seld/jsonlint
seld/jsonlint is a PHP JSON parser/linter that provides clear, line-based parse error messages. Lint or parse JSON with exceptions, detect or collect duplicate keys, parse to assoc arrays, and optionally allow comments—ideal for validating user-edited JSON.
Architecture fit: Standalone utility with PSR-4 compliance, ideal for JSON validation layers in PHP applications. Well-suited for error handling scenarios where native json_decode fails, as demonstrated by Composer's usage. No framework dependencies make it universally applicable across PHP stacks.
Integration feasibility: Simple Composer installation with minimal code changes required. Must be used exclusively as a fallback for json_decode failures to avoid performance penalties. API is straightforward with clear exception handling patterns.
Technical risk: Significant performance overhead if misused for all JSON parsing (2-5x slower than native). Potential edge cases in malformed JSON handling (e.g., unclosed strings, extreme nesting). Dependency on third-party for critical error messaging introduces single point of failure if bugs emerge.
Key questions: What is the expected error rate in production JSON processing? How does
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