Php Curl Web Scraping Example

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Web Scraping With Python

Let’s now make a request using the grabbed URL and examine how the returned data looks like. This will assist in creating the scraping logic in the next step. We’ll use the PHP cURL library to make a GET request and retrieve the Google Maps data. Jan 02, 2015 If your are using PHP = 5.5, file upload like this (with ‘@’) probably won’t work, since they added SAFEUPLOAD CURL option and CURLFile class which you should use instead of ‘@’filename. Check this for more info on this topic. My example is built for PHP. In this article, I will discuss how to download and save image files with PHP/cURL web scraper. I will use email extractor script created earlier as example. With some modification, the same script can then be used to extract product information and images from Internet shopping websites such as eba. In this tutorial you will learn how to scrape the data from websites with Zenscrape API using PHP. You can also integrate the API with other programming languages like Python, Nodejs, Go, Ru by etc. The Zenscrape API provides hassle free data extraction solution to scrape the data from web pages into your desired format.

Using grep, curl, and tail to scrape data from a Web page

Posted on: Sunday, Feb 04, 2018

Another post on this blog provides a Bash script that automates the installation of the most recent version of Firefox Developer Edition (FFDE). The original version of that script required the manual input of FFDE's latest version number. Looking up that number was a hassle to the say the least--and added lots of friction to a process that should simple and fast.

Rather than require you to look up the most recent version number and then provide that value as argument to the Bash script, the script now uses three of the really handy utilities that lurk within Linux. curl, grep, and tail work together to fetch the most recent version number from the FFDE downloads page. This post goes into the detail of how that script uses these Linux utilities to get the latest FFDE version number. With these in place, running that script is quite simple now.

You can read more about curl, grep, and tail here:

curl - transfer the contents of a URL
grep - find lines matching a pattern
tail - output the last part of files

Scraping data from a Web page

Mozilla provides a 'releases' download page that shows the versions of FFDE available. The most recent version number is the last number in the list. Visit the releases page to see it. There isn't much to it, it's mostly just a list of version numbers.

Follow each of these steps by clicking the clipboard icon to copy a line to your clipboard then pasting it in a terminal session to run it.

In an open a terminal session pull down the FFDE release page's HTML with curl:

Use curl to see the release page's HTML.

This script needs that HTML in a text file, so it uses curl's -o flag to specify an output file:

Use curl to save the release page's HTML in the releases.txt file.

With the releases.txt file available, we'll run grep against that file to extract the version numbers from it. To do so, grep uses a simple regular expression that matches a FFDE version number (59.0b6. for example), where [0-9] specifies a single numeric digit, . looks for a single period (unescaped, the . means any character to regex), and [a-z] specifies a letter from between a and z.

Use grep to see the version numbers in a terminal.

This list is all of the version numbers (with each one repeated twice), but we only need the last number (the most recent version) in the list. To get the last number, grep pipes its output into the tail command.

Pipe grep's output into the tail command to get the last number (the last line of the file).

The last bit of this step is get the most recent version number into a Bash variable for use in a Bash script. This is done with Bash's substitution operator, $(...).

Capture the most recent version number in a Bash variable and show it.