1. str_contains(): Checks if a string is contained in another string. $sentence = "The quick brown 🦊 jumps over the lazy 🐶.";$word = "🦊";if (str_contains($sentence, $word)) { echo "The sentence contains the word 🦊.";} 2. str_starts_with(): Checks if a string starts with a given substring. $sentence = "🚀 Launching...