How Can I Efficiently Read and Process Large Files Line by Line in PHP?

Effective File Reading: Handling Large Files Line by Line

When working with large files, it becomes imperative to implement efficient techniques to avoid memory constraints. Loading entire files into memory can result in out-of-memory errors, particularly when dealing with gigabyte-sized files. To overcome this challenge, a suitable approach is to read the file line by line.

Leveraging fgets() for Line-by-Line Reading

The fgets() function provides a convenient solution for reading files line by line without loading the entire file into memory. It reads one line at a time and stores it in a buffer. The following code snippet demonstrates how to use fgets() to read a large file line by line:

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

    fclose($handle);
}

By employing this technique, you can efficiently process large files line by line while avoiding memory-related issues.

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