PHP 8.1: Memory Exhaustion scenarios When Processing Large CSV Files with fgetcsv
I'm following best practices but I'm working through a tutorial and I'm prototyping a solution and I'm working through a tutorial and I tried several approaches but none seem to work..... I'm working on a personal project and I'm stuck on something that should probably be simple... I'm working with a `PHP Fatal behavior: Allowed memory size of 134217728 bytes exhausted` when trying to process a large CSV file (over 1GB) using the `fgetcsv` function in PHP 8.1. The CSV has over a million rows, and I'm attempting to read it line-by-line to insert the data into my MySQL database. I've tried increasing the memory limit in my `php.ini` file to 256MB, but the behavior continues. Here's a snippet of the code I'm using: ```php $filename = 'large_data.csv'; $handle = fopen($filename, 'r'); if ($handle !== false) { while (($data = fgetcsv($handle, 1000, ',')) !== false) { // Assume $data has the expected number of fields // Preparing a statement for insertion $stmt = $pdo->prepare('INSERT INTO my_table (field1, field2) VALUES (?, ?)'); $stmt->execute([$data[0], $data[1]]); } fclose($handle); } else { echo 'Could not open the file.'; } ``` I considered using `fgetcsv` inside a generator to yield rows instead of loading them all at once, but I'm not sure how to implement that in this context. Could someone suggest a way to handle large files more efficiently, perhaps by optimizing memory usage or processing the data in smaller chunks? I've also read about using `LIMIT` in SQL queries, but that seems more applicable to database fetching rather than CSV reading. Any insights would be appreciated! My development environment is Windows. This is part of a larger API I'm building. Has anyone else encountered this? My development environment is Windows 10. Thanks, I really appreciate it! I'm coming from a different tech stack and learning Php. The stack includes Php and several other technologies. Is there a better approach?