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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.
// Outside of a class definition
define('foo', 'Value!');
echo foo; // Prints "Value!"
// Inside a class definition
class example {
const bar = "Value!";
}
echo example::bar; // Prints "Value!"
?>
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How do you define a constant in PHP?
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Are you required to initiate a variable when you first declare it in php?
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No
