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PHP
Stream Large CSV with Generator
Iterate over a CSV file row-by-row without ever loading the whole file into memory. Uses a generator so consumers can foreach naturally and PHP cleans up the file handle.
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PHP
JSON Lines (NDJSON) Stream Reader
Read newline-delimited JSON (one object per line) as a generator. Each yield gives you the next decoded record without holding the whole file in memory.
Python
Stream Large CSV with DictReader
Iterate over a CSV row-by-row as a dict — never loading the whole file. Tolerant of UTF-8 BOMs (utf-8-sig). Generator wrapper makes consumers naturally use for/break.