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Constants In PHP

Software Requirement

  1. XAMPP is installed on your machine
  2. Any text editor like Notepad

Technical Knowledge

What Do You Mean By Constant?

Rules For Making Constant


define(constant_name, constant_value,is_case_insensitive);

  1. First parameter is the name of the constant
  2. Second parameter is the value of the constant
  3. Third one is the optional parameter that specifies if the constant name is case insensitive or not. By default, the value is false which means that the constant name is case sensitive


define("PIE", "3.14", true);
echo pie

define("PIE", "3.14");
echo pie

Posted By  -  Karan Gupta
Posted On  -  Monday, September 8, 2014


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