//procedural&style
$mysqli&=&&mysqli_connect('host','username','password','database_name');
//object&oriented&style&(recommended)
$mysqli&=&new&mysqli('host','username','password','database_name');
推荐下面的方式
//Open&a&new&connection&to&the&MySQL&server
$mysqli&=&new&mysqli('host','username','password','database_name');
//Output&any&connection&error
if&($mysqli-&connect_error)&{
&&&&die('Error&:&('.&$mysqli-&connect_errno&.')&'.&$mysqli-&connect_error);
2.选择多行
mysqli_fetch_assoc()&: Below is the code to fetch multiple records as an associative array. The returned array holds the strings fetched from database, where the column names will be the key used to access the internal data. As you can see below, data is displayed in an HTML table.
//Open&a&new&connection&to&the&MySQL&server
$mysqli&=&new&mysqli('host','username','password','database_name');
//Output&any&connection&error
if&($mysqli-&connect_error)&{
&&&&die('Error&:&('.&$mysqli-&connect_errno&.')&'.&$mysqli-&connect_error);
//MySqli&Select&Query
$results&=&$mysqli-&query("SELECT&id,&product_code,&product_desc,&price&FROM&products");
print&'&table&border="1"&';
while($row&=&$results-&fetch_assoc())&{
&&&&print&'&tr&';
&&&&print&'&td&'.$row["id"].'&/td&';
&&&&print&'&td&'.$row["product_code"].'&/td&';
&&&&print&'&td&'.$row["product_name"].'&/td&';
&&&&print&'&td&'.$row["product_desc"].'&/td&';
&&&&print&'&td&'.$row["price"].'&/td&';
&&&&print&'&/tr&';
print&'&/table&';
//&Frees&the&memory&associated&with&a&result
$results-&free();
//&close&connection&
$mysqli-&close();
fetch_array()&: Function returns an array of both&&and&&merged together, it is an extended version of the mysqli_fetch_row() function and both numeric and string can be used as keys to access the data.
//Open&a&new&connection&to&the&MySQL&server
$mysqli&=&new&mysqli('host','username','password','database_name');
//Output&any&connection&error
if&($mysqli-&connect_error)&{
&&&&die('Error&:&('.&$mysqli-&connect_errno&.')&'.&$mysqli-&connect_error);
//MySqli&Select&Query
$results&=&$mysqli-&query("SELECT&id,&product_code,&product_desc,&price&FROM&products");
print&'&table&border="1"';
while($row&=&$results-&fetch_array())&{
&&&&print&'&tr&';
&&&&print&'&td&'.$row["id"].'&/td&';
&&&&print&'&td&'.$row["product_code"].'&/td&';
&&&&print&'&td&'.$row["product_name"].'&/td&';
&&&&print&'&td&'.$row["product_desc"].'&/td&';
&&&&print&'&td&'.$row["price"].'&/td&';
&&&&print&'&/tr&';
print&'&/table&';
//&Frees&the&memory&associated&with&a&result
$results-&free();
//&close&connection&
$mysqli-&close();
fetch_object()&: To fetch database result set as an objects, just use MySqli fetch_object(). The attributes of the object represent the names of the fields found within the result set.
//Open&a&new&connection&to&the&MySQL&server
$mysqli&=&new&mysqli('host','username','password','database_name');
//Output&any&connection&error
if&($mysqli-&connect_error)&{
&&&&die('Error&:&('.&$mysqli-&connect_errno&.')&'.&$mysqli-&connect_error);
//MySqli&Select&Query
$results&=&$mysqli-&query("SELECT&id,&product_code,&product_desc,&price&FROM&products");
print&'&table&border="1"&';
while($row&=&$results-&fetch_object())&{
&&&&print&'&tr&';
&&&&print&'&td&'.$row-&id.'&/td&';
&&&&print&'&td&'.$row-&product_code.'&/td&';
&&&&print&'&td&'.$row-&product_name.'&/td&';
&&&&print&'&td&'.$row-&product_desc.'&/td&';
&&&&print&'&td&'.$row-&price.'&/td&';
&&&&print&'&/tr&';
print&'&/table&';
//&close&connection&
$mysqli-&close();
5.选择单行
//Open&a&new&connection&to&the&MySQL&server
$mysqli&=&new&mysqli('host','username','password','database_name');
//Output&any&connection&error
if&($mysqli-&connect_error)&{
&&&&die('Error&:&('.&$mysqli-&connect_errno&.')&'.&$mysqli-&connect_error);
//chained&PHP&functions
$product_name&=&$mysqli-&query("SELECT&product_name&FROM&products&WHERE&id&=&1")-&fetch_object()-&product_&
print&$product_name;&//output&value
$mysqli-&close();
6.选择行数
//Open&a&new&connection&to&the&MySQL&server
$mysqli&=&new&mysqli('host','username','password','database_name');
//Output&any&connection&error
if&($mysqli-&connect_error)&{
&&&&die('Error&:&('.&$mysqli-&connect_errno&.')&'.&$mysqli-&connect_error);
//get&total&number&of&records
$results&=&$mysqli-&query("SELECT&COUNT(*)&FROM&users");
$get_total_rows&=&$results-&fetch_row();&//hold&total&records&in&variable
$mysqli-&close();
7.选择预处理
$search_product&=&"PD1001";&//product&id
//create&a&prepared&statement
$query&=&"SELECT&id,&product_code,&product_desc,&price&FROM&products&WHERE&product_code=?";
$statement&=&$mysqli-&prepare($query);
//bind¶meters&for&markers,&where&(s&=&string,&i&=&integer,&d&=&double,&&b&=&blob)
$statement-&bind_param('s',&$search_product);
//execute&query
$statement-&execute();
//bind&result&variables
$statement-&bind_result($id,&$product_code,&$product_desc,&$price);
print&'&table&border="1"&';
//fetch&records
while($statement-&fetch())&{
&&&&print&'&tr&';
&&&&print&'&td&'.$id.'&/td&';
&&&&print&'&td&'.$product_code.'&/td&';
&&&&print&'&td&'.$product_desc.'&/td&';
&&&&print&'&td&'.$price.'&/td&';
&&&&print&'&/tr&';
print&'&/table&';
//close&connection
$statement-&close();
$search_ID&=&1;&
$search_product&=&"PD1001";&
$query&=&"SELECT&id,&product_code,&product_desc,&price&FROM&products&WHERE&ID=?&AND&product_code=?";
$statement&=&$mysqli-&prepare($query);
$statement-&bind_param('is',&$search_ID,&$search_product);
$statement-&execute();
$statement-&bind_result($id,&$product_code,&$product_desc,&$price);
print&'&table&border="1"&';
while($statement-&fetch())&{
&&&&print&'&tr&';
&&&&print&'&td&'.$id.'&/td&';
&&&&print&'&td&'.$product_code.'&/td&';
&&&&print&'&td&'.$product_desc.'&/td&';
&&&&print&'&td&'.$price.'&/td&';
&&&&print&'&/tr&';
print&'&/table&';
//close&connection
$statement-&close();
8.插入数据库
//values&to&be&inserted&in&database&table
$product_code&=&'"'.$mysqli-&real_escape_string('P1234').'"';
$product_name&=&'"'.$mysqli-&real_escape_string('42&inch&TV').'"';
$product_price&=&'"'.$mysqli-&real_escape_string('600').'"';
//MySqli&Insert&Query
$insert_row&=&$mysqli-&query("INSERT&INTO&products&(product_code,&product_name,&price)&VALUES($product_code,&$product_name,&$product_price)");
if($insert_row){
&&&&print&'Success!&ID&of&last&inserted&record&is&:&'&.$mysqli-&insert_id&.'&br&/&';&
&&&&die('Error&:&('.&$mysqli-&errno&.')&'.&$mysqli-&error);
9.插入预处理
//values&to&be&inserted&in&database&table
$product_code&=&'P1234';
$product_name&=&'42&inch&TV';
$product_price&=&'600';
$query&=&"INSERT&INTO&products&(product_code,&product_name,&price)&VALUES(?,&?,&?)";
$statement&=&$mysqli-&prepare($query);
//bind¶meters&for&markers,&where&(s&=&string,&i&=&integer,&d&=&double,&&b&=&blob)
$statement-&bind_param('sss',&$product_code,&$product_name,&$product_price);
if($statement-&execute()){
&&&&print&'Success!&ID&of&last&inserted&record&is&:&'&.$statement-&insert_id&.'&br&/&';&
&&&&die('Error&:&('.&$mysqli-&errno&.')&'.&$mysqli-&error);
$statement-&close();
10.批量插入
//product&1
$product_code1&=&'"'.$mysqli-&real_escape_string('P1').'"';
$product_name1&=&'"'.$mysqli-&real_escape_string('Google&Nexus').'"';
$product_price1&=&'"'.$mysqli-&real_escape_string('149').'"';
//product&2
$product_code2&=&'"'.$mysqli-&real_escape_string('P2').'"';
$product_name2&=&'"'.$mysqli-&real_escape_string('Apple&iPad&2').'"';
$product_price2&=&'"'.$mysqli-&real_escape_string('217').'"';
//product&3
$product_code3&=&'"'.$mysqli-&real_escape_string('P3').'"';
$product_name3&=&'"'.$mysqli-&real_escape_string('Samsung&Galaxy&Note').'"';
$product_price3&=&'"'.$mysqli-&real_escape_string('259').'"';
//Insert&multiple&rows
$insert&=&$mysqli-&query("INSERT&INTO&products(product_code,&product_name,&price)&VALUES
($product_code1,&$product_name1,&$product_price1),
($product_code2,&$product_name2,&$product_price2),
($product_code3,&$product_name3,&$product_price3)");
if($insert){
&&&&//return&total&inserted&records&using&mysqli_affected_rows
&&&&print&'Success!&Total&'&.$mysqli-&affected_rows&.'&rows&added.&br&/&';&
&&&&die('Error&:&('.&$mysqli-&errno&.')&'.&$mysqli-&error);
11.更新删除
//MySqli&Update&Query
$results&=&$mysqli-&query("UPDATE&products&SET&product_name='52&inch&TV',&product_code='323343'&WHERE&ID=24");
//MySqli&Delete&Query
//$results&=&$mysqli-&query("DELETE&FROM&products&WHERE&ID=24");
if($results){
&&&&print&'Success!&record&updated&/&deleted';&
&&&&print&'Error&:&('.&$mysqli-&errno&.')&'.&$mysqli-&
$product_name&=&'52&inch&TV';
$product_code&=&'9879798';
$find_id&=&24;
$query&=&"UPDATE&products&SET&product_name=?,&product_code=?&WHERE&ID=?";
$statement&=&$mysqli-&prepare($query);
//bind¶meters&for&markers,&where&(s&=&string,&i&=&integer,&d&=&double,&&b&=&blob)
$results&=&&$statement-&bind_param('ssi',&$product_name,&$product_code,&$find_id);
if($results){
&&&&print&'Success!&record&updated';&
&&&&print&'Error&:&('.&$mysqli-&errno&.')&'.&$mysqli-&
//MySqli&Delete&Query
$results&=&$mysqli-&query("DELETE&FROM&products&WHERE&added_timestamp&&&(NOW()&-&INTERVAL&1&DAY)");
if($results){
&&&&print&'Success!&deleted&one&day&old&records';&
&&&&print&'Error&:&('.&$mysqli-&errno&.')&'.&$mysqli-&
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/bin/sh /home/php-5.5.30/ext/mysqli/libtool --mode=compile cc&&-I. -I/home/php-5.5.30/ext/mysqli -DPHP_ATOM_INC -I/home/php-5.5.30/ext/mysqli/include -I/home/php-5.5.30/ext/mysqli/main -I/home/php-5.5.30/ext/mysqli -I/usr/local/php/include/php -I/usr/local/php/include/php/main -I/usr/local/php/include/php/TSRM -I/usr/local/php/include/php/Zend -I/usr/local/php/include/php/ext -I/usr/local/php/include/php/ext/date/lib -I/usr/local/mysql/include/mysql&&-DHAVE_CONFIG_H&&-g -O2& &-c /home/php-5.5.30/ext/mysqli/mysqli.c -o mysqli.lo
cc -I. -I/home/php-5.5.30/ext/mysqli -DPHP_ATOM_INC -I/home/php-5.5.30/ext/mysqli/include -I/home/php-5.5.30/ext/mysqli/main -I/home/php-5.5.30/ext/mysqli -I/usr/local/php/include/php -I/usr/local/php/include/php/main -I/usr/local/php/include/php/TSRM -I/usr/local/php/include/php/Zend -I/usr/local/php/include/php/ext -I/usr/local/php/include/php/ext/date/lib -I/usr/local/mysql/include/mysql -DHAVE_CONFIG_H -g -O2 -c /home/php-5.5.30/ext/mysqli/mysqli.c&&-fPIC -DPIC -o .libs/mysqli.o
In file included from /usr/local/mysql/include/mysql/my_global.h:86,
& && && && && &&&from /home/php-5.5.30/ext/mysqli/php_mysqli_structs.h:63,
& && && && && &&&from /home/php-5.5.30/ext/mysqli/mysqli.c:34:
/usr/local/mysql/include/mysql/my_config.h:1173:1: warning: &PACKAGE_NAME& redefined
In file included from /home/php-5.5.30/ext/mysqli/mysqli.c:24:
/home/php-5.5.30/ext/mysqli/config.h:56:1: warning: this is the location of the previous definition
In file included from /usr/local/mysql/include/mysql/my_global.h:86,
& && && && && &&&from /home/php-5.5.30/ext/mysqli/php_mysqli_structs.h:63,
& && && && && &&&from /home/php-5.5.30/ext/mysqli/mysqli.c:34:
/usr/local/mysql/include/mysql/my_config.h:1176:1: warning: &PACKAGE_STRING& redefined
In file included from /home/php-5.5.30/ext/mysqli/mysqli.c:24:
/home/php-5.5.30/ext/mysqli/config.h:59:1: warning: this is the location of the previous definition
In file included from /usr/local/mysql/include/mysql/my_global.h:86,
& && && && && &&&from /home/php-5.5.30/ext/mysqli/php_mysqli_structs.h:63,
& && && && && &&&from /home/php-5.5.30/ext/mysqli/mysqli.c:34:
/usr/local/mysql/include/mysql/my_config.h:1179:1: warning: &PACKAGE_TARNAME& redefined
In file included from /home/php-5.5.30/ext/mysqli/mysqli.c:24:
/home/php-5.5.30/ext/mysqli/config.h:62:1: warning: this is the location of the previous definition
In file included from /usr/local/mysql/include/mysql/my_global.h:86,
& && && && && &&&from /home/php-5.5.30/ext/mysqli/php_mysqli_structs.h:63,
& && && && && &&&from /home/php-5.5.30/ext/mysqli/mysqli.c:34:
/usr/local/mysql/include/mysql/my_config.h:1182:1: warning: &PACKAGE_VERSION& redefined
In file included from /home/php-5.5.30/ext/mysqli/mysqli.c:24:
/home/php-5.5.30/ext/mysqli/config.h:65:1: warning: this is the location of the previous definition
/home/php-5.5.30/ext/mysqli/mysqli.c:321: error: expected ';', ',' or ')' before '*' token
/home/php-5.5.30/ext/mysqli/mysqli.c:364: error: expected ';', ',' or ')' before '*' token
/home/php-5.5.30/ext/mysqli/mysqli.c:413: error: expected ';', ',' or ')' before '*' token
/home/php-5.5.30/ext/mysqli/mysqli.c: In function 'mysqli_object_get_debug_info':
/home/php-5.5.30/ext/mysqli/mysqli.c:473: warning: assignment makes pointer from integer without a cast
/home/php-5.5.30/ext/mysqli/mysqli.c: In function 'zm_startup_mysqli':
/home/php-5.5.30/ext/mysqli/mysqli.c:624: error: 'mysqli_read_property' undeclared (first use in this function)
/home/php-5.5.30/ext/mysqli/mysqli.c:624: error: (Each undeclared identifier is reported only once
/home/php-5.5.30/ext/mysqli/mysqli.c:624: error: for each function it appears in.)
/home/php-5.5.30/ext/mysqli/mysqli.c:625: error: 'mysqli_write_property' undeclared (first use in this function)
/home/php-5.5.30/ext/mysqli/mysqli.c:627: error: 'mysqli_object_has_property' undeclared (first use in this function)
make: *** [mysqli.lo] Error 1
请问怎么解决 ，网上的方法都试过了，没用。
& |& & |& & |& & |& 
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可能没安装mysql的头文件（mysql-devel），安装这个（yum -y install mysql-devel）后再重试下。
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还是这样的错误，这个之前装过mysql-devel了， 各位大神都没碰到过么？&&
./configure --prefix=/usr/local/mysqli \
--with-php-config=/usr/local/php/bin/php-config \
--with-mysqli=/usr/local/mysql/bin/mysql_config&&
编译安装没有问题，提示是这样
。。。。。。
creating libtool
appending configuration tag &CXX& to libtool
configure: creating ./config.status
config.status: creating config.h
config.status: config.h is unchanged
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本帖最后由 ccjsj1 于
10:37 编辑
没遇到过这样的问题，不能yum安装吗？
像是版本不兼容问题导致，介绍下系统版本、php版本、mysql版本、安装方法，看这边是否有环境试下。PHP程序员最常犯的11个MySQL错误 | 程序师mysqli_error
mysqli_error — Returns a string description of the last error
Procedural style:
string mysqli_error
( mysqli $link
Object oriented style (property)
string$error;
Returns the last error message for the most recent MySQLi function call
that can succeed or fail.
Procedural style only: A link identifier
returned by
A string that describes the error. An empty string if no error occurred.
Example#1 Object oriented style
&?php$mysqli&=&new&mysqli("localhost",&"my_user",&"my_password",&"world");/*&check&connection&*/if&(mysqli_connect_errno())&{&&&&printf("Connect&failed:&%s\n",&mysqli_connect_error());&&&&exit();}if&(!$mysqli-&query("SET&a=1"))&{&&&&printf("Errormessage:&%s\n",&$mysqli-&error);}/*&close&connection&*/$mysqli-&close();?&
Example#2 Procedural style
&?php$link&=&mysqli_connect("localhost",&"my_user",&"my_password",&"world");/*&check&connection&*/if&(mysqli_connect_errno())&{&&&&printf("Connect&failed:&%s\n",&mysqli_connect_error());&&&&exit();}if&(!mysqli_query($link,&"SET&a=1"))&{&&&&printf("Errormessage:&%s\n",&mysqli_error($link));}/*&close&connection&*/mysqli_close($link);?&
上例将输出：
Errormessage: Unknown system variable 'a'
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Last updated: Tue Jul 26 01:41:43 2011 UTC13:09 提问
PHP配置问题(mysql_connect)报错
之前因为比较懒，就装了PHPnow,PHP版本是5.2,最近因为要学thinkPHP框架，由于用的是thinkPHP3.2，需要PHP5.3以上版本才能跑起来，就手动更新了PHP版本，更新到了5.3.5，并按照正常步骤配置了php.ini文件，打开了(extension_dir = "\ext"
extension=php_mysql.
extension=php_mysqli.)等模块，重启Apache，运行了一下之前写的练手项目，但只要和数据库连接有关的，都报了如下这个错误（Fatal error: Call to undefined function mysql_connect() in E:\php\htdocs\wangshangshudian\login.php on line 7），但是我都把php.ini相应和MySQL有关的模块都打开了，怎么还是这个问题呢，我就郁闷了，望各位大神帮忙看下是哪出错了，并且thinkPHP也出现了如下错误：:(
系统不支持:mysql
FILE: E:\php\htdocs\demo\ThinkPHP\Library\Think\Db\Driver\Mysql.class.php LINE: 27
#0 E:\php\htdocs\demo\ThinkPHP\Library\Think\Db\Driver\Mysql.class.php(27): E('???????????????...')
#1 E:\php\htdocs\demo\ThinkPHP\Library\Think\Db.class.php(90): Think\Db\Driver\Mysql-&construct(Array)
#2 E:\php\htdocs\demo\ThinkPHP\Library\Think\Db.class.php(65): Think\Db-&factory('')
#3 E:\php\htdocs\demo\ThinkPHP\Library\Think\Model.class.php(1287): Think\Db::getInstance('')
#4 E:\php\htdocs\demo\ThinkPHP\Library\Think\Model.class.php(95): Think\Model-&db(0, '', true)
#5 E:\php\htdocs\demo\ThinkPHP\Common\functions.php(554): Think\Model-&construct('user', '', '')
#6 E:\php\htdocs\demo\Application\Home\Controller\DBController.class.php(6): M('user')
#7 [internal function]: Home\Controller\DBController-&index()
#8 E:\php\htdocs\demo\ThinkPHP\Library\Think\App.class.php(155): ReflectionMethod-&invoke(Object(Home\Controller\DBController))
#9 E:\php\htdocs\demo\ThinkPHP\Library\Think\App.class.php(193): Think\App::exec()
#10 E:\php\htdocs\demo\ThinkPHP\Library\Think\Think.class.php(120): Think\App::run()
#11 E:\php\htdocs\demo\ThinkPHP\ThinkPHP.php(96): Think\Think::start()
#12 E:\php\htdocs\demo\index.php(24): require('E:\php\htdocs\d...')
#13 {main}
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重新重头再看了一遍安装的过程，自己发现了两处配置错误：
1.忘记将libmysql.dll至windows目录下的system32下
2.(最重要的错误)由于更新PHP版本之后，忘记修改了Apache文件下的conf下的http.conf中的PHPINDir "../"，
将其PHPINDir的目录修改为更新后的PHP的版本目录，再重启Apache后，原来出现的这个错误（Fatal error: Call to undefined function mysql_connect() in E:\php\htdocs\wangshangshudian\login.php on line 7）不在出现了，连接MySQL数据库正常
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