PHP Constants

• A constant is a identifier or name for a simple value.The value of  php constant do not change during the execution of script.
• Constant are case sensitve.
• It became easy to understand after reading this example shown below:

<?define( “SITE”,  “fullyhelp.com”); define(“AUTHOR”,  “libra”);echo SITE echo AUTHOR echo SITE. “by” . AUTHOR ?>

• If the php canstant tutorial is not case- sensitive , then this statement couldn’d work.see the example:

<?echo Site;?>

• If you want to make it case- insesitive, then only you may set a third parameter to true

<? define( “SITE”,  “fullyhelp.com”);echo SITE echo Site?>