='desc `$table` $field';
$info=M()-execute($sql);
return $info;
}
/*
* 添加字段
* table 表名
* info 字段信息数组 array
* return 字段信息 array
*/
function addField($table,$info){
$sql="alter table `$table` add column";
$sql.=$this-filterFieldInfo();
M()-execute($sql);
$this-checkField($table,$info['name']);
}
/*
* 修改字段
* 不能修改字段名称，只能修改
*/
function editField($table,$info){
$sql="alter table `$table` modify ";
$sql.=$this-filterFieldInfo($info);
M()-execute($sql);
$this-checkField($table,$info['name']);
}
/*
* 字段信息数组处理，供添加更新字段时候使用
* info[name] 字段名称
* info[type] 字段类型
* info[length] 字段长度
* info[isNull] 是否为空
* info['default'] 字段默认值
* info['comment'] 字段备注
*/
private function filterFieldInfo($info){
if(!is_array($info))
return
$newInfo=array();
$newInfo['name']=$info['name'];
$newInfo['type']=$info['type'];
switch($info['type']){
case 'varchar':
case 'char':
$newInfo['length']=empty($info['length'])?100:$info['length'];
$newInfo['isNull']=$info['isNull']==1?'NULL':'NOT NULL';
$newInfo['default']=empty($info['default'])?'':'DEFAULT '.$info['default'];
$newInfo['comment']=empty($info['comment'])?'':'COMMENT '.$info['comment'];
break;
case 'int':
$newInfo['length']=empty($info['length'])?7:$info['length'];
$newInfo['isNull']=$info['isNull']==1?'NULL':'NOT NULL';
$newInfo['default']=empty($info['default'])?'':'DEFAULT '.$info['default'];
$newInfo['comment']=empty($info['comment'])?'':'COMMENT '.$info['comment'];
break;
case 'text':
$newInfo['length']='';
$newInfo['isNull']=$info['isNull']==1?'NULL':'NOT NULL';
$newInfo['default']='';
$newInfo['comment']=empty($info['comment'])?'':'COMMENT '.$info['comment'];
break;
}
$sql=$newInfo['name']." ".$newInfo['type'];
$sql.=(!empty($newInfo['length']))?($newInfo['length']) .' ':' ';
$sql.=$newInfo['isNull'].' ';
$sql.=$newInfo['default'];
$sql.=$newInfo['comment'];
return $sql;
}
/*
* 删除字段
* 如果返回了字段信息则说明删除失败，返回false，则为删除成功
*/
function dropField($table,$field){
$sql="alter table `$table` drop column $field";
M()-execute($sql);
$this-checkField($table,$filed);
}
/*
* 获取指定表中指定字段的信息(多字段)
*/
function getFieldInfo($table,$field){
$info=array();
if(is_string($field)){
$this-checkField($table,$field);
}else{
foreach($field as $v){
$info[$v]=$this-checkField($table,$v);
}
}
return $info;
}
}
输入
然后用你设置的用户名和密码登入 用户名一般为root
新建数据库选下字符集就好了 输入想新建的数据库的字段数。。。
function add($name, $type, $size, $defaultvalue = '', $options = '', $title = '', $note = '', $formtype = '', $inputtool = '', $inputlimit = '', $enablehtml = 1, $enablelist = 1, $enablesearch = 0)
{
if(!in_array($type, $this-fieldtypes) || $this-exists($name)) return FALSE;
$size = intval($size);
$fieldsize = $type == 'varchar' ? min($size, 255) : ($type == 'int' ? min($size, 10) : 0);
$fieldtype = strtoupper($type);
if($fieldsize) $fieldtype .= "( $fieldsize )";
$this-db-query("ALTER TABLE $this-table ADD $name $fieldtype NOT NULL");
$this-db-query("INSERT INTO ".TABLE_FIELD."(tablename,name,type,size,defaultvalue,options,title,note,formtype,inputtool,inputlimit,enablehtml,enablelist,enablesearch) VALUES('$this-table','$name','$type','$size','$defaultvalue','$options','$title','$note','$formtype','$inputtool','$inputlimit','$enablehtml','$enablelist','$enablesearch')");
$result = $this-db-affected_rows();
$this-cache();
return $result;
}
function edit($fieldid, $type, $size, $defaultvalue = '', $options = '', $title = '', $note = '', $formtype = '', $inputtool = '', $inputlimit = '', $enablehtml = 1, $enablelist = 1, $enablesearch = 0)
{
if(!in_array($type, $this-fieldtypes)) return FALSE;
$fieldid = intval($fieldid);
$field = $this-get_info($fieldid);
$name = $field['name'];
$size = intval($size);
$fieldsize = $type == 'varchar' ? min($size, 255) : ($type == 'int' ? min($size, 10) : 0);
$fieldtype = strtoupper($type);
if($fieldsize) $fieldtype .= "( $fieldsize )";
$this-db-query("ALTER TABLE `$this-table` CHANGE `$name` `$name` $fieldtype NOT NULL");
$this-db-query("UPDATE ".TABLE_FIELD." SET title='$title',note='$note',type='$type',size='$size',defaultvalue='$defaultvalue',options='$options',formtype='$formtype',inputtool='$inputtool',inputlimit='$inputlimit',enablehtml='$enablehtml',enablelist='$enablelist',enablesearch='$enablesearch' WHERE fieldid=$fieldid");
$result = $this-db-affected_rows();
$this-cache();
return $result;
}
function delete($fieldid)
{
$fieldid = intval($fieldid);
$r = $this-db-get_one("SELECT name FROM ".TABLE_FIELD." WHERE fieldid=$fieldid");
if(!$r) return FALSE;
$name = $r['name'];
$this-db-query("ALTER TABLE $this-table DROP $name");
$this-db-query("DELETE FROM ".TABLE_FIELD." WHERE fieldid=$fieldid");
$result = $this-db-affected_rows();
$this-cache();
return $result;
}
db数据库类去下个phpcms里面的就是上面的是自定义字段的操作函数
mysql_connect('地址','用户名','密码');
mysql_select_db('数据库名');
$sql = "ALTER TABLE `表名` ADD `列名` 数据类型";
mysql_query($sql);