437 lines
11 KiB
PHP
437 lines
11 KiB
PHP
<?php
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$global_sql=null;
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function get_sql()
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{
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global $global_sql;
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if($global_sql)
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return $global_sql;
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$global_sql=new mysqli($_SESSION["DB_ADDRESS"],$_SESSION["DB_USERNAME"],$_SESSION["DB_PASSWORD"],$_SESSION["DB_NAME"]);
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if($global_sql->connect_error)
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{
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echo "Connection Database error: ".$global_sql->connect_error;
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return null;
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}
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$global_sql->query("SET NAMES 'utf8'");
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$global_sql->query("USE ".$_SESSION["DB_NAME"]);
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return $global_sql;
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}
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// class SQLSelect
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// {
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// private $field_array=null;
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//
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// private $where=null;
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// private $limit_start=0;
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// private $limit_count=0;
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//
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// public
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// };//class SQLSelect
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//
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// class SQLTable
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// {
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// private $sql=null;
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// private $table_name=null;
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// private $insert_id=0;
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//
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// private $field_array=null;
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//
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// public function __construct($s,$tn)
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// {
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// $this->sql=$s;
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// $this->table_name=$tn;
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// }
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//
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// public function get_field_list()
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// {
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// if($field_array)
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// return $field_array;
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//
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// $sql_result=$this->sql->query("DESC ".$this->table_name);
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//
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// if(!$sql_result)
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// return null;
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//
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// $this->field_list=array();
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// while ($row = $sql_result->fetch_object())
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// $this->field_list[] = $row->Field;
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//
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// return $this->field_list;
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// }
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// };//class SQLTable
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//
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// class SQLConnect
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// {
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// private $sql=null;
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//
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// public function __construct()
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// {
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// $sql=get_sql();
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// }
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//
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// public function OpenTable($table_name)
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// {
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// if(!$sql)
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// return(null);
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//
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// return(new SQLTable($sql,$table));
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// }
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// };//class SQLConnect
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function get_field_list($sql,$table_name)
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{
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if($sql==null)return null;
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$sql_result=$sql->query("DESC ".$table_name);
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if(!$sql_result)
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return null;
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$field_array=array();
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while ($row = $sql_result->fetch_object())
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$field_array[] = $row->Field;
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return $field_array;
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}
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function select_table()//$sql,$table_name,$field_array,$where,$order,$start,$count)
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{
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$sql =func_get_arg(0);
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$table_name =func_get_arg(1);
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$field_array =func_get_arg(2);
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if(func_num_args()>3)$where=func_get_arg(3);else $where=null;
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if(func_num_args()>4)$order=func_get_arg(4);else $order=null;
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if(func_num_args()>5)
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{
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$start=func_get_arg(5);
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$count=func_get_arg(6);
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}
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else
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{
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$start=0;
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$count=0;
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}
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if($sql==null)return;
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$sql_string="SELECT";
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if($field_array==null)
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{
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$sql_string=$sql_string." * FROM ".$table_name;
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}
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else
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{
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for($i=0;$i<count($field_array);$i++)
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if($i==0)
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$sql_string=$sql_string.' '.$field_array[$i];
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else
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$sql_string=$sql_string.','.$field_array[$i];
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$sql_string=$sql_string." FROM ".$table_name;
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}
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if($where!=null&&strlen($where)>3)
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$sql_string=$sql_string." WHERE ".$where;
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if($order!=null&&strlen($order)>3)
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$sql_string=$sql_string." ORDER BY ".$order;
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if($count!=0)$sql_string=$sql_string." LIMIT ".$start.",".$count;
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$sql_result=$sql->query($sql_string);
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if($sql_result)
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return $sql_result;
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echo 'SQL Query error,SQLString: '.$sql_string.'<br/>';
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echo 'SQL Error: '.$sql->error;
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return null;
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}
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function select_table_to_array()//$sql,$table_name,$field_array,$where,$start,$count)
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{
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$sql =func_get_arg(0);
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$table_name =func_get_arg(1);
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$field_array =func_get_arg(2);
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if(func_num_args()>3)$where=func_get_arg(3);
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if(func_num_args()>4)
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{
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$start=func_get_arg(4);
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$count=func_get_arg(5);
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}
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else
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{
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$start=0;
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$count=0;
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}
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$sql_result=select_table($sql,$table_name,$field_array,$where,$start,$count);
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if(!$sql_result)return(null);
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$result=array();
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$index=0;
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while($row=$sql_result->fetch_row())
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{
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$result[$index]=$row;
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$index++;
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}
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$sql_result->close();
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return $result;
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}
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function select_field($sql,$table_name,$field,$where)
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{
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if($sql==null)return;
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$sql_string="SELECT ".$field." FROM ".$table_name." WHERE ".$where;
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$sql_result=$sql->query($sql_string);
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if(!$sql_result)
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return null;
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$row=$sql_result->fetch_object();
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$sql_result->close();
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return $row;
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}
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/**
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* 向一个表中插入数据，使用array的kv模式表示字段和数据
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*/
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function sql_insert()//$sql,$table_name,$data_array)
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{
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$sql=func_get_arg(0);
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if($sql==null)return null;
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$table_name=func_get_arg(1);
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$data_array=func_get_arg(2);
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if(func_num_args()==4)
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$resultmode=func_get_arg(3);
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else
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$resultmode=MYSQLI_STORE_RESULT;
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$sql_string="INSERT INTO ".$table_name." SET";
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$count=0;
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foreach($data_array as $field=>$value)
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{
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if($count==0)
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$sql_string=$sql_string.' '.$field.'="'.$value.'"';
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else
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$sql_string=$sql_string.','.$field.'="'.$value.'"';
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++$count;
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}
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$sql_result=$sql->query($sql_string);
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if($sql_result)
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return $sql_result;
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echo 'SQL Insert error,SQLString: '.$sql_string.'<br/>';
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echo 'SQL Error: '.$sql->error;
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return null;
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}
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/**
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* 向一个表中插入数据，字段数据来自于post
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*/
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function sql_insert_by_post()//$sql,$table_name,$field_array [,$resultmode=MYSQLI_STORE_RESULT])
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{
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$sql=func_get_arg(0);
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if($sql==null)return null;
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$data_array=array();
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$table_name=func_get_arg(1);
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$field_array=func_get_arg(2);
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if(func_num_args()==4)
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$resultmode=func_get_arg(3);
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else
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$resultmode=MYSQLI_STORE_RESULT;
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foreach($field_array as $field)
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{
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if(isset($_POST[$field])&&strlen($_POST[$field])>0)
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$data_array[$field]=$_POST[$field];
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}
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return sql_insert($sql,$table_name,$data_array,$resultmode);
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}
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function sql_update($sql,$table_name,$where,$field_array)
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{
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if(!$sql)return null;
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if(!$where||strlen($where)<3)return null;
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if(!$field_array||!is_array($field_array)||count($field_array)<=0)return null;
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$sql_string='UPDATE '.$table_name.' SET ';
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$first_field=true;
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foreach($field_array as $field=>$value)
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{
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if(!$first_field)
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$sql_string.=',';
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else
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$first_field=false;
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$sql_string.=$field.'="'.$value.'"';
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}
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$sql_string.=" WHERE ".$where;
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// echo 'SQL Update SQLString: '.$sql_string.'<br/>';
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$sql_result=$sql->query($sql_string);
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if($sql_result)
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return $sql_result;
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echo 'SQL Update error,SQLString: '.$sql_string.'<br/>';
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echo 'SQL Error: '.$sql->error;
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return null;
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}
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function sql_update_by_post($sql,$table_name,$where,$field_array)
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{
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if(!$sql)return null;
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if(!$where||strlen($where)<3)return null;
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if(!$field_array||!is_array($field_array)||count($field_array)<=0)return null;
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$data_array=array();
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foreach($field_array as $field)
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{
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if(isset($_POST[$field])&&strlen($_POST[$field])>0)
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$data_array[$field]=$_POST[$field];
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}
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return sql_update($sql,$table_name,$where,$data_array);
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}
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function sql_get_record_count($sql,$table_name,$where)
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{
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if(!$sql)return null;
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$sql_string="select count(*) from ".$table_name;
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if($where)
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$sql_string.=" where ".$where;
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$sql_result=$sql->query($sql_string);
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if(!$sql_result)
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{
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echo 'Query Error,SQLString: '.$sql_string.'<br/>';
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return null;
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}
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$result=$sql_result->fetch_row();
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$sql_result->close();
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return $result[0];
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}
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function sql_get_field_term($sql,$table_name,$field,$term,$where)
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{
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if(!$sql)return null;
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if($where)
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$sql_string="select ".$term."(".$field.") from ".$table_name." where ".$where;
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else
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$sql_string="select ".$term."(".$field.") from ".$table_name;
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$sql_result=$sql->query($sql_string);
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if(!$sql_result)
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{
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echo 'Query Error,SQLString: '.$sql_string.'<br/>';
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return null;
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}
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$result=$sql_result->fetch_row();
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$sql_result->close();
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return $result[0];
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}
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function sql_get_field_min($sql,$table_name,$field,$where)
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{
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return sql_get_field_term($sql,$table_name,$field,"MIN",$where);
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}
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function sql_get_field_max($sql,$table_name,$field,$where)
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{
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return sql_get_field_term($sql,$table_name,$field,"MAX",$where);
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}
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function sql_get_field_count($sql,$table_name,$field,$where)
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{
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return sql_get_field_term($sql,$table_name,$field,"COUNT",$where);
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}
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function sql_get_field_sum($sql,$table_name,$field,$where)
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{
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return sql_get_field_term($sql,$table_name,$field,"SUM",$where);
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}
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function sql_get_field_avg($sql,$table_name,$field,$where)
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{
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return sql_get_field_term($sql,$table_name,$field,"AVG",$where);
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}
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function sql_get_field_distinct($sql,$table_name,$field)
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{
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if(!$sql)return null;
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$sql_result=$sql->query("select DISTINCT(".$field.") from ".$table_name.' ORDER BY '.$field);
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$result=array();
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while($obj=$sql_result->fetch_row())
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array_push($result,$obj[0]);
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$sql_result->close();
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return $result;
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}
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function sql_get_field_count_distinct($sql,$table_name,$field,$where)
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{
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if(!$sql)return null;
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if($where)
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$sql_result=$sql->query("select count(distinct(".$field.")) from ".$table_name." where ".$where);
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else
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$sql_result=$sql->query("select count(distinct(".$field.")) from ".$table_name);
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$result=$sql_result->fetch_row();
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$sql_result->close();
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return $result[0];
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}
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?>
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