Database
Mysql Tutorial
Use the mysql_fetch_row() function to obtain each record in the result set row by row (PHP method 6 for operating MySQL database)
Use the mysql_fetch_row() function to obtain each record in the result set row by row (PHP method 6 for operating MySQL database)
Use the mysql_fetch_row() function to obtain each record in the result set row by row (PHP method 6 for operating MySQL database)
We introduced two types earlier To obtain the data in the result set, today we will introduce to you the third mysql_fetch_row() function to obtain the result set. The usage of this function is similar to the function mentioned above!
In the previous articles "Use the mysql_fetch_array() function to obtain the information in the array result set (PHP method 4 for operating MySQL database)" and "Use the mysql_fetch_object() function to obtain the results Concentrate one row as an object (Method 5 of PHP operating MySQL database) " introduced the mysql_fetch_array() function and mysql_fetch_object() function. In this chapter, we introduce the mysql_fetch_row() function in detail!
The syntax format of the function is as follows:
array mysql_fetch_row(resource result)
mysql_fetch_row() function obtains a row of data from the result set associated with the specified result identifier and returns it as an array. This row is assigned to the array variable $row. The column of each result is stored in an array element. Starting from 0, the first array element is accessed in the form of $row[0] (the same is true when there is only one element). A call to the mysql_fetch_row() function will return the result. The next row in the set will return false if there are no more rows.
Note: The field names returned by this function are case-sensitive!
The following example has the same function as the previous article. The difference is that the following example obtains each record in the result set row by row through the mysql_fetch_row() function. Then use the echo statement to output the book information corresponding to each field from the array result set.
The specific development steps are as follows:
1. The implementation process of creating a project, adding a form, connecting to the database, and selecting the database is the same as in the previous article, so I won’t repeat it here for those who are unclear. Friends, you can check it out. This article is linked to the previous article.
2. Different from the previous article, this example uses the mysql_fetch_row() function to obtain the records in the result set row by row. The core code is as follows:
<?php
$sql = mysql_query("select * from tb_book");
$row = mysql_fetch_row($sql);
if ($_POST["Submit"]=="查询"){
$txt_book = $_POST["txt_book"];
$sql = mysql_query("select * from tb_book where bookname like '%".trim($txt_book)."%'"); //执行模糊查询
$row = mysql_fetch_row($sql); //逐行获取查询结果，返回值为数组
}
?>3. Use the if conditional statement to The result set variable $row is judged. If the value is false, then the information you retrieve does not exist. Otherwise, use the do...while loop statement to output the information in the result set in the form of an array. The core code is as follows:
<?php
if ($row == false){
echo "<p align='center' style='color: #FF0000;font-size: 12px'>对不起，你要查询的信息不存在</p>";
}
?>
<?php
do {
?>
<table>
<tr align="left" bgcolor="#FFFFFF">
<td height="20" align="center"><?php echo $row[0] ?></td>
<td height="20" align="center"><?php echo $row[1] ?></td>
<td height="20" align="center"><?php echo $row[2] ?></td>
<td height="20" align="center"><?php echo $row[3] ?></td>
<td height="20" align="center"><?php echo $row[4] ?></td>
<td height="20" align="center"><?php echo $row[5] ?></td>
</tr>
</table>
<?php
}while ($row = mysql_fetch_row($sql));
?>The results of the above example are the same as those of the previous two articles. The pictures are pasted here. Friends can try it locally!
In the next article, we will introduce how to obtain the records in the query result set. For details, please read "Use the mysql_num_rows() function to obtain the number of records in the result set row by row (Method 7 of PHP operating MySQL database)》
The above is the detailed content of Use the mysql_fetch_row() function to obtain each record in the result set row by row (PHP method 6 for operating MySQL database). For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1378
52
The Future of PHP: Adaptations and Innovations
Apr 11, 2025 am 12:01 AM
The future of PHP will be achieved by adapting to new technology trends and introducing innovative features: 1) Adapting to cloud computing, containerization and microservice architectures, supporting Docker and Kubernetes; 2) introducing JIT compilers and enumeration types to improve performance and data processing efficiency; 3) Continuously optimize performance and promote best practices.
MySQL: Simple Concepts for Easy Learning
Apr 10, 2025 am 09:29 AM
MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.
How to open phpmyadmin
Apr 10, 2025 pm 10:51 PM
You can open phpMyAdmin through the following steps: 1. Log in to the website control panel; 2. Find and click the phpMyAdmin icon; 3. Enter MySQL credentials; 4. Click "Login".
PHP vs. Python: Understanding the Differences
Apr 11, 2025 am 12:15 AM
PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
MySQL and SQL: Essential Skills for Developers
Apr 10, 2025 am 09:30 AM
MySQL and SQL are essential skills for developers. 1.MySQL is an open source relational database management system, and SQL is the standard language used to manage and operate databases. 2.MySQL supports multiple storage engines through efficient data storage and retrieval functions, and SQL completes complex data operations through simple statements. 3. Examples of usage include basic queries and advanced queries, such as filtering and sorting by condition. 4. Common errors include syntax errors and performance issues, which can be optimized by checking SQL statements and using EXPLAIN commands. 5. Performance optimization techniques include using indexes, avoiding full table scanning, optimizing JOIN operations and improving code readability.
MySQL: An Introduction to the World's Most Popular Database
Apr 12, 2025 am 12:18 AM
MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.
How to use single threaded redis
Apr 10, 2025 pm 07:12 PM
Redis uses a single threaded architecture to provide high performance, simplicity, and consistency. It utilizes I/O multiplexing, event loops, non-blocking I/O, and shared memory to improve concurrency, but with limitations of concurrency limitations, single point of failure, and unsuitable for write-intensive workloads.
PHP: Is It Dying or Simply Adapting?
Apr 11, 2025 am 12:13 AM
PHP is not dying, but constantly adapting and evolving. 1) PHP has undergone multiple version iterations since 1994 to adapt to new technology trends. 2) It is currently widely used in e-commerce, content management systems and other fields. 3) PHP8 introduces JIT compiler and other functions to improve performance and modernization. 4) Use OPcache and follow PSR-12 standards to optimize performance and code quality.
