PHP examples: define()

bool define(string, mixed)

if (!@define('AnArray', array())) // It's not allowed to assign an array to a constant { echo "A constant must be a scalar.\n"; } define('DOZEN', 12); echo DOZEN; echo "\n"; if (defined('dozen')) { // This block is never executed because constant identifiers are case-sensitive by default echo dozen; echo "\n"; }

bool define(string, mixed, bool)

define('DOZEN', 12, TRUE); // Defined as case-insensitive echo DOZEN; echo "\n"; if (defined('dozen')) { // 'dozen' is equivalent to 'DOZEN' echo dozen; echo "\n"; }