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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.
Prior to PHP 5.4.0, this short syntax for echo only works with the short_open_tag configuration setting enabled, while for PHP 5.4.0 and later it is always available. [ 214 ] [ 215 ] [ 211 ] The purpose of all these delimiters is to separate PHP code from non-PHP content, such as JavaScript code or HTML markup. [ 216 ]
Type. Command. In computing, echo is a command that outputs the strings that are passed to it as arguments. It is a command available in various operating system shells and typically used in shell scripts and batch files to output status text to the screen [1] or a computer file, or as a source part of a pipeline.
Hack is a programming language for the HipHop Virtual Machine (HHVM), created by Meta (formerly Facebook) as a dialect of PHP. The language implementation is open-source, licensed under the MIT License. [2][3][4] Hack allows programmers to use both dynamic typing and static typing. This kind of a type system is called gradual typing, which is ...
Working directory. In computing, the working directory of a process is a directory of a hierarchical file system, if any, [nb 1] dynamically associated with the process. It is sometimes called the current working directory (CWD), e.g. the BSD getcwd[1] function, or just current directory. [2] When a process refers to a file using a simple file ...
Ctrl/⌘ + F. Opens a search box to find a specific word, phrase, or figure on the page. Ctrl/⌘ + N. Create or launch a new document, file, or window, depending on the program. Ctrl/⌘ + S. Use ...
Most keyboard shortcuts require the user to press a single key or a sequence of keys one after the other. Other keyboard shortcuts require pressing and holding several keys simultaneously (indicated in the tables below by the + sign). Keyboard shortcuts may depend on the keyboard layout.
Short-circuit evaluation, minimal evaluation, or McCarthy evaluation (after John McCarthy) is the semantics of some Boolean operators in some programming languages in which the second argument is executed or evaluated only if the first argument does not suffice to determine the value of the expression: when the first argument of the AND function evaluates to false, the overall value must be ...