Php+mysql getting records in a database (especially efficient paging) _php tutorial

MySQL (the best combination with PHP). PHP (as the current mainstream development language) to get the records in the database, complete personal experience Summary, for reference only!
/**
*php (as the current mainstream development language) +mysql (and PHP collocation of the best combination) database basic functions
*http://blog.csdn.net/yown
*/
############################################
#获取序列ID
############################################
function Getsequence () {
$sql = "Update sequence set id=last_insert_id (id+1);";
$sql 2= "Select last_insert_id ();";

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

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

MySQL (the best combination of PHP collocation) _select_db ($database);
MySQL (and PHP collocation of the best combination) _query ("SET NAMES UTF8");
if ($printsql) echo "

". $sql." ";
MySQL (the best combination of PHP collocation) _query ($sql);
if ($printsql) echo " ". $sql 2." ";
$result = MySQL (the best combination of PHP collocation) _query ($sql 2);

if (the best combination of MySQL (and PHP collocation) _num_rows ($result) ==0) {
MySQL (the best combination of PHP collocation) _close ($link);
Return "";
}
$myrow = MySQL (the best combination of PHP collocation) _fetch_row ($result);
$ret = $myrow [0];

MySQL (the best combination of PHP collocation) _close ($link);
return $ret;
}
############################################
#获取strSql第N条记录中的第N列数据, subscript starting from 1
############################################
function GetData ($strsql, $row, $col) {
Global $dbuser, $dbpass, $host, $database, $printsql;

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

MySQL (the best combination of PHP collocation) _select_db ($database);
MySQL (and PHP collocation of the best combination) _query ("SET NAMES UTF8");
if ($printsql) echo "

". $strsql." ";
$result = MySQL (the best combination of PHP collocation) _query ($strsql);

if (the best combination of MySQL (and PHP collocation) _num_rows ($result) ==0) {
MySQL (the best combination of PHP collocation) _close ($link);
Return "";
}
$i = 0;
while ($myrow = MySQL (best combination with PHP) _fetch_row ($result)) {

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

MySQL (the best combination of PHP collocation) _close ($link);
return $ret;

}

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

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

MySQL (the best combination of PHP collocation) _select_db ($database);
MySQL (and PHP collocation of the best combination) _query ("SET NAMES UTF8");
if ($printsql) echo "

". $strsql." ";
$result = MySQL (the best combination of PHP collocation) _query ($strsql);

if (the best combination of MySQL (and PHP collocation) _num_rows ($result) ==0) {
MySQL (the best combination of PHP collocation) _close ($link);
Return "";
}
$i = 0;
while ($myrow = MySQL (best combination with PHP) _fetch_array ($result)) {

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

MySQL (the best combination of PHP collocation) _close ($link);
return $ret;

}

############################################
#获取strSql记录集存入数组中
############################################
function Getresultsetdata ($strsql) {
Global $dbuser, $dbpass, $host, $database, $printsql;

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

MySQL (the best combination of PHP collocation) _select_db ($database);
MySQL (and PHP collocation of the best combination) _query ("SET NAMES UTF8");
if ($printsql) echo "

". $strsql." ";
$result = MySQL (the best combination of PHP collocation) _query ($strsql);

if (the best combination of MySQL (and PHP collocation) _num_rows ($result) ==0) {
MySQL (the best combination of PHP collocation) _close ($link);
Return "";
}

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

MySQL (the best combination of PHP collocation) _close ($link);
return $ret;
}

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