Let's talk about Thinkphp 5.0's operation of database (key code)
Sep 23, 2022 pm 07:28 PMA standard website must be inseparable from database operations. In this set of courses, I will work with you to uncover the mystery of ThinkPHP5 data operations, and happily use ThinkPHP5 to operate the database with you, making database operations more changeable. Pleasure.
Basic usage
Query operation
Db::query('select?*?from?think_user?where?id=?',[8]);
Write operation
Db::execute('insert?into?think_user?(id,?name)?values?(?,??)',[8,'thinkphp']);
Query constructor
Query data
find returns a record, and the result returned is a one-dimensional array. If the result does not exist, NULL is returned.
Db::table('think_user')->where('id',1)->find();
select returns all records, and the result returned is a two-dimensional array. If the result does not exist, NULL is returned. Exists, returns an empty array
Db::table('think_user')->where('status',1)->select();
Assistant function
The system provides a db assistant function for more convenient query:
db('user')->where('id',1)->find(); db('user')->where('status',1)->select();
Note: Using the db assistant function will reconnect to the database every time by default, while using the Db::name or Db::table method is a singleton. If the db function needs to use the same link, you can pass in the third parameter, for example
db('user',[],false)->where('id',1)->find(); db('user',[],false)->where('status',1)->select();
Add data
Use Db The insert method of the class submits data to the database
$data?=?['foo'?=>?'bar',?'bar'?=>?'foo']; Db::table('think_user')->insert($data);
Add multiple pieces of data
Add multiple pieces of data and pass it directly to the insertAll method of the Db class The data that needs to be added can be
$data?=?[????['foo'?=>?'bar',?'bar'?=>?'foo'], ????['foo'?=>?'bar1',?'bar'?=>?'foo1'], ????['foo'?=>?'bar2',?'bar'?=>?'foo2'] ]; Db::name('user')->insertAll($data);
insertAll method adds data successfully and returns the number of successfully added items
Assistant function
//?添加單條數(shù)據(jù) db('user')->insert($data); //?添加多條數(shù)據(jù) db('user')->insertAll($list);
Update data
update method returns the number of affected data, no data is modified and returns 0
Db::table('think_user')->where('id',?1)->update(['name'?=>?'thinkphp']);
Update the value of a certain field: setField method returns the number of affected data, no data is modified The data field returns 0
Db::table('think_user')->where('id',1)->setField('name',?'thinkphp');
自增或自減一個(gè)字段的值 //?score?字段加?1 Db::table('think_user')->where('id',?1)->setInc('score'); //?score?字段加?5 Db::table('think_user')->where('id',?1)->setInc('score',?5); //?score?字段減?1 Db::table('think_user')->where('id',?1)->setDec('score'); //?score?字段減?5 Db::table('think_user')->where('id',?1)->setDec('score',?5);
Delayed update
Db::table('think_user')->where('id',?1)->setInc('score',?1,?10);
Delete data
//?根據(jù)主鍵刪除 Db::table('think_user')->delete(1); Db::table('think_user')->delete([1,2,3]); //?條件刪除???? Db::table('think_user')->where('id',1)->delete(); Db::table('think_user')->where('id','<',10)->delete();
Conditional query method
where
You can use the where method to query AND conditions:
Db::table('think_user') ????->where('name','like','%thinkphp') ????->where('status',1) ????->find();
whereOr method
Db::table('think_user') ????->where('name','like','%thinkphp') ????->whereOr('title','like','%thinkphp') ????->find();
Mixed query
where method and whereOr method often need to be mixed together in complex query conditions. Here is an example:
$result?=?Db::table('think_user')->where(function?($query)?{ ????$query->where('id',?1)->whereor('id',?2); })->whereOr(function?($query)?{ ????$query->where('name',?'like',?'think')->whereOr('name',?'like',?'thinkphp'); })->select();
Query expression
Query expression supports most SQL query syntax and is also the essence of ThinkPHP query language. The usage format of query expression is:
where('字段名','表達(dá)式','查詢(xún)條件'); whereOr('字段名','表達(dá)式','查詢(xún)條件');
表達(dá)式?含義 EQ、=?等于(=) NEQ、<>?不等于(<>) GT、>?大于(>) EGT、>=?大于等于(>=) LT、< 小于(<) ELT、<= 小于等于(<=) LIKE 模糊查詢(xún) [NOT] BETWEEN (不在)區(qū)間查詢(xún) [NOT] IN (不在)IN 查詢(xún) [NOT] NULL 查詢(xún)字段是否(不)是NULL [NOT] EXISTS EXISTS查詢(xún) EXP 表達(dá)式查詢(xún),支持SQL語(yǔ)法 >?time?時(shí)間比較 <?time?時(shí)間比較 between?time?時(shí)間比較 notbetween?time?時(shí)間比較
[Related tutorial recommendations: thinkphp framework]
The above is the detailed content of Let's talk about Thinkphp 5.0's operation of database (key code). For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

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

TosettherighttimezoneinPHP,usedate_default_timezone_set()functionatthestartofyourscriptwithavalididentifiersuchas'America/New_York'.1.Usedate_default_timezone_set()beforeanydate/timefunctions.2.Alternatively,configurethephp.inifilebysettingdate.timez

The key to writing clean and easy-to-maintain PHP code lies in clear naming, following standards, reasonable structure, making good use of comments and testability. 1. Use clear variables, functions and class names, such as $userData and calculateTotalPrice(); 2. Follow the PSR-12 standard unified code style; 3. Split the code structure according to responsibilities, and organize it using MVC or Laravel-style catalogs; 4. Avoid noodles-style code and split the logic into small functions with a single responsibility; 5. Add comments at key points and write interface documents to clarify parameters, return values ??and exceptions; 6. Improve testability, adopt dependency injection, reduce global state and static methods. These practices improve code quality, collaboration efficiency and post-maintenance ease.

Yes,youcanrunSQLqueriesusingPHP,andtheprocessinvolveschoosingadatabaseextension,connectingtothedatabase,executingqueriessafely,andclosingconnectionswhendone.Todothis,firstchoosebetweenMySQLiorPDO,withPDObeingmoreflexibleduetosupportingmultipledatabas

PHP page caching improves website performance by reducing server load and speeding up page loading. 1. Basic file cache avoids repeated generation of dynamic content by generating static HTML files and providing services during the validity period; 2. Enable OPcache to compile PHP scripts into bytecode and store them in memory, improving execution efficiency; 3. For dynamic pages with parameters, they should be cached separately according to URL parameters, and avoid cached user-specific content; 4. Lightweight cache libraries such as PHPFastCache can be used to simplify development and support multiple storage drivers. Combining these methods can effectively optimize the caching strategy of PHP projects.

ToquicklytestaPHPcodesnippet,useanonlinePHPsandboxlike3v4l.orgorPHPize.onlineforinstantexecutionwithoutsetup;runcodelocallywithPHPCLIbycreatinga.phpfileandexecutingitviatheterminal;optionallyusephp-rforone-liners;setupalocaldevelopmentenvironmentwith

Upgrading the PHP version is actually not difficult, but the key lies in the operation steps and precautions. The following are the specific methods: 1. Confirm the current PHP version and running environment, use the command line or phpinfo.php file to view; 2. Select the suitable new version and install it. It is recommended to install it with 8.2 or 8.1. Linux users use package manager, and macOS users use Homebrew; 3. Migrate configuration files and extensions, update php.ini and install necessary extensions; 4. Test whether the website is running normally, check the error log to ensure that there is no compatibility problem. Follow these steps and you can successfully complete the upgrade in most situations.

TopreventCSRFattacksinPHP,implementanti-CSRFtokens.1)Generateandstoresecuretokensusingrandom_bytes()orbin2hex(random_bytes(32)),savethemin$_SESSION,andincludetheminformsashiddeninputs.2)ValidatetokensonsubmissionbystrictlycomparingthePOSTtokenwiththe

To set up a PHP development environment, you need to select the appropriate tools and install the configuration correctly. ①The most basic PHP local environment requires three components: the web server (Apache or Nginx), the PHP itself and the database (such as MySQL/MariaDB); ② It is recommended that beginners use integration packages such as XAMPP or MAMP, which simplify the installation process. XAMPP is suitable for Windows and macOS. After installation, the project files are placed in the htdocs directory and accessed through localhost; ③MAMP is suitable for Mac users and supports convenient switching of PHP versions, but the free version has limited functions; ④ Advanced users can manually install them by Homebrew, in macOS/Linux systems
