Web Scraping Using PHP. We will explore some PHP libraries which can be used to understand how to use the HTTP protocol as far as our PHP code is concerned, how we can steer clear of the built-in API wrappers and in its place, think of using something that is way more simple and easy to manage for web scraping. SCRAPING MULTIPLE DATA POINTS FROM A WEB PAGE. Visiting a web page and scraping one piece of data is hardly impressive, let alone worth building a script for. I mean, you could just as easily open your web browser and copy/paste it for yourself. So, we’ll expand on this a bit and scrape multiple data points from a web page. Web scraping is to extract information from within the HTML of a web page. Web scraping with PHP doesn't make any difference than any other kind of computer languages or web scraping tools, like Octoparse. This article is to illustrate how a beginner could build a simple web crawler in PHP. If you plan to learn PHP and use it for web scraping. PHP CURL Tutorial Made Easy For Beginners👉 GRAB MY COURSE 👈 Do you want to become a web developer from scratch?I have spen. In this tutorial you will learn how to scrape the data from websites with Zenscrape API using PHP. The Zenscrape API provides an easy solution to scrape the web pages data without having any technical knowledge. You can use their visual web scraper with simple options to scrape the data into your desired data format like CSV, JSON etc.
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Web scraping or data mining is a way to get the desired data from web pages programmatically. Most of the businesses uses web scraping systems to get the useful data from other websites to use in their businesses.
As a developer, we sometimes write a simple script to scrape the data from websites. But it’s not an easy task to write complete script as there are so many limitations to pass the process to scrape the data from other websites.
So if you’re running a business or a developer and looking for a complete solution to scrape the websites data, then you’re here at the right place. In this tutorial you will learn how to scrape the data from websites with Zenscrape API using PHP.
The Zenscrape API provides an easy solution to scrape the web pages data without having any technical knowledge. You can use their visual web scraper with simple options to scrape the data into your desired data format like CSV, JSON etc. The Zenscrape API is smart enough to rotates each request with different IPs from different countries all over the world and return only the valid results.
So let’s proceed to integrate Zenscrape API with PHP to scrape the data from websites.
Step1: Get API Key
First we will get the Zenscrape API key to access the API. So first we need to sign up for free to create an account and get the API KEY.
We will use the API Key for the authentication purpose to make HTTP request to Zenscrape API.
Step2: Create Search Query
The API provides many parameters to pass with the API request to scrape the data. So we will create the search query with the required parameters to scrape the data. We will use url parameter with the website URL from which we want to scrape the data. We can also use other useful parameters such location, render and premium and many more to enhance the process.
Step3: Make HTTP Request to Zenscrape API
We need to make HTTP request to Zenscrape API to scrape the data. So we will make HTTP request using PHP Curl library and use the $dataSearchQuery data with the request. We also need to pass API Key to authenticate the API request and get the response data.
Step4: Decode Response Data
We will use the PHP json_decode() function to decode the $responseData data for further use.
Step5: Complete code
Below is the complete code to scrape the data from websites using Zenscrape API with PHP.
Step6: Conclusion
Php Curl Web Scraping Examples
In this tutorial you have learned how to integrate the Zenscrape API with PHP to scrape the data from websites. You can also try the visual web scraper from Zenscrape API to scrape the data for free by creating your account. You can also checkout the documentation> for more options and details.
Screen scraping has been around on the internet since people could code on it, and there are dozens of resources out there to figure out how to do it (google php screen scrape to see what I mean). I want to touch on some things that I've figured out while scraping some screens. I assume you have php running, and know your way around Windows.
- Do it on your local computer. If you are scraping a lot of data you are going to have to do it in an environment that doesn't have script time limits. The server that I use has a max execution time of 30 seconds, which just doesn't work if you are scraping a lot of data off of slow pages. The best thing to do is to run your script from the command line where there is no limit to how long a script can take to execute. This way, you're not hogging server resources if you are on a shared host, or your own server's resources if you are on a dedicated host. Obviously, if your screen scraping data to serve 'on-the-fly', then this senario won't work, but it's awesome for collecting data. Make sure you can run php from the command line by opening up a command prompt window, and type 'php -v'. You should get the version of php you are running. If you get an error message then you'll need to map your PATH environment variable to your php executable.
- Do it once. If you are writing a script that loops through all of the pages on a site, or a lot of pages - make sure your script works right before you execute it. If the host sees what you are doing and doesn't like it, then they could just block you. So it's best to make sure your script runs correctly by doing a small test run. Then when that works, unleash your script on the entire site. In that same vein, don't screen scrape a site all the time. You're just going to piss off the admin if they figure it out.
- Do it smart. Make sure the site doesn't offer an api for doing what you want before you scrape their site. Often, the api can get you the information quicker and in a better format than the screen scrape can.
- Use the cURL library. I really don't know any other way to scrape a page other than to use cURL -- it works so well I just never have had to try anything else. Since you are going to be using php from the command line, you're also going to want to use curl from the command line (it's easier than using the PHP functions, and external libraries are not loaded any way). Get the curl library from http://curl.haxx.se/download.html and download the non ssl version. Map the path to curl.exe in your PATH environment variable, and make sure you can run curl from the command line.
Those are all of my tips. Here is some screen scrape code that I use.
To call curl just write a function like this. This is so much easier than using the php commands, but you probably don't want to use a shell_exec command on a web server where someone can put in their own input. That might be bad. I only use this code when I run it locally.
This is the code that calls the curl function. We start by using the output buffer, this greatly speeds up our code. This particular code would grab the title of a page and print it:
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To run your script from the command line and generate output to a file you simply call it like this:
php my_script_name.php > output.txt
Isotopes of an element have the same number of. Any output captured by the output buffer will be printed to the file you pass the output to.
Php Curl Get Example
This is a very simple example that doesn't even check to see if the title exists on that page before it prints, but hopefully you can use your imagination to expand this into something that might grab all of the titles on an entire site. A common thing that I do is use a program like Xenu Link Sleuth to build my list of links I want to scrape, and then use a loop to go through and scrape every link on the list (in other words, use Xenu for your spider and your code to process the results). This was how I build the Shoemoney Blog Archive list. The challenge and fun with screen scraping is how can you use that data that is out there to your advantage.