MySQL: the difference between insert ignore, insert and replace

Instructions	Already exists	non-existent	give an example
insert	Report errors	Insert	insert into names(name, age) values(“ Xiao Ming ”, 23);
insert ignore	Ignore	Insert	insert ignore into names(name, age) values(“ Xiao Ming ”, 24);
replace	Replace	Insert	replace into names(name, age) values(“ Xiao Ming ”, 25);

Table requirements ： Yes PrimaryKey, perhaps unique Indexes