You can define a constant using the define() directive.
you can use this a number of ways;
to define a variable to a constant do:
$string = "hello";
define("string",$string);
to define a string to a constant use:
define("hello","there");
to define a integer or other numerical value use:
define("number",1.0);
Summery:
to define a string use quotes as you would do a string.
Unlike variables in PHP a constant cannot be changed or undefined once it is defined. Constant remains automatically globally throughout the script. It means that it can be accessed from inside a function. e.g.
define("Program" , "This is my first line of code!");
function simTest() {
echo Program;
}
simTest();
?>
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Constant means an ongoing situation or thing.
if you define y = constant then the slope of any constant is 0 so if you define the line y = 0 the slope of 0 is 0.
The PHP syntax and semantics are the format (syntax) and the related meanings (semantics) of the text and symbols in the PHP programming language. They form a set of rules that define how a PHP program can be written and interpreted. PHP is a procedural and object-oriented language (OOL) for coding webpage markup text to be transformed into HTML format on computerized devices. In later releases, PHP generates some code to be run by the Zend Engine, beyond using just HTML markup text. The syntax of PHP changed to include OOL keywords in versions PHP 3 and PHP 5.
Answer: Php 2510% of Php 250= 10% * Php 250= 0.10 * Php 250= Php 25
Outside of a class definition, constants can be declared with the define function. The function has two arguments; the name of the constant (a string), and the value of the constant (any variable type).Inside a class definition, constants can be declared with the const keyword. Type the word const, the name of the constant in the form of how it will be called later, an "equals sign," then the desired value of the constant.In both cases, here is an example.