How to read a large file line by line in PHP?

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Sometimes, we want to read a large file line by line in PHP.

In this article, we’ll look at how to read a large file line by line in PHP.

How to read a large file line by line in PHP?

To read a large file line by line in PHP, we call the fopen function.

For instance, we write

$handle = fopen("inputfile.txt", "r");
if ($handle) {
    while (($line = fgets($handle)) !== false) {
        // ...
    }

    fclose($handle);
} else {
    // ...
} 

to call fopen with the path to the file we want to read and the permission string.

'r' stands for read.

Then we call fgets with the $handle to read the file and get the next $line from the file.

We do that in the while loop header to read all the $lines until $line is false.

Then we call fclose to close the file.

If $handle is false, then the file can’t be read.

Conclusion

To read a large file line by line in PHP, we call the fopen function.

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