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A string is series of characters, where a character is the same as a byte. This means that PHP only supports a 256-character set, and hence does not offer native Unicode support. See details of the string type.Note: string can be as large as up to 2GB (2147483647 bytes maximum)Syntax ¶A string literal can be specified in four different ways:single quoteddouble quotedheredoc syntaxnowdoc syntax (..

Floating point numbers (also known as "floats", "doubles", or "real numbers") can be specified using any of the following syntaxes:Formally:LNUM [0-9]+ DNUM ([0-9]*[\.]{LNUM}) | ({LNUM}[\.][0-9]*) EXPONENT_DNUM [+-]?(({LNUM} | {DNUM}) [eE][+-]? {LNUM}) The size of a float is platform-dependent, although a maximum of ~1.8e308 with a precision of roughly 14 decimal digits is a common value (the 64..

An integer is a number of the set ℤ = {..., -2, -1, 0, 1, 2, ...}.Syntax ¶Integers can be specified in decimal (base 10), hexadecimal (base 16), octal (base 8) or binary (base 2) notation, optionally preceded by a sign (- or +).Binary integer literals are available since PHP 5.4.0.To use octal notation, precede the number with a 0 (zero). To use hexadecimal notation precede the number with 0x. T..

boolean boolean 은 참(TRUE)과 거짓(FALSE)값을 표현합니다.