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PHP generally follows C syntax, with exceptions and enhancements for its main use in web development, which makes heavy use of string manipulation. PHP variables must be prefixed by " $ ". This allows PHP to perform string interpolation in double quoted strings, where backslash is supported as an escape character.
For a full list of editing commands, see Help:Wikitext. For including parser functions, variables and behavior switches, see Help:Magic words. For a guide to displaying mathematical equations and formulas, see Help:Displaying a formula. For a guide to editing, see Wikipedia:Contributing to Wikipedia. For an overview of commonly used style ...
Ctrl+5 (numeric keypad) or Function+Ctrl+I (laptop) ≣ Menu: ≣ Menu or ⇧ Shift+F10: Toggle selected state of focused checkbox, radio button, or toggle button Space: Space: Space: Space: Activate focused button, menu item etc. ↵ Enter: Space (also ↵ Enter [notes 5] for menu items) ↵ Enter: ↵ Enter: Expand a drop-down list F4 or Alt+↓
Mathematical notation is widely used in mathematics, science, and engineering for representing complex concepts and properties in a concise, unambiguous, and accurate way. For example, the physicist Albert Einstein 's formula is the quantitative representation in mathematical notation of mass–energy equivalence. [ 1 ]
PHP has a direct module interface called SAPI for different web servers; [273] in case of PHP 5 and Apache 2.0 on Windows, it is provided in form of a DLL file called php5apache2.dll, [274] which is a module that, among other functions, provides an interface between PHP and the web server, implemented in a form that the server understands. This ...
t. e. The markup language called wikitext, also known as wiki markup or wikicode, consists of the syntax and keywords used by the MediaWiki software to format a page. (Note the lowercase spelling of these terms. [a]) To learn how to see this hypertext markup, and to save an edit, see Help:Editing.
propositional logic, Boolean algebra, first-order logic. ⊥ {\displaystyle \bot } denotes a proposition that is always false. The symbol ⊥ may also refer to perpendicular lines. The proposition. ⊥ ∧ P {\displaystyle \bot \wedge P} is always false since at least one of the two is unconditionally false. ∀.
Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...