Fix filter_input() return value documentation#5381
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kamil-tekiela merged 1 commit intophp:masterfrom Apr 20, 2026
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filter_input() returns null (not false) when the variable is not set. Also clarify the FILTER_NULL_ON_FAILURE behavior which inverts the return values: false when not set, null on filter failure. Fixes php#4361
kamil-tekiela
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Apr 20, 2026
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Fixes #4361
filter_input()returnsnullwhen the variable is not set, notfalse. Also clarifies theFILTER_NULL_ON_FAILUREinverted behavior.Happy to adjust if needed.