PHP 面向对象的mysql数据库操作类功能实例

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经测试代码如下：

<?php
/**
 * mysql数据库操作类
 *
 * @param 
 * @arrange (512.笔记) www.q1010.com
 **/
class database {

var $host = NULL;
var $username = NULL;
var $password = NULL;
var $databaseName = NULL;
var $link = NULL;
var $queries = NULL;
var $errors = NULL;

var $databaseExtras = NULL;

function __construct($host, $username, $password, $database) {
$this->database($host, $username, $password, $database);
}

function database($host, $username, $password, $database) {
/*$this->database = array (
"host" => $host,
"username" => $username,
"password" => $password,
"database" => $database,
"link" => "",
"queries" => array (),
"errors" => array ()
);*/

$this->host = $host;
$this->username = $username;
$this->password = $password;
$this->databaseName = $database;
$this->link = "";
$this->queries = array ();
$this->errors = array ();

$this->databaseExtras = new stdClass;

$this->link = mysql_connect($this->host, $this->username, $this->password) or die("Could not connect to Database");
mysql_select_db($this->databaseName);
}

function justquery($sql) {
$this->queries[] = $sql;
return mysql_query($sql, $this->link);
}

function loadResult($sql) {
if (!($cur = $this->justquery($sql))) {
return null;
}
$ret = null;
if ($row = mysql_fetch_row( $cur )) {
$ret = $row[0];
}
mysql_free_result( $cur );
return $ret;
}

function loadFirstRow($sql) {
if (!($cur = $this->justquery($sql))) {
return null;
}
$ret = null;
if ($row = mysql_fetch_object( $cur )) {
$ret = $row;
}
mysql_free_result( $cur );
return $ret;
}

function insertid() {
return mysql_insert_id( $this->link );
}

function query($sql, $key = "", $returns = true, $batch = false) {
$result = array ();

switch ($batch) {
default:
case true:
foreach ($sql as $index => $query) {
$this->queries[] = $query;
$answer = mysql_query($query, $this->link);

if (!$answer) {
$this->errors[] = mysql_error($this->link);
}
else {
if ($returns != false) {
if (mysql_num_rows($answer) > 0){
while ($row = mysql_fetch_object($answer)) {
if ($key != ""){
$result[$index][$row->$key] = $row;
}
else {
$result[$index][] = $row;
}
}
} else {}
} else {}
}
}
break;

case false:
$this->queries[] = $sql;
$answer = mysql_query($sql, $this->link);

if (!$answer) {
$this->errors[] = mysql_error($this->link);
$result = false;
}
else {
if ($returns != false) {
if (mysql_num_rows($answer) > 0){
while ($row = mysql_fetch_object($answer)) {
if ($key != ""){
$result[$row->$key] = $row;
}
else {
$result[] = $row;
}
}
} else {}
}
else {
$result = true;
}
}
break;
}

return $result;
}

function loadObject( $sql, &$object ) {
if ($object != null) {
if (!($cur = $this->justquery($sql))) {
return false;
} else {}
if ($array = mysql_fetch_assoc( $cur )) {
mysql_free_result( $cur );
$this->bindArrayToObject( $array, $object);
return true;
}
else {
return false;
}
}
else {
if ($cur = $this->justquery($sql)) {
if ($object = mysql_fetch_object( $cur )) {
mysql_free_result( $cur );
return true;
}
else {
$object = null;
return false;
}
}
else {
return false;
}
}
}

function bindArrayToObject( $array, &$obj) {
if (!is_array( $array ) || !is_object( $obj )) {
return (false);
}

foreach (get_object_vars($obj) as $k => $v) {
if( substr( $k, 0, 1 ) != '_' ) {
$ak = $k;
if (isset($array[$ak])) {
$obj->$k = $array[$ak];
}
}
}

return true;
}

function formatCSVCell($data) {
$useQuotes = false;

$quotable = array (
"\"" => "\"\"",
"," => ",",
"\n" => "\n"
);

foreach ($quotable as $char => $repl) {
if (eregi($char, $data)) {
$useQuotes = true;
} else {}
}

if ($useQuotes == true) {
foreach ($quotable as $char => $repl) {
$data = str_replace($char, $repl, $data);
}

$data = "\"" . $data . "\"";
}
else {

}

return $data;
}
}

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关键词：数据库操作