PHP-Einführung - Lesson 8 - Composer (Dependency manager) and JSON. Alexander Lichter June 27, 2017
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1 PHP-Einführung - Lesson 8 - Composer (Dependency manager) and JSON Alexander Lichter June 27, 2017
2 Content of this lesson 1. Recap 2. Composer 3. JSON 4. Collections (next lesson) 1
3 Recap
4 Recap Recap Recap 2
5 Composer
6 Questions about the installation? Do you have questions concerning the installation of Composer? We have time to go through them now! 3
7 Basic usage of composer - Version Alright, we are good to go now! 4
8 Basic usage of composer - Version Alright, we are good to go now! Let s start with an easy command: composer -v 4
9 Basic usage of composer - Version Alright, we are good to go now! Let s start with an easy command: composer -v It should show you the version of your installed composer 4
10 Basic usage of composer - Init Okay. Let s initialize composer for our project. Each project has it s own composer file and it s own dependencies (obviously) 5
11 Basic usage of composer - Init Okay. Let s initialize composer for our project. Each project has it s own composer file and it s own dependencies (obviously) Now go to your project root folder and issue composer init 5
12 Basic usage of composer - Init Okay. Let s initialize composer for our project. Each project has it s own composer file and it s own dependencies (obviously) Now go to your project root folder and issue composer init You now should walk through the init wizard without problems. When it you are asked if you want to add your dependencies interactively, write no. Same goes for the dev-dependencies. Now confirm the generation! 5
13 Basic usage of composer - Lock and JSON file Congratulations! Your composer file is ready to go! You have a composer.json and a composer.lock file in your project root now. While the composer.json is used for the configuration of composer, the composer.lock saves the currently imported dependencies (with the exact versions). 6
14 Basic usage of composer - Lock and JSON file Congratulations! Your composer file is ready to go! You have a composer.json and a composer.lock file in your project root now. While the composer.json is used for the configuration of composer, the composer.lock saves the currently imported dependencies (with the exact versions). But why do we need a lock file? 6
15 Basic usage of composer - Lock and JSON file Congratulations! Your composer file is ready to go! You have a composer.json and a composer.lock file in your project root now. While the composer.json is used for the configuration of composer, the composer.lock saves the currently imported dependencies (with the exact versions). But why do we need a lock file? It s great for deploying on production servers, because you get the exact same dependencies as you have on your testing/local environment. Which means: Your production environment is (almost) equal to your local one. When committing to a VCS 6
16 Basic usage of composer - Lock and JSON file Congratulations! Your composer file is ready to go! You have a composer.json and a composer.lock file in your project root now. While the composer.json is used for the configuration of composer, the composer.lock saves the currently imported dependencies (with the exact versions). But why do we need a lock file? It s great for deploying on production servers, because you get the exact same dependencies as you have on your testing/local environment. Which means: Your production environment is (almost) equal to your local one. When committing to a VCS (Git, or SVN [but better go for git]), commit both files! 6
17 Basic usage of composer - Different dependencies Two slides before, when we initialized our composer setup, I ve mentioned dependencies and dev-dependencies. So we have two different dependency types.. But why? 7
18 Basic usage of composer - Different dependencies Two slides before, when we initialized our composer setup, I ve mentioned dependencies and dev-dependencies. So we have two different dependency types.. But why? Dev-dependencies are only those dependencies we need to develop our application. They shouldn t appear on our production server. Things like: Mockup libaries, Testing systems (PHPUnit), Debug tools, and so on. 7
19 Basic usage of composer - Different dependencies Two slides before, when we initialized our composer setup, I ve mentioned dependencies and dev-dependencies. So we have two different dependency types.. But why? Dev-dependencies are only those dependencies we need to develop our application. They shouldn t appear on our production server. Things like: Mockup libaries, Testing systems (PHPUnit), Debug tools, and so on. 7
20 Basic usage of composer - Require and Install This leads us to the next steps: Setting up dependencies This will work with composer require[-dev] AUTHOR/PACKAGE [version], while require is for normal dependencies and require-dev is for dev-dependencies 8
21 Basic usage of composer - Require and Install This leads us to the next steps: Setting up dependencies This will work with composer require[-dev] AUTHOR/PACKAGE [version], while require is for normal dependencies and require-dev is for dev-dependencies The version constraint is optional. We ll talk about that in a few minutes! If you don t pass anything, the latest version is used. 8
22 Basic usage of composer - Require and Install This leads us to the next steps: Setting up dependencies This will work with composer require[-dev] AUTHOR/PACKAGE [version], while require is for normal dependencies and require-dev is for dev-dependencies The version constraint is optional. We ll talk about that in a few minutes! If you don t pass anything, the latest version is used. If you want to install your dependencies based on your.lock file now (on another PC/Server e.g.), you can use composer install [--no-dev]. Again, no-dev is used for production and will not install dev-dependencies. 8
23 Basic usage of composer - Update dependencies Every now and then you may want to update your dependencies :D (New features, security stuff and so on). This will work with only one command: composer update 9
24 Basic usage of composer - Update dependencies Every now and then you may want to update your dependencies :D (New features, security stuff and so on). This will work with only one command: composer update And that s it! Your.lock file is updated too, so you don t need to worry about that. 9
25 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. 10
26 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description 10
27 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact version number (and Exact only this version) 10
28 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact version number (and Exact only this version) 10
29 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact version number (and Exact only this version) >=1.0 <1.9 A simple version range Range 10
30 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact version number (and Exact only this version) >=1.0 <1.9 A simple version range Range 10
31 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact Exact version number (and only this version) Range >=1.0 <1.9 A simple version range Range (-) The same as >=1.0.0 <2.1 10
32 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact Exact version number (and only this version) Range >=1.0 <1.9 A simple version range Range (-) The same as >=1.0.0 <2.1 10
33 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact Exact version number (and only this version) Range >=1.0 <1.9 A simple version range Range (-) The same as >=1.0.0 <2.1 Wildcard 1.0.* Equal to >=1.0 <1.1 10
34 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact Exact version number (and only this version) Range >=1.0 <1.9 A simple version range Range (-) The same as >=1.0.0 <2.1 Wildcard 1.0.* Equal to >=1.0 <1.1 10
35 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact Exact version number (and only this version) Range >=1.0 <1.9 A simple version range Range (-) The same as >=1.0.0 <2.1 Wildcard 1.0.* Equal to >=1.0 <1.1 Tilde Like >=1.2.3 <
36 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact Exact version number (and only this version) Range >=1.0 <1.9 A simple version range Range (-) The same as >=1.0.0 <2.1 Wildcard 1.0.* Equal to >=1.0 <1.1 Tilde Like >=1.2.3 <
37 Basic usage of composer - Versions The cool thing in composer is: You can setup your version constraint by a huge set of rules. Each developer has his own scheme about how to provide minor/major/patch/hotfix updates, so this won t be a problem for you too if you setup the versions correctly. Type Example Description Exact Exact version number (and only this version) Range >=1.0 <1.9 A simple version range Range (-) The same as >=1.0.0 <2.1 Wildcard 1.0.* Equal to >=1.0 <1.1 Tilde Like >=1.2.3 <1.3.0 Caret ˆ1.2.3 Like >=1.2.3 <2.0.0 (ideal for non-breaking) 10
38 Basic usage of composer - Removing dependencies and global installation Removing dependencies is as easy as adding them: composer remove AUTHOR/PACKAGENAME 11
39 Basic usage of composer - Removing dependencies and global installation Removing dependencies is as easy as adding them: composer remove AUTHOR/PACKAGENAME Sometimes, you may like to add a dependency globally, and therefore for your whole machine. composer global require AUTHOR/PACKAGENAME 11
40 Basic usage of composer - Removing dependencies and global installation Removing dependencies is as easy as adding them: composer remove AUTHOR/PACKAGENAME Sometimes, you may like to add a dependency globally, and therefore for your whole machine. composer global require AUTHOR/PACKAGENAME Be aware that you need to add them to your production machine manually then! 11
41 Basic usage of composer - Where to find package names Sometimes you may have an idea what packages you need for your applications, but you don t know the name(s)... So, what can we do? 12
42 Basic usage of composer - Where to find package names Sometimes you may have an idea what packages you need for your applications, but you don t know the name(s)... So, what can we do? Look up on their git repository 12
43 Basic usage of composer - Where to find package names Sometimes you may have an idea what packages you need for your applications, but you don t know the name(s)... So, what can we do? Look up on their git repository Use composer search NAME 12
44 Basic usage of composer - Where to find package names Sometimes you may have an idea what packages you need for your applications, but you don t know the name(s)... So, what can we do? Look up on their git repository Use composer search NAME Search on 12
45 Basic usage of composer - Autoloading One of the greatest features of composer? It creates an Autoloader for all dependencies! You can require the vendor/autoload.php file and you are good to go! 13
46 Basic usage of composer - Autoloading One of the greatest features of composer? It creates an Autoloader for all dependencies! You can require the vendor/autoload.php file and you are good to go! (All dependencies are saved in /vendor. You must not need commit this file to your VCS) 13
47 Basic usage of composer - Let s require! Okay! For our next topics we need a library called Collect. It is a split from the Laravel Framework Collection package and will help us to deal with data well. Let s require it for our project! It s called tightenco/collect 14
48 JSON
49 What is JSON JSON stands for JavaScript Object Notation. It s a human-readable data transmission format, that is lightweight and language-independent. Because it is text-only, it is widely used for communicating between browser and server through an API. It can also easily transmit objects, arrays and simple variables. 15
50 What is JSON JSON stands for JavaScript Object Notation. It s a human-readable data transmission format, that is lightweight and language-independent. Because it is text-only, it is widely used for communicating between browser and server through an API. It can also easily transmit objects, arrays and simple variables. 1 //An JSON o b j e c t : 2 { name : Max, age : 2 1, c i t y : San J o s e } ; 15
51 PHP and JSON PHP has built-in methods to en- and decode json: 1 $ o b j e c t = j s o n d e c o d e ( { name : Max, age : 2 1, c i t y : San J o s e } ) ; 2 echo $ o b j e c t >name ; //Max 3 var dump ( $ o b j e c t ) ; 4 5 echo j s o n e n c o d e ( $ o b j e c t ) ; // R e t u r n s s t r i n g from above 6 16
52 DD Before we will go through the next tasks, I suggest you another package called larapack/dd. It comes with a function called dd(), which is a die and dump aka. debug function. It ll make your life easier when working with arrays. 17
53 DD Before we will go through the next tasks, I suggest you another package called larapack/dd. It comes with a function called dd(), which is a die and dump aka. debug function. It ll make your life easier when working with arrays. How to use it: 1 $ o b j e c t = j s o n d e c o d e ( { name : Max, age : 2 1, c i t y : San J o s e } ) ; 2 dd ( $ o b j e c t ) ; 3 17
54 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( 18
55 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( Your first task is to decode the JSON file, without downloading it locally, and printing out the object! 18
56 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( Your first task is to decode the JSON file, without downloading it locally, and printing out the object! Now, iterate over each element and print out the title! 18
57 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( Your first task is to decode the JSON file, without downloading it locally, and printing out the object! Now, iterate over each element and print out the title! And finally, reduce your title output to those tracks that have a track number starting with
58 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( 19
59 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( Your first task is to decode the JSON file, without downloading it locally, and printing out the object! 19
60 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( Your first task is to decode the JSON file, without downloading it locally, and printing out the object! Now, iterate over each element and print out the title! 19
61 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( Your first task is to decode the JSON file, without downloading it locally, and printing out the object! Now, iterate over each element and print out the title! BONUS: Create a array that only contains the titles before! 19
62 Tasks!!!111eleven I ve set up a little JSON file called tracks.json, that can be found on code/tracks.json It contains tracks that were downloaded by users of CloudCatcher ( Your first task is to decode the JSON file, without downloading it locally, and printing out the object! Now, iterate over each element and print out the title! BONUS: Create a array that only contains the titles before! And finally, reduce your title output to those tracks that have a track number starting with
63 Collections (next lesson)
64
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