PHP (PHP Hypertext Preprocessor) is a general-purpose, open-source scripting language specially designed for web application development and can be easily integrated with HTML. Instead of using many commands to display HTML (like in C or Perl), PHP pages contain HTML fragments, including code that does "something". The PHP code is included between a start tag, allowing the webserver to switch to PHP mode.

What is PHP (PHP Hypertext Preprocessor) used for?

PHP is primarily designed to serve as a server-side scripting language. It can do everything that any CGI script can, such as collecting form data, generating dynamic content, or managing cookies. But PHP can do much more, and this is illustrated by the three areas below: — Server-side scripting language. This is the most traditional use and also the primary purpose of PHP. — Command line programming language. You can write PHP scripts and execute them from the command line without the help of a web server and a browser. … — Write graphical client applications.

What is unique about PHP?

The particularity of PHP is that the code is executed on the server, generating the HTML, which will then be sent to the client. The client only receives the result of the script, with no way to access the code that produced that result. You can configure your web server to parse all your HTML files as PHP files. Thus, there is no way to distinguish pages that are dynamically produced from static pages.

The advantages of PHP

— The most important advantage of PHP is that it is open-source and free. It is often downloaded anywhere and readily available for web application events. — It is independent of the platform. PHP-based applications can run on any operating system, such as UNIX, Linux, and Windows. — The application can be quickly loaded, based on PHP, and connected to the database. It is mainly used because of its faster Internet loading rate and speed than other programming languages. — It has less of a learning curve and is simple to use. If an individual knows that C programming can efficiently work on PHP. — It is more stable after a few years, thanks to continuous support for different versions. — It helps to reuse equivalent code and does not have to write lengthy code and sophisticated structure for the event of web applications. The disadvantages of PHP — PHP is not so secure because of its open-source code, as the ASCII text file is often readily available. — It is not suitable for sizeable content-based web applications. — It has an invalid type, which may result in incorrect data and knowledge for the user. — PHP frameworks have learned to use built-in PHP features to avoid writing additional code. — Using more features of the PHP framework and tools leads to poor performance of online applications. — PHP does not allow changing or modifying the fundamental behaviour of online applications.

How to start using PHP?

The fastest way to learn PHP is to understand the examples listed in tutorials and adapt them to the needs of your web project. All you require for server-side programming with PHP is a web server, including a PHP interpreter, a text editor (e.g. Notepad++ or Vim) and your web browser.


ACF or Advanced Custom Fields, which can be translated into French by advanced custom fields, is indeed an extension widely used by developers on their clients' WordPress sites, because it allows them to do many things that greatly facilitate their life to make sites with advanced features. Advanced Custom Fields (ACF) can also be seen in terms of an extremely powerful WordPress plugin that offers the ability to attach almost any type of custom field to your various post types. The ACF extension thus offers more than 20 default field types.

What is ACF for?

The WordPress Advanced Custom Fields plugin offers the addition of custom fields. They become accessible in addition to, or as a replacement for, content spaces included with WordPress. These fields therefore allow the integration of all content (text, image, video, files and more). Even with the arrival of Gutenberg, WordPress which manages its content in blocks instead of its classic interface, ACF retains a very interesting and very essential place. A web developer can use ACF to create blocks with very precise options such as a title, an image and photo credits. The styles are set in advance. The user's only task therefore becomes the integration of content into what looks like a form. He doesn't have to worry about layout and styles.

What is special about ACF?

The user does not have to wonder about the appearance of the contents, they are adjusted in advance. Here, we touch on the main difference between a “visual builder” (content creation tool), WordPress Gutenberg blocks and the classic content window. In all of these cases, he has to style a lot of the content himself, and thus guess how the options work. With ACF, simplicity is key. Each block has specific, named fields that expect content. For example, to add a title, a list with the choice of title level will present itself. The user will therefore be able to concentrate on the end that interests him, the content of the site.

The advantages of ACF

The main benefit is that, on a live site, you and other site administrators will no longer have access to their configuration in the WordPress menu. In this way, we simply ensure that no one will do anything stupid by modifying the name of a field in production, which could break everything. The biggest advantage of this approach is that you will be able to internationalize the text strings of your fields. So, if you are making a multilingual site, this is explicitly the best approach to choose. There is no limit in using Advanced Custom Field to make the WordPress CMS completely personalized and tailored to your customers. These fields can in this case be used to create very specific personalized content and are designed to create complex personalized interfaces.

How to start using ACF?

You must first install and activate the Advanced Custom Fields plugin like any other extension, to do this, go to your WordPress administration interface then Extensions and finally Add. Search for Advanced Custom Fields (and not just ACF, otherwise it won't find it) and install it, then activate it.


CAPTCHA is a family of Turing tests to automatically differentiate a human user from a computer. This challenge-response test is thus used in computing to verify that the user is not a robot; this verification generally uses the image or sound analysis capacity of the human being. However, the CAPTCHA acronym simply stands for Completely Automated Public Turing test to tell Computers and Humans Apart The purpose of the tool, as its name suggests, is to detect the presence of robots by differentiating them from humans. To do this, CAPTCHA offers Internet users small questionnaires in different forms.

What is Captcha for?

A captcha is very often used to detect the presence of a robot or to confirm access to an interactive website. However, it is also very present to secure contact forms or online registration. This therefore ensures that the information comes from humans and not from a computer. To sum up, a captcha serves to differentiate a human from a computer program or robot.

What is special about Captcha?

CAPTCHA designates first of all a dialog box, but also and above all the whole of the image generation and network routing protocol associated with the resolution of the Turing test. CAPTCHAs are thus fully automated, they only require a few seconds of the user's time. As we have seen previously, a Captcha generally makes it possible to block the access of malicious machines to websites or registration forms.

The advantages of Captcha

As we have seen before, a Captcha basically blocks the access of malicious machines to websites or registration forms. However, Captchas have several benefits among which we can cite the fact that Captchas prevent hackers from using robots to send phishing emails. They also make it possible to restrict the creation of several fake accounts for malicious purposes. Thus, preservation against fraud is ensured, as for polls for example, this because they make it possible to ensure that each vote is indeed carried out by a human. From the provider's point of view, this obviously allows a significant reduction in the workload of website administrators. Automating requests therefore also makes it possible to reduce the resources of a server necessary for their processing. However, CAPTCHAs are able to take a holistic look at a user's behavior and even history of interactions with content on the Internet.

Disadvantages of Captcha

Nevertheless, Captchas do not only have advantages, there are also disadvantages. Even if the installation of a Captcha is of course necessary, it still requires some specific attention. Another disadvantage that should not be overlooked is the fact that the action of a Captcha can affect the user experience. An action is thus necessary in order to prove that you are indeed a natural person, however this action can slow down or even hinder access to the website or to a form. The "riddle" action can therefore be repeated many times, and your desire to continue will have been well shaken.

Other alternatives today

If they are more and more present, Captchas are not the only tool to secure a website or a form. Other methods are also used, for example:
  • Black Lists (or blacklists) which list unwanted addresses.
  • Honeypots that trap "spamming" machines with powerful bait systems.
  • Content filters through keyword analysis, which identify suspicious entries
  • Web server filters that through complex analysis identify suspicious interactions based on visible characteristics and even known patterns.
However, these different methods are much more complex to implement. This is what Google understood when it bought the ReCaptcha Company in 2009. It has thus developed several versions of its tool. Another cause of this is the fact that the product is free for quantities of less than 1 million calls per month, which gives you a margin. However, there is a counterpart, the tests of texts or images will allow Google to feed the AI (Artificial Intelligence). You are going to identify a word, this word will be used to digitize books and old press archives. Similarly, the recognition of a pedestrian crossing or a bus recognized by you on an image, will thus enrich the base for future autonomous vehicles.


Elementor is free software, under GPL 3 license available in free version and in Pro mode. It aims to make the design and maintenance of WordPress pages extremely simple as a visual drag'n drop process. This is called a page builder. Elementor can also be viewed as a design tool for WordPress that allows you to visually design your website using a simple drag-n-drop editor. Once you have installed the Elementor plugin, you can therefore design your WordPress pages and blog posts using this extension instead of the default WordPress editor (sometimes called Gutenberg editor).

What is this for?

• For the designer, it's a pixel-perfect design platform that generates 100% clean code • For the digital marketer, it's a tool for acquiring qualified traffic, leads, as well as assured conversion • For the developer, it is an extensible and user-friendly working environment to create themes, custom add-ons, etc.;

What is its particularity?

Elementor is actively used by millions of websites worldwide. Indeed, it has thus become the most popular WordPress page builder plugin for a variety of reasons: it is intuitive and easy to understand for beginners; it is designed to allow you to master all its features more quickly; it offers many designer-oriented features that make it easy to produce professional-looking designs.

The advantages of Elementor

The main benefit of using it is undoubtedly its ease of handling. Indeed, it allows non-technical people or novices in website creation to create layouts as well as attractive designs, as well as quite complex pages such as: forms, animated graphics and integration of videos.

Cons of Elementor

Although Elementor has several advantages, it does have some disadvantages that should not be overlooked: installing this plug-in makes the page load more cumbersome and thus causes possible display problems. Indeed, Elementor can have an impact on the speed of your website, making it slower, which can therefore affect your SEO.

How to start using it?

To build a page with Elementor, you must first create one with WordPress. An “Edit with Elementor” tab appears. Just click on it. From then on, you access the interface of the extension. Here you will see the main canvas where you can drag in the different elements. These are on the left side. So you can add internal sections, titles, images, videos, buttons, etc. Be careful, creating a page with Elementor requires understanding its structure: • The page is divided into sections; • The columnar section; • The column can include multiple content items; • Each element must be individually designed. The plugin also offers you to switch your site to responsive. In this way, the display is optimal both on mobile and on computer.

Google map api

Google Maps API is an application that provides an intuitive and very responsive interface, it is built using AJAX technologies. It is an open API allowing the customization of the map including even the possibility of adding specific data to the map within the application (customization of controls, event management, creation of markers with tooltip…). Even better, Google provides access to this service for free. In the articles or projects below we will examine some of the basic functionality provided by the Google Maps API.

What is Google Map API used for?

We use this API whenever we need to set up geolocation or to allow Internet users to determine their routes from one point to another. Google provides many tools on the Web, in particular in JavaScript, to create dynamic and user-friendly maps on any website. Its use is also free for developers (under certain conditions and within a certain limit)

What is special about Google Map API?

Google Maps is a powerful and rich tool. In general, when we talk about it, we mainly think of the display of the world map with a landmark. But it's actually much more than that! Geolocation, searches, routes, distances… So many things that this brilliant tool makes available to us!

The benefits of Google Map API

Google Maps has in just a few years become a service used by millions of users, and many developers. The application was indeed free and thus made it possible to integrate many functionalities related to geolocation to websites and applications. But for some time, the situation has changed, the service has indeed become paying for professionals.

How to start using Google Map API?

For those who wish to install a Google Maps map on their site, they must first obtain an API key. And for that, it is essential to have a Gmail account and go to the site dedicated to developers… Then, you just have to let yourself be guided to get your key. You can use Google's service on your site by integrating a small window of the Google Maps application into it. For those who wish to install a Google Maps map on their site, you must first obtain an API key. And for that, you must have a Gmail account and go to the site dedicated to developers… Then you just have to let yourself be guided to get your key.

Let's encrypt

Let's Encrypt is a Certification Authority (Certification Authority abbreviated CA) issuing free Domain Validated certificates (Domain Validated abbreviated DV) for a period of 90 days. Let's Encrypt owns an RSA root certificate stored on a hardware security module that is not used directly. However, this certificate is intended to be replaced later by an ECDSA certificate which will be used to sign two intermediate certificates signed by the certificate authority IdenTrust. One of them will be used to sign the issued certificates, the other as a backup certificate in case of a problem with the first one.

What is Let's Encrypt used for?

Let's Encrypt is a Certificate Authority, and they have more or less the same privileges and powers as every other existing (and larger) Certificate Authority on the market.

What is special about Let's Encrypt?

Let's Encrypt is a free non-profit service provided by the Internet Security Research Group to promote web security by providing free SSL certificates

The advantages of Let's Encrypt

Among the advantages, we can mention that it is:
  • Free: Anyone with a domain name can use Let's Encrypt to obtain a recognized certificate at no cost.
  • It's automatic: it's software that runs on a web server that can interact with Let's Encrypt to easily obtain a certificate, securely configure it for use, and automatically support renewal.
  • Secure: Let's Encrypt serves as a platform to advance TLS security best practices, both on the CA side and to help website managers properly secure their servers.
  • Transparent: All certificates issued or rejected will be publicly recorded and available for inspection by anyone.
  • Open: The issuance and even auto-renewal protocol will be published as an open standard that others can adopt.
  • Cooperative: Like the underlying Internet protocols themselves, Let's Encrypt is thus a joint effort for the benefit of the community, even beyond the control of any one organization.

Disadvantages of Let's Encrypt

Today, the main disadvantage of using a Let's Encrypt certificate is compatibility. This is thus a problem that any new certificate authority must face when approaching the market. Thus, for a certificate to be trusted, it must first be signed by a certificate belonging to a trusted certificate authority. To be trustworthy, a certification authority must therefore have the signing certificate integrated into the browser or the operating system. A certificate authority that enters the market today, even assuming that it is trusted by the root certificate program of each browser or operating system from day 0, which is by the way impossible, will be thus included in the current versions of the various browsers or operating systems. However, they cannot be included in older (and already released) versions.

How do I start using Let's Encrypt?

To start using Let's Encrypt, we first go to the DSM Security config. There, choose Certificates, then create a certificate. So choose to create a new certificate. Then enter a description, select the option to acquire a Let's Encrypt certificate, and set the use of this default certificate. For example, to enable HTTPS on your website, you must obtain a certificate (a particular file) from a certification authority (CA or CA for Certificate Authority in English). Let's Encrypt being a certificate authority. In order to obtain a certificate for your website's domain through Let's Encrypt, you must prove that you control that domain. With Let's Encrypt, you do this by using software using the ACME protocol, which generally runs at your host. To determine which method will work best for you, you will need to know if you have shell access (also known as SSH access) to your hosting. If you manage your site entirely through a control panel like cPanel, Plesk, or even WordPress, chances are you don't have shell access. You can ask your host to be sure in this case.


Symfony is therefore a PHP framework (web programming language) used to develop applications or websites. It is considered as one of the best framework in the creation of web application because it allows to obtain more flexibility

What is Symfony used for?

Symfony is a PHP framework (web programming language), it is used for the development of applications or websites. It is therefore considered as one of the best framework in the creation of web application because it allows to obtain more flexibility. It is also quite easy to learn, thanks to the many documentations available online. Moreover, the debugging tool on Symfony is very powerful. Debugging is used here to identify and fix your faults in the code. This tool therefore saves you considerable time in the development phase of your application. Symfony is therefore a powerful PHP framework used to develop complex or even high-end web applications or websites. Relatively easy to access, Symfony is a set of components or "libraries" that facilitate web development by considerably reducing the time and effort required to create components for the development of a website.

What is special about symfony?

Symfony has the particularity to meet any of your needs for a website. Where a more traditional CMS will meet 70% of your needs, providing sometimes superfluous functionalities or requiring additional customization work, Symfony will meet 95% of your highly customizable needs.

The advantages of symfony

The main advantage that Symfony offers us lies simply in the fact that it is a framework that allows us to save quite a lot of development time. Once you master Symfony, you quickly understand how essential it is. This is therefore a significant help in the organization of our project. The Symfony framework thus prepares the ground by providing a certain structure, thus allowing us to have an organized, well-structured and therefore “tidy” code. A correct and organized architecture is therefore more than necessary today, especially if you are not alone in working on the project. Second, an important point that should not be overlooked is the community. All the developers know it besides, when one codes, Internet is our most faithful friend. In this case with Symfony no problem. It is therefore one of the most used frameworks, the community is very active. As soon as you encounter a problem that you are unable to correct, you can therefore question the community, thus using the framework normally allowing you to be unblocked fairly quickly.

Disadvantages of symfony

Symfony does not only have the advantages, but all the time, if there is a disadvantage with Symfony, it is learning. From the start, this disadvantage can quickly discourage you and cause you to give up. It is more complicated to learn this framework than the language on which it works. The language is therefore quite heavy and complex to handle. You should still know that today there is a symfony agency that can support you in the development of your web project. Finally, not everyone will benefit from using this framework. Due to its size, it is more intended for large projects and does not correspond to small projects, which is why you will not use it, for example, if you want to create a simple website.

How to start using symfony?

To get started with the Symfony framework, you need a few prerequisites, among these prerequisites, we can mention having a minimum knowledge of Object Oriented Programming Understanding how the MVC structure works (Symfony is based on this architecture) If you have already these prerequisites, then you can easily start with Symfony. On the other hand, by their structures, the frameworks can be complicated to handle at the beginning. It is for this reason that it is necessary to have some prerequisites when one wishes to use it. Symfony is a framework written in PHP. It is therefore essential that you have a good foundation in PHP, especially in programming.

Wordpress Job manager

WordPress Job Manager is a plugin that allows the creation and management of the "Job" or "Recruitment" space of your WordPress blog. So if you want to create this kind of space on your professional blog, you just have to activate this plugin and start configuring and creating new jobs. In a few words, this plugin allows you to add job board functionality to your WordPress site. You will therefore be able to distribute your job offers, manage the various posts and finally categorize your offers using the classic WordPress interface.

What is WordPress Job manager for?

WordPress Job manager serves to perform several actions and offers several possibilities. We can cite :
  • An interface for distributing job offers, here the plugin automatically creates a page for recruiters, which will allow them to have privileged access to their account and to submit their offers directly without ever having to go through the “administration” interface of your site.
  • An interface for publishing job offers that will allow different recruiters to manage their offers without going through the administration. They can thus directly modify the content of the advertisements and hide the offers already filled.
  • An interface for candidates where they can search, filter and even apply directly to job offers.

What is special about WordPress Job manager?

The particularity of WordPress Job manager is that after installing and activating the plugin, you will be asked to choose the content of your job board. WordPress Job Manager therefore offers you three customizable pages. You can thus get each of these options. If for example you don't want to give employers the power to create and manage job postings themselves, just uncheck the Add a job and Jobs dashboard options so that only the Jobs page is created. .

The advantages of WordPress Job manager

Here are some of the advantages offered by WordPress job manager:
  • WordPress job manager is a CV manager (Resume Manager) that allows you to create a CV database.
  • This is the Emails Add-on that allows you to fully customize your email templates and generate personalized emails.
  • WordPress job manager is a user locator that automatically detects the location of your visitors to offer them relevant results.
  • WordPress job manager is the automatic CV module that allows candidates to be suggested to automatically generate CVs based on their profile.
  • It allows Indeed integration to post Indeed jobs on your job board using shortcodes.
  • WordPress job manager job alerts to allow registered users to save their searches and create email alerts at regular intervals.

Basic Features of WP Job Manager

After installing and activating the plugin you will basically choose the content of your job board. WordPress Job Manager offers you three customizable pages. You can therefore uncheck each of these options. If, for example, you don't want to give employers the power to create and manage jobs themselves, uncheck the Add Job and Jobs Dashboard options so that only the Jobs page is created. Once you have decided which pages you want to create, simply click Create Selected Pages to generate them. You can also skip the setup wizard altogether and insert these features anywhere using the included shortcodes.

How to start using WordPress Job manager?

The use of WordPress Job manager begins with its installation. However, installing the plugin is very simple, you just need to login to your WordPress admin panel, navigate to the Extensions menu and click on Add. In the search field, it is up to you to type “WP Job Manager” to access the plugin more quickly. Once you find it, you can therefore see details such as version, ratings and even description. Then just click on “Install now” and then click on the “Activate” button that will appear immediately after installation. WordPress Job Manager therefore remains accessible to everyone thanks to its ease of use. Once you have installed the basic features, all you have to do is decide how you want to manage your job board.

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