Home php教程 php手册 php调用方法mssql_fetch_row、mssql_fetch_array、mssql_fetch_assoc和m

php调用方法mssql_fetch_row、mssql_fetch_array、mssql_fetch_assoc和m

Jun 13, 2016 am 11:59 AM
array fetch mssql php the difference and data method of read transfer

方法名:mssql_fetch_row()

测试:

复制代码 代码如下:


require 'dbconn.php';
$sql = 'select * from _Test';
$query = mssql_query($sql);
while($row=mssql_fetch_row($query))
{
echo $row['UserId'].'::'.$row[1].'
';
}


返回:

Notice: Undefined index: UserId in D:/_PHP_Test/Test2/test_connLocalDB.php on line 32 ::王小一
Notice: Undefined index: UserId in D:/_PHP_Test/Test2/test_connLocalDB.php on line 32 ::王小二
Notice: Undefined index: UserId in D:/_PHP_Test/Test2/test_connLocalDB.php on line 32 ::王小三
Notice: Undefined index: UserId in D:/_PHP_Test/Test2/test_connLocalDB.php on line 32 ::王小四
Notice: Undefined index: UserId in D:/_PHP_Test/Test2/test_connLocalDB.php on line 32 ::王小五

分析:

mssql_fetch_row(),和用mssql_fetch_array()加上第二个可选参数 MYSQL_NUM 完全相同。从和指定的结果标识关联的结果集中取得一行数据并作为数组返回。每个结果的列储存在一个数组的单元中,偏移量从 0 开始。 注意,这里是从0开始偏移,不能用key值(字段名)来取值,只能用索引来取值。因此,这里使用$row['key值']无法取到值。

方法名: mssql_fetch_assoc()

测试:

复制代码 代码如下:


$query = mssql_query($sql);
while($row=mssql_fetch_assoc($query))
{
echo $row['UserId'].'::'.$row[1].'
';
}


返回:

Notice: Undefined offset: 1 in D:/_PHP_Test/Test2/test_connLocalDB.php on line 43 1::
Notice: Undefined offset: 1 in D:/_PHP_Test/Test2/test_connLocalDB.php on line 43 2::
Notice: Undefined offset: 1 in D:/_PHP_Test/Test2/test_connLocalDB.php on line 43 3::
Notice: Undefined offset: 1 in D:/_PHP_Test/Test2/test_connLocalDB.php on line 43 4::
Notice: Undefined offset: 1 in D:/_PHP_Test/Test2/test_connLocalDB.php on line 43 5::
分析:
mssql_fetch_assoc() 和用mssql_fetch_array()加上第二个可选参数 MYSQL_ASSOC 完全相同。它仅仅返回关联数组。这也是 mssql_fetch_array()起初始的工作方式。因此用$row[索引值]无法取到值。

方法名: mssql_fetch_array()

测试:

复制代码 代码如下:


$query = mssql_query($sql);
while($row=mssql_fetch_array($query))
{
echo $row['UserId'].'::'.$row[1].'
';
}
?>



返回:
1::王小一
2::王小二
3::王小三
4::王小四
5::王小五

分析:
mssql_fetch_array(),是mssql_fetch_row()的扩展版本。除了将数据以数字索引方式储存在数组中之外,还可以将数据作为关联索引储存,用字段名作为键名。 因此这里使用$row['key值']和$row[索引值]皆可以取到值。

mssql_fetch_array() 中第二个参数result_type (这是一个常量)为可选参数,取值范围为:MYSQL_ASSOC ,MYSQL_NUM 和 MYSQL_BOTH 。其中:
mssql_fetch_array($query, MYSQL_ASSOC) == mssql_fetch_assoc($query);
mssql_fetch_array($query, MYSQL_NUM) == mssql_fetch_row($query);
所以mssql_fetch_array()函数在某种程度上可以算是mssql_fetch_row()与 mssql_fetch_assoc ()的集合。因此,mssql_fetch_array()另外还有MYSQL_BOTH参数,将得到一个同时包含关 联和数字索引的数组。

方法名: mssql_fetch_object()

测试:

复制代码 代码如下:


$query=mssql_query($sql);
while($row=mssql_fetch_object($query))
{
echo $row->UserId.'::'.$row->CreateTime."
";
}


返回:
1::06 7 2011 4:46PM
2::06 7 2011 4:46PM
3::06 7 2011 4:46PM
4::06 7 2011 4:46PM
5::06 7 2011 4:46PM

分析:

mysql_fetch_object() 和 mssql_fetch_array类似,只有一点区别,即返回一个对象而不是数组,并将字段名字做为属性。间接地也意味着只能通过字段名来访问,而不是偏移量。
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

What are the basic requirements for c language functions What are the basic requirements for c language functions Apr 03, 2025 pm 10:06 PM

C language functions are the basis for code modularization and program building. They consist of declarations (function headers) and definitions (function bodies). C language uses values ​​to pass parameters by default, but external variables can also be modified using address pass. Functions can have or have no return value, and the return value type must be consistent with the declaration. Function naming should be clear and easy to understand, using camel or underscore nomenclature. Follow the single responsibility principle and keep the function simplicity to improve maintainability and readability.

Explain the match expression (PHP 8 ) and how it differs from switch. Explain the match expression (PHP 8 ) and how it differs from switch. Apr 06, 2025 am 12:03 AM

In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.

What are the differences and connections between c and c#? What are the differences and connections between c and c#? Apr 03, 2025 pm 10:36 PM

Although C and C# have similarities, they are completely different: C is a process-oriented, manual memory management, and platform-dependent language used for system programming; C# is an object-oriented, garbage collection, and platform-independent language used for desktop, web application and game development.

How to use XPath to search from a specified DOM node in JavaScript? How to use XPath to search from a specified DOM node in JavaScript? Apr 04, 2025 pm 11:15 PM

Detailed explanation of XPath search method under DOM nodes In JavaScript, we often need to find specific nodes from the DOM tree based on XPath expressions. If you need to...

What is Cross-Site Request Forgery (CSRF) and how do you implement CSRF protection in PHP? What is Cross-Site Request Forgery (CSRF) and how do you implement CSRF protection in PHP? Apr 07, 2025 am 12:02 AM

In PHP, you can effectively prevent CSRF attacks by using unpredictable tokens. Specific methods include: 1. Generate and embed CSRF tokens in the form; 2. Verify the validity of the token when processing the request.

Describe the purpose and usage of the ... (splat) operator in PHP function arguments and array unpacking. Describe the purpose and usage of the ... (splat) operator in PHP function arguments and array unpacking. Apr 06, 2025 am 12:07 AM

The... (splat) operator in PHP is used to unpack function parameters and arrays, improving code simplicity and efficiency. 1) Function parameter unpacking: Pass the array element as a parameter to the function. 2) Array unpacking: Unpack an array into another array or as a function parameter.

Why do you need to call Vue.use(VueRouter) in the index.js file under the router folder? Why do you need to call Vue.use(VueRouter) in the index.js file under the router folder? Apr 05, 2025 pm 01:03 PM

The necessity of registering VueRouter in the index.js file under the router folder When developing Vue applications, you often encounter problems with routing configuration. Special...

See all articles