In this case, the type of a variable is determined by the value it stores. That is to say, if a string is assigned to variable $var , then $var is of type ...

Types ¶. Table of Contents ¶. Introduction · Type System · NULL · Booleans · Integers · Floating point numbers · Strings · Numeric strings · Arrays ...

Type System · Introduction · Enumerations · Void

PHP Manual ¶ · Basic syntax · Types · Variables · Constants · Expressions · Operators · Control Structures · Functions ...

If you want to get the filename requested on a global error page like a 404, just use this code... ... $page = $HTTP_SERVER_VARS["QUERY_STRING"]; // part[1] is ...

URLs ¶. Introduction · Installing/Configuring · Requirements · Installation · Runtime Configuration · Resource Types · Predefined Constants · URL Functions.

Nov 14, 2012 · I'm pretty sure PHP dynamically knows whether or not it should be a string or not. You cannot declare it's type. – Query. Nov 14, 2012 at 23:08.

This function parses a URL and returns an associative array containing any of the various components of the URL that are present.

Parse_url · Predefined Constants · Parse_str · Http_build_query

PHP is a dynamically typed language, which means that by default there is no need to specify the type of a variable, as this will be determined at runtime.