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Semalt: 3 étapes pour gratter la page Web PHP

Le grattage Web, également appelé extraction de données Web ou récolte de processus d'extraction de données à partir d'un site Web ou d'un blog. Ces informations sont ensuite utilisées pour définir des métabalises, des méta descriptions, des mots-clés et des liens vers un site, améliorant ainsi ses performances globales dans les résultats des moteurs de recherche.

Deux techniques principales sont utilisées pour gratter les données:

  •  Analyse de documents  - Il s'agit d'un document XML ou HTML converti en DOM (Document Object Model) des dossiers. PHP nous fournit une excellente extension DOM.
  •  Expressions régulières  - C'est une manière de récupérer des données des documents Web sous la forme d'expressions régulières.

Le problème avec les données de grattage du site Web d'un tiers est lié à ses droits d'auteur, car vous n'êtes pas autorisé à utiliser ces données. Mais avec PHP, vous pouvez facilement gratter les données sans problèmes liés aux droits d'auteur ou de mauvaise qualité. En tant que programmeur PHP, vous pouvez avoir besoin de données provenant de différents sites Web à des fins de codage. Ici, nous avons expliqué comment obtenir des données d'autres sites efficacement, mais avant cela, vous devez garder à l'esprit qu'à la fin vous obtiendrez des fichiers index.php ou scrape.js.

Étapes1: Créer un formulaire pour entrer l'URL du site Web:

Tout d'abord, vous devez créer un formulaire dans index.php en cliquant sur le bouton Soumettre et entrer l'adresse URL du site.


Entrez l'URL du site Web pour gratter les données

(44 )


Steps2: Créer une fonction PHP pour obtenir des données de site Web:

La deuxième étape consiste à créer La fonction PHP racle dans le fichier scrape.php car cela aidera à obtenir des données et à utiliser la bibliothèque d'URL. Il vous permettra également de vous connecter et de communiquer avec différents serveurs et protocoles sans aucun problème..

function scrapeSiteData ($ website_url) {

if (! Function_exists ('curl_init')) {

die ('cURL n'est pas installé. Veuillez installer et réessayer. ');

}

$ curl = curl_init

;

curl_setopt ($ curl, CURLOPT_URL, $ website_url);

curl_setopt ($ curl, CURLOPT_RETURNTRANSFER, true);

$ output = curl_exec ($ curl);

curl_close ($ curl);

return $ output;

}

Ici, nous pouvons voir si le PHP cURL a été installé correctement ou non. Trois cURL principaux doivent être utilisés dans la zone des fonctions et curl_init

aidera à initialiser les sessions, curl_exec

l'exécutera et curl_close

aidera à fermer la connexion

 Les variables telles que CURLOPT_URL sont utilisées pour définir les URL de sites Web que nous devons extraire. Le deuxième CURLOPT_RETURNTRANSFER aidera à stocker les pages grattées dans le formulaire variable plutôt que son formulaire par défaut, qui affichera finalement la page Web entière.

Steps3: Raclage des données spécifiques du site Web:

Il est temps de gérer les fonctionnalités de votre fichier PHP et de gratter la section spécifique de votre page Web. Si vous ne voulez pas toutes les données d'une URL spécifique, vous devez modifier les variables CURLOPT_RETURNTRANSFER et mettre en surbrillance les sections que vous voulez supprimer.

if (isset ($ _ POST ['envoyer'])) {

$ html = scrapeWebsiteData ($ _ POST ['website_url']);

$ start_point = strpos ($ html, 'Derniers messages');

$ end_point = strpos ($ html, '', $ start_point);

$ longueur = $ end_point- $ start_point;

$ html = substr ($ html, $ start_point, $ longueur);

echo $ html;

}

Nous vous suggérons de développer les connaissances de base de PHP et les expressions régulières avant d'utiliser l'un de ces codes ou de racler un blog ou un site Web particulier à des fins personnelles.

George Forrest
Thank you for reading my blog post on 'Semalt: 3 étapes pour gratter la page Web PHP'. I hope you find it useful!
Michael Smith
Great article! The step-by-step approach you provided is really helpful for scraping PHP web pages. I will definitely give it a try.
George Forrest
Thank you, Michael! I'm glad you found the article useful. Let me know if you have any questions or need further assistance.
Sophie Anderson
Interesting read! I've been looking for an efficient way to scrape PHP web pages. Your article seems promising.
George Forrest
Thank you, Sophie! I'm glad you found the article promising. If you decide to give it a try, feel free to reach out if you need any guidance.
David Johnson
I appreciate the detailed explanation of the scraping process. It will definitely save me a lot of time when working with PHP web pages.
George Forrest
You're welcome, David! I'm happy to hear that the article will help you save time. Let me know if you have any specific questions or need assistance with anything.
Rachel Wilson
I've been using Semalt for web scraping, and it has been a game-changer for me. Excited to implement the 3-step process you described.
George Forrest
That's awesome, Rachel! Semalt is indeed a powerful tool for web scraping. I'm glad you're excited to implement the 3-step process. Let me know if you need any support along the way.
Oliver Brown
The article is well-written and easy to follow. I'm looking forward to trying out the PHP web scraping technique you shared.
George Forrest
Thank you, Oliver! I appreciate your kind words. Feel free to reach out if you have any questions or need assistance while trying out the PHP web scraping technique.
Emily Turner
I've been using Semalt for a while now, and it has simplified my web scraping tasks significantly. Thanks for sharing this valuable information!
George Forrest
You're welcome, Emily! I'm happy to hear that Semalt has simplified your web scraping tasks. If you ever need any further information or have queries, feel free to ask.
Andrew Clark
As a web developer, I'm always interested in learning new techniques. Your blog post provided valuable insights for scraping PHP web pages. Thanks!
George Forrest
Thank you, Andrew! I'm glad the blog post provided valuable insights for you as a web developer. If you have any questions or need guidance while implementing the techniques, feel free to ask.
Jennifer Evans
I've heard about Semalt but haven't explored it yet. After reading your article, I'm convinced to give it a try. Thanks for sharing!
George Forrest
That's great to hear, Jennifer! I'm glad the article convinced you to give Semalt a try. Feel free to reach out if you need any assistance or have questions during the exploration process.
Lucas Martinez
Your article came at the perfect time for me. I've been struggling with scraping PHP web pages, and your 3-step process seems like a valuable solution.
George Forrest
I'm glad to hear that, Lucas! Timing can indeed be helpful. If you encounter any challenges or need guidance while applying the 3-step process, feel free to ask for assistance.
Sophia Adams
I've been using Semalt for web scraping purposes, and it's been a reliable tool. Your article provided additional insights that will enhance my scraping workflow.
George Forrest
Thank you, Sophia! I'm glad to hear that Semalt has been reliable for your web scraping tasks. If you have any questions or need further enhancements in your workflow, feel free to let me know.
Leo Hernandez
The step-by-step approach you shared in the article simplifies the PHP web scraping process. Kudos to you, George!
George Forrest
Thank you, Leo! I'm glad you found the step-by-step approach helpful. If you have any queries or need assistance while implementing it, feel free to ask.
Daniel Davies
Great article, George! The 3-step process you described seems efficient for scraping PHP web pages. I'll definitely give it a try.
George Forrest
Thank you, Daniel! I appreciate your feedback. Let me know if you need any assistance or have questions while trying out the 3-step process.
Olivia Murphy
As a beginner in web scraping, your article has been enlightening. The step-by-step instructions make it easy to grasp the concepts.
George Forrest
I'm glad to hear that, Olivia! Beginner-friendly content is always a focus for me. If you ever need any clarifications or further guidance, feel free to ask.
Matthew Wilson
This article provides a comprehensive guide to scraping PHP web pages. The inclusion of Semalt as a recommended tool is a bonus.
George Forrest
Thank you, Matthew! I aim to provide comprehensive guides, and Semalt is indeed a reliable tool. Let me know if you have questions or need any support.
Emma Wilson
I've been struggling to scrape PHP web pages effectively. Your article seems like it will provide the insights I need!
George Forrest
I'm glad you think so, Emma! If you have any specific questions or need assistance while implementing the insights from the article, feel free to ask.
Noah Hall
The step-by-step process you shared will be valuable for automating my PHP web scraping tasks. Thanks for sharing your expertise!
George Forrest
You're welcome, Noah! I'm glad you found the step-by-step process valuable for automating your PHP web scraping tasks. If you have any questions or need any advice, feel free to ask.
Lily Clark
Your article has inspired me to dive deeper into web scraping with Semalt. The 3-step process provides a solid foundation. Thank you, George!
George Forrest
That's wonderful to hear, Lily! I'm glad my article inspired you to dive deeper into web scraping with Semalt. If you need any guidance or have questions during your diving process, feel free to reach out.
Thomas Robinson
The step-by-step instructions in the article are clear and concise. I appreciate the effort you put into sharing your knowledge!
George Forrest
Thank you, Thomas! Clear and concise instructions are always my aim. If you have any questions or need any further knowledge sharing, feel free to ask.
Grace Adams
I've been using Semalt for web scraping, and it has been a game-changer. The 3-step process you shared aligns well with my workflow. Thanks, George!
George Forrest
You're welcome, Grace! I'm glad Semalt has been a game-changer for you. If you have any questions or need any further assistance while aligning the 3-step process with your workflow, feel free to ask.
William Turner
Your article provides valuable insights into scraping PHP web pages. The visuals and explanations make it easy to follow. Great job, George!
George Forrest
Thank you, William! I appreciate your positive feedback. If you have any questions or need any further insights while following the visuals and explanations, feel free to ask.
Victoria Parker
I'm impressed by the simplicity of the 3-step process you shared. It seems like an efficient approach for scraping PHP web pages.
George Forrest
Thank you, Victoria! I'm glad you find the 3-step process simple yet efficient for scraping PHP web pages. If you have any questions or need assistance while implementing it, feel free to ask.
Joseph Wright
Your article comes across as well-researched and informative. The step-by-step process will definitely be helpful for scraping PHP web pages.
George Forrest
Thank you, Joseph! I strive for well-researched and informative articles. If you have any queries or need any assistance while applying the step-by-step process, feel free to reach out.
Natalie Harris
The inclusion of Semalt as a reliable tool in your article caught my attention. The step-by-step process is an added bonus!
George Forrest
Thank you, Natalie! Semalt is indeed a reliable tool, and I'm glad the step-by-step process caught your attention. If you have any questions or need any additional insights, feel free to ask.
Samuel White
Your article provides actionable steps for scraping PHP web pages without unnecessary complexity. Thanks for sharing your expertise, George!
George Forrest
You're welcome, Samuel! I'm glad you found the steps actionable without unnecessary complexity. If you need further assistance or have any questions, feel free to reach out.
Chloe Wilson
The step-by-step process you described in your article seems straightforward and effective. I'm excited to give it a try with Semalt.
George Forrest
That's great to hear, Chloe! I'm excited for you to give the step-by-step process a try with Semalt. Let me know if you need any guidance or have questions during the process.
Henry Davis
Your article has inspired me to explore web scraping possibilities further. The 3-step process seems like a great starting point.
George Forrest
I'm glad to have inspired you, Henry! Exploring web scraping possibilities can be exciting. If you have any questions or need assistance as you start with the 3-step process, feel free to ask.
Ella Martinez
I appreciate the practical approach you took in describing the scraping process. It makes it easier for beginners like me to understand.
George Forrest
Thank you, Ella! I aim to provide practical approaches that beginners can easily understand. If you need any clarifications or have further questions, feel free to ask.
Andrew Scott
Your article taught me new techniques for scraping PHP web pages. The examples and explanations allowed for easy implementation. Thanks, George!
George Forrest
You're welcome, Andrew! I'm glad my article taught you new scraping techniques. If you have any questions or need further examples during the implementation, feel free to ask.
Isabella Carter
The step-by-step process you shared is well-structured and easy to follow. Thanks for breaking it down, George!
George Forrest
Thank you, Isabella! I appreciate your feedback. If you have any questions or need assistance while following the well-structured process, feel free to reach out.
Daniel Phillips
I've been using Semalt for web scraping, and it has been a reliable tool. Your article adds more value to its capabilities. Thanks, George!
George Forrest
You're welcome, Daniel! I'm glad to hear that Semalt has been reliable for you. If you need any further information or have questions regarding its capabilities, feel free to ask.
Abigail Cooper
The step-by-step process in your article simplifies PHP web scraping. Thanks for sharing your knowledge, George!
George Forrest
You're welcome, Abigail! Simplifying PHP web scraping is always a goal. If you have any questions or need further knowledge sharing, feel free to ask.
Samuel Hughes
Your article stands out with its practical explanations and examples. The step-by-step process will definitely be useful. Thanks, George!
George Forrest
Thank you, Samuel! I'm glad you found the practical explanations and examples helpful. If you have any questions or need any assistance while applying the step-by-step process, feel free to reach out.
Victoria Russell
The inclusion of Semalt in your article provides credibility. The 3-step process aligns well with my workflow. Thanks, George!
George Forrest
Thank you, Victoria! I'm glad the inclusion of Semalt adds credibility for you. If you need any further insights or have questions while aligning the 3-step process with your workflow, feel free to ask.
Daniel Harris
Your article serves as a reference point for scraping PHP web pages effectively. The step-by-step process is valuable. Thanks, George!
George Forrest
You're welcome, Daniel! I'm glad you found the article valuable as a reference point for effective PHP web scraping. If you have any questions or need guidance while implementing the step-by-step process, feel free to ask.
Ava Lewis
Your article provides a solid foundation for scraping PHP web pages. The visuals and explanations make it easy to follow. Great job, George!
George Forrest
Thank you, Ava! I appreciate your positive feedback. If you have any questions or need any further insights while following the visuals and explanations, feel free to ask.
James Wright
Your article simplifies the process of scraping PHP web pages. The examples add clarity. Thank you for sharing your expertise, George!
George Forrest
You're welcome, James! Simplifying the process and adding clarity are important aspects. If you need any further examples or have questions regarding the scraping process, feel free to reach out.
Grace Morgan
I've been looking for a reliable way to scrape PHP web pages. Your article seems like a promising solution. Thanks, George!
George Forrest
Thank you, Grace! I'm glad you find the article promising for your PHP web scraping needs. If you have any questions or need any assistance while implementing the solution, feel free to ask.
Charles Bailey
Your article covers all the necessary steps for scraping PHP web pages effectively. The visuals add great value. Thanks for sharing, George!
George Forrest
You're welcome, Charles! I aim to cover all necessary steps and provide value through visuals. If you have any questions or need any further insights, feel free to ask.
Madison Adams
The practical approach you took in your article makes it easy to follow. The step-by-step process is well-explained. Thanks, George!
George Forrest
Thank you, Madison! I'm glad you found the practical approach and well-explained step-by-step process helpful. If you have any questions or need further guidance, feel free to ask.
Jack Nelson
Your article simplifies the complexities of scraping PHP web pages. The 3-step process is valuable for beginners and experts alike. Thanks, George!
George Forrest
You're welcome, Jack! Simplifying complexities is a goal, and I'm glad the 3-step process is valuable for both beginners and experts. If you have any questions or need any assistance, feel free to reach out.
Lucy Turner
I've been using Semalt for web scraping, and it has been a reliable tool. Your article enhances its capabilities. Thanks, George!
George Forrest
Thank you, Lucy! I'm glad Semalt has been reliable for you. If you need any further information or have questions regarding its capabilities and enhanced usage, feel free to ask.
Noah King
Your article provides valuable insights for scraping PHP web pages. The examples offer practical implementation guidance. Thank you, George!
George Forrest
You're welcome, Noah! Valuable insights and practical examples are always a focus. If you have any questions or need further implementation guidance, feel free to ask.
Sophia Mitchell
The step-by-step process you described in your article simplifies PHP web scraping. The visuals add clarity. Well done, George!
George Forrest
Thank you, Sophia! Simplifying PHP web scraping and adding clarity are important aspects. If you need any further assistance or have questions, feel free to reach out.
Daniel Turner
Your article provides a clear roadmap for scraping PHP web pages. The step-by-step process will be valuable for my projects. Thanks, George!
George Forrest
You're welcome, Daniel! I'm glad my article provides a clear roadmap for your PHP web scraping projects. If you have any questions or need guidance while implementing the step-by-step process, feel free to ask.
Emily James
As someone new to web scraping, your article brings clarity to the PHP scraping process. It's a great starting point. Thanks, George!
George Forrest
I'm glad you think so, Emily! Bringing clarity to the web scraping process for beginners is important. If you have any questions or need any further clarification, feel free to ask.
Oscar Clark
The step-by-step process you shared is well-explained and easy to follow. It will definitely enhance my PHP web scraping workflow. Thanks, George!
George Forrest
Thank you, Oscar! I'm glad you found the step-by-step process well-explained and easy to follow. If you need any assistance or have questions while enhancing your PHP web scraping workflow, feel free to ask.
Aria Roberts
Your article provides valuable insights for scraping PHP web pages efficiently. The visuals make it easier to understand. Great job, George!
George Forrest
Thank you, Aria! Providing valuable insights and enhancing understanding through visuals are important aspects for me. If you have any questions or need any further information, feel free to ask.
Caleb Phillips
Your article gives practical instructions for scraping PHP web pages. The examples make it easy to apply in real-world scenarios. Thanks, George!
George Forrest
You're welcome, Caleb! Practical instructions and real-world examples are valuable for application. If you have any questions or need any further assistance, feel free to reach out.
Hannah Davis
The insights you shared in your article will be valuable for my PHP web scraping tasks. Thanks for sharing your expertise, George!
George Forrest
You're welcome, Hannah! I'm glad the insights will be valuable for your PHP web scraping tasks. If you have any questions or need any guidance, feel free to ask.
Alexander Reed
Your article simplifies the process of scraping PHP web pages. The step-by-step approach is easy to comprehend. Thanks, George!
George Forrest
Thank you, Alexander! Simplifying the scraping process and ensuring it's easy to comprehend are important. If you have any questions or need any further assistance, feel free to ask.

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