[读书笔记]Begining PHP5 and MySQL5 From Novoice to Professional
1.printf("","")和sprintf("","")格式有,%b%c%d%f%o%s%u%x%X2.is_array()is_bool()is_float/integer/null/numeric/object/resource/scalar/string() is_scarlar是否为标量:包含了integer,floeat,string或者boolean的是标量,而array,o