Terms starting with "F"
Forced Browsing
PHP 5.0+
Accessing resources at predictable URLs that are not linked from the application's UI but lack proper authorisation checks.
CWE-425 OWASP A1:2021
6mo ago
Security beginner
7.5
Foreign Keys & Referential Integrity
PHP 5.0+
1
A foreign key is a column that references the primary key of another table, enforcing referential integrity — no orphaned rows pointing to non-existent parents.
6mo ago
Database intermediate
Full-Text Search
PHP 5.0+
2
Efficient natural-language search across text fields using inverted indexes — far faster than LIKE '%query%' for large datasets.
6mo ago
Performance intermediate
Functional Array Methods (JS)
ES2015
2
map, filter, reduce, find, flatMap, every, some — JavaScript's built-in higher-order array methods for expressive data transformation.
6mo ago
JavaScript beginner
Fuzzy Search
9
Matching strings that are similar but not identical — tolerating typos, transpositions, and misspellings using edit distance algorithms.
6mo ago
Search intermediate