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As in C, variables may be cast to a specific type by prefixing the type in parentheses. PHP treats newlines as whitespace, in the manner of a free-form language. The concatenation operator is . (dot). Array elements are accessed and set with square brackets in both associative arrays and indexed arrays.
PHP has a direct module interface called SAPI for different web servers; [272] in case of PHP 5 and Apache 2.0 on Windows, it is provided in form of a DLL file called php5apache2.dll, [273] 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 ...
Two types of literal expression are usually offered: one with interpolation enabled, the other without. Non-interpolated strings may also escape sequences, in which case they are termed a raw string, though in other cases this is separate, yielding three classes of raw string, non-interpolated (but escaped) string, interpolated (and escaped) string.
Hack extends the type hinting available in PHP 5 through the introduction of static typing, by adding new type hints (for example, for scalar types such as integer or string), as well as by extending the use of type hints (for example, for class properties or function return values). However, types of local variables cannot be specified. [6]
An echo question is a question that seeks to confirm or clarify another speaker's utterance (the stimulus), by repeating it back in some form. For example: A: I'm moving to Greenland. B: You're moving where? In English, echo questions have a distinctive prosody, featuring a rising intonation. A speaker may use an echo question to seek ...
In PHP, here documents are referred to as heredocs. In PHP heredocs are not string literals. Heredoc text behaves just like a double-quoted string, but without the double quotes. For example, meaning `$` will be parsed as a variable start, and `${` or `{$` as a complex variable start.
Animate text and images in their document. Embed a ticker or other dynamic display that automatically refreshes its content with the latest news, stock quotes, or other data. Use a form to capture user input, and then process, verify and respond to that data without having to send data back to the server. Include rollover buttons or drop-down ...
echo -n in Version 7 replaced prompt, (which behaved like echo but without terminating its output with a line delimiter). [17] On PWB/UNIX and later Unix System III, echo started expanding C escape sequences such as \n with the notable difference that octal escape sequences were expressed as \0ooo instead of \ooo in C. [18]