Answer
Use streaming functions like fopen and fgets, and generators to avoid loading entire files into memory.
Quick Answer
Large file processing: use fopen() with fgets() to read line by line instead of loading all into memory. Use SplFileObject for OOP iteration. For CSV, use fgetcsv(). Use PHP generators to yield lines one at a time. For very large files use stream filters. Process in chunks and commit DB transactions in batches. Monitor memory_get_usage(). Never use file() or file_get_contents() on large files.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ