{"topics":[{"label":"Prevent SQL injection","q":"prevent sql injection"},{"label":"Hash a password","q":"hash a password"},{"label":"readonly properties","q":"readonly properties"},{"label":"match vs switch","q":"match vs switch"},{"label":"Enums","q":"enums"},{"label":"?? and ??=","q":"null coalescing"},{"label":"== vs ===","q":"equality"},{"label":"try \/ catch","q":"exceptions"},{"label":"JSON encode & decode","q":"json"},{"label":"Sort an array","q":"sort an array"},{"label":"Dates & time zones","q":"dates"},{"label":"Read & write files","q":"read a file"},{"label":"Composer & autoloading","q":"composer"},{"label":"Spread & named args","q":"variadic"},{"label":"array_map vs foreach","q":"array_map vs foreach"}]}