How can PHP handle large data files efficiently without loading everything into memory?

When dealing with large data files in PHP, it's important to avoid loading everything into memory at once to prevent performance issues. One way to handle this efficiently is by reading the file line by line or in chunks, processing the data incrementally without storing it all in memory. 

$filename = 'large_data_file.txt';

$handle = fopen($filename, 'r');

if ($handle) {
    while (($line = fgets($handle)) !== false) {
        // Process each line of data here
    }

    fclose($handle);
} else {
    echo 'Error opening the file.';
}

Keywords

PHP large data files memory management file handling streaming.

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