The best PHP database operation class-ezSQL_PHP tutorial
ezSQL is a very easy-to-use PHP database operation class. The database operation of the famous open source blog WordPress uses the MySQL part of ezSQL. This database operation class supports almost all mainstream databases, such as: PHP-PDO, mySQL, Oracle, InterBase/FireBird, PostgreSQL, SQLite and MS-SQL, etc. ezSQL has a strong debugging function, which can quickly check the execution of SQL code. Using ezSQL can save us development time, simplify code and improve operating efficiency.
Needless to say, the advantages of ezSQL are that it is small, fast, simple, easy to use, and open source. There is also safety, it has considered every detail for you that you didn’t expect. You just need to include the relevant PHP files at the beginning of your script, and then you can use a more useful set of ezSQL functions instead of the standard PHP database operation functions.
The following are some main functions in ezSQL:
$db->get_results -- Read the data set from the database.
$db->get_row -- Read a row of data from the database.
$db->get_col -- Read a specified data set from the database.
$db->get_var -- Read a value from the database's data set.
$db->query -- Execute a SQL statement.
$db->debug -- Print the last executed SQL statement and its returned results.
$db->vardump -- Print the structure and contents of variables.
$db->select -- Select a new database.
$db->get_col_info -- Get column information.
$db->hide_errors -- Hide errors.
$db->show_errors -- Show errors.
The method of using ezSQL is very simple. First download the ezSQL source code, then put the ez_sql_core.php file and ez_sql_mysql.php file (here, mySQL is used as an example) in the same directory as your script file, and then put the following Add the code to the front of your script file so that you can use ezSQL normally.
<?php <br />// 包含ezSQL的核心文件<br>include_once "ez_sql_core.php";<br><br>// 包含ezSQL具体的数据库文件,这里以mySQL为例<br>include_once "ez_sql_mysql.php";<br><br>// 初始化数据库对象并建立数据库连接<br>$db = new ezSQL_mysql('db_user','db_password','db_name','db_host');<br>?>
The following are application examples of some main functions in ezSQL. These codes are from the official help document of ezSQL.
Example 1:
// Select multiple records from the database and print them out..<br>$users = $db->get_results("SELECT name, email FROM users");<br>foreach ( $users as $user ) {<br> // Access data using object syntax<br> echo $user->name;<br> echo $user->email;<br>}
Example 2:
// Get one row from the database and print it out..<br>$user = $db->get_row("SELECT name,email FROM users WHERE id = 2");<br>echo $user->name;<br>echo $user->email;
Example 3:
// Get one variable from the database and print it out..<br>$var = $db->get_var("SELECT count(*) FROM users");<br>echo $var;
Example 4:
// Insert into the database<br>$db->query("INSERT INTO users (id, name, email) VALUES (NULL,'justin','jv@foo.com')");
Example 5:
// Update the database<br>$db->query("UPDATE users SET name = 'Justin' WHERE id = 2)");
Example 6:
// Display last query and all associated results<br>$db->debug();
Example 7:
// Display the structure and contents of any result(s) .. or any variable<br>$results = $db->get_results("SELECT name, email FROM users");<br>$db->vardump($results);
Example 8:
// Get 'one column' (based on column index) and print it out..<br>$names = $db->get_col("SELECT name,email FROM users",0)<br>foreach ( $names as $name ) {<br> echo $name;<br>}
Example 9:
// Same as above ‘but quicker’<br>foreach ( $db->get_col("SELECT name,email FROM users",0) as $name ) {<br> echo $name;<br>}
Example 10:
// Map out the full schema of any given database and print it out..<br>$db->select("my_database");<br>foreach ( $db->get_col("SHOW TABLES",0) as $table_name ) {<br> $db->debug();<br> $db->get_results("DESC $table_name");<br>}<br>$db->debug();

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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