PHP

Dealing with Forms: A simple HTML form NULL: A variable is considered to be null if Escaping from HTML: Advanced escaping using conditions array array|object Variables in PHP: Assign by reference boolean callable callback PHP: Comments float: Comparing floats Variable parsing: Complex (curly) syntax Compound types Converting to boolean: Considered FALSE boolean: Converting to boolean integer: Converting to integer object: Converting to object resource: Converting to resource String: Converting to string PHP: Dealing with Forms Syntax: Double quoted PHP: Escaping from HTML float float: Floating point precision resource: Freeing resources Heredoc syntax: Heredoc in arguments Syntax: Heredoc syntax PHP tags: If a file contains only PHP code integer integer: Integer literals integer: Integer overflow iterable iterable: Iterable Type Variance array: Key casts mixed NaN Syntax: Nowdoc syntax NULL number (pseudo-type) object object: Object Initialization callback: Passing PHP PHP primitive types PHP tags PHP types Predefined Variables Pseudo-types resource Scalar types array: Short array syntax Variable parsing: Simple syntax Syntax: Single quoted Special types array: Specifying with array() String String: String access and modification by character NULL: Syntax String: Syntax PHP: Three main areas where PHP scripts are used String: Variable parsing Variables in PHP void PHP: Your first PHP-enabled page