php define

define sets the constant (has three parameters)

1: The first parameter is the name of the constant

2: The second parameter is the value of the constant

3: The optional third parameter specifies whether the constant name is correct in size Write sensitively. The default is false.

Source code:

define("a","this test for define");

echo a;

echo A;

?>

output:

this test for define

A

Source code:

define ("A","A different from a",true);

echo a;

?>

Output:

The above introduces php define, including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.