php+mysql obtains records in the database (especially the efficient paging function)_PHP tutorial

MySQL(和PHP搭配之最佳组合).php(做为现在的主流开发语言) 获取数据库中的记录，完全个人经验总结，仅供参考！
(做为现在的主流开发语言)
/**
*php(做为现在的主流开发语言)+MySQL(和PHP搭配之最佳组合)数据库基本功能
*http://blog.csdn.net/yown
*/
############################################
#获取序列ID
############################################
function getSequence() {
$sql = "update sequence set id=last_insert_id(id+1);";
$sql2= "select last_insert_id();";

global $dbuser,$dbpass,$host,$database,$printsql;

$link = MySQL(和PHP搭配之最佳组合)_connect($host,$dbuser,$dbpass);
if(! $link){
return MySQL(和PHP搭配之最佳组合)_error();
}

MySQL(和PHP搭配之最佳组合)_select_db($database);
MySQL(和PHP搭配之最佳组合)_query("SET NAMES UTF8");
if($printsql) echo "

---

".$sql."

---

";
MySQL(和PHP搭配之最佳组合)_query($sql);
if($printsql) echo "

---

".$sql2."

---

";
$result = MySQL(和PHP搭配之最佳组合)_query($sql2);

if(MySQL(和PHP搭配之最佳组合)_num_rows($result)==0){
  MySQL(和PHP搭配之最佳组合)_close($link);
  return "";
}
$myrow = MySQL(和PHP搭配之最佳组合)_fetch_row($result);
$ret=$myrow[0];

MySQL(和PHP搭配之最佳组合)_close($link);
return $ret;
}
############################################
#获取strSql第N条记录中的第N列数据,下标从1开始
############################################
function getData($strsql,$row,$col) {
global $dbuser,$dbpass,$host,$database,$printsql;

$link = MySQL(和PHP搭配之最佳组合)_connect($host,$dbuser,$dbpass);
if(! $link){
  return MySQL(和PHP搭配之最佳组合)_error();
}

MySQL(和PHP搭配之最佳组合)_select_db($database);
MySQL(和PHP搭配之最佳组合)_query("SET NAMES UTF8");
if($printsql) echo "

---

".$strsql."

---

";
$result = MySQL(和PHP搭配之最佳组合)_query($strsql);

if(MySQL(和PHP搭配之最佳组合)_num_rows($result)==0){
  MySQL(和PHP搭配之最佳组合)_close($link);
  return "";
}
$i=0;
while($myrow = MySQL(和PHP搭配之最佳组合)_fetch_row($result)){

   if($i==$row-1){
      $ret=$myrow[$col-1];
      break;
   }
   $i=$i+1;
}

MySQL(和PHP搭配之最佳组合)_close($link);
return $ret;

}

############################################
#获取strSql第N条记录
############################################
function getRowData($strsql,$row) {
global $dbuser,$dbpass,$host,$database,$printsql;

$link = MySQL(和PHP搭配之最佳组合)_connect($host,$dbuser,$dbpass);
if(! $link){
  return MySQL(和PHP搭配之最佳组合)_error();
}

MySQL(和PHP搭配之最佳组合)_select_db($database);
MySQL(和PHP搭配之最佳组合)_query("SET NAMES UTF8");
if($printsql) echo "

---

".$strsql."

---

";
$result = MySQL(和PHP搭配之最佳组合)_query($strsql);

if(MySQL(和PHP搭配之最佳组合)_num_rows($result)==0){
  MySQL(和PHP搭配之最佳组合)_close($link);
  return "";
}
$i=0;
while($myrow = MySQL(和PHP搭配之最佳组合)_fetch_array($result)){

if($i==$row-1){
$ret=$myrow;
break;
}
$i=$i+1;
}

MySQL(The best combination with PHP)_close($link);
return $ret;

}

#### ######################################
#Get the strSql record set and save it In array
##########################################
function getResultSetData($strsql) {
global $dbuser,$dbpass,$host,$database,$printsql;

$link = MySQL(the best combination with PHP) _connect($host,$dbuser,$dbpass);
if(! $link){
return MySQL(The best combination with PHP)_error();
}

MySQL(The best combination with PHP)_select_db($database);
MySQL(The best combination with PHP) _query("SET NAMES UTF8");
if($printsql) echo "

---

".$strsql."

---

";
$result = MySQL( The best combination with PHP)_query($strsql);

if(MySQL(The best combination with PHP)_num_rows($result)==0) {
MySQL(The best combination with PHP)_close($link);
return "";
}

while($myrow = MySQL(The best combination with PHP)_fetch_array($result)){
$ret[]=$myrow;
}

MySQL(With PHP The best combination)_close($link);
return $ret;
}

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