Read large text files php

Loading that size file into memory would probably not be a good idea. This should get you around that. The best way to do this is use fread and fgets to read line by line, this is extreamly fast as only one line is read at one time and not the while file:.

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Asked 10 years, 11 months ago. Active 3 years, 8 months ago. Viewed 6k times. I have a text log file, about MB. Improve this question. David David Can you execute external commands? I have root, but ideally its something I want to roll out to my users too Add a comment. Active Oldest Votes. I am here again with another simple and easy PHP tutorial. In this tutorial, I will show you how to read a text file line by line.

Like any other tutorial, I will also show you the simple example code so that you will understand it in a better way. Suppose there is a text file which contains a domain name in each line. For example, suppose the name the text file is domainlist. Now below is the PHP code which will read the text file and echo each domain name from each line by using a while loop:.

Now I am going to show you how to make the domains clickable and arrange it per line. If you work for a company that offers development services even for other companies of the same industry, you may have had this "wonderful" task of importing a huge "database" from a client into the database engine preferred by your company. Obviously, because of the logic that the project required, we couldn't just simply import the file into the database through a tool like PHPMyAdmin, as every row in the CSV should be modificated to fit with our new database design.

To get started, when we talk about huge files, we are not talking about files with 50K or 70K rows, we talk about millions of rows like in this example, with a CSV file of 25GB. So, the correct approach for such cases is not to work with the file directly, but with smaller files. The smaller the file, the better will it be to have an optimal performance and control over your script, not only about the performance perspective but the logic as well.

You can of course do the same using another approach, but, you get the idea right? Split the file into smaller chunks that can be easily processed by your scripts later.

To read the file, we will use the fopen function of PHP, this inbuilt function is used to simply open a file from a local URL, it's used to bind a resource to a steam.