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05 November, 2018

Constants in Hindi

 Programing Coderfunda     November 05, 2018     hindi-php, php     No comments   

Constants in Hindi
Constants की values change नहीं की जा सकती |
PHP Constants के लिए define() function का इस्तेमाल किया जाता है |
define() function पर दो या तीन parameters होते है |

Syntax for define() with two parameters

define('constant_name', "constant_value");

Parameters :
constant_name : यहाँ पर ये constant का नाम है |
constant_value : यहाँ पर ये constant की value है |

Example for define()

Source Code :
1234567<?php
define('VALUE1', "Value 1");
define('VALUE_2', "Value 2");

echo VALUE1."<br />";
echo VALUE_2;
?>
Output :
Value 1
Value 2

एक constant को दूसरे constant पर assign किया जा सकता है |
Source Code :
1234567<?php
define('VALUE1', "Value 1");
define('VALUE_2', VALUE1);

echo VALUE1."<br />";
echo VALUE_2;
?>
Output :
Value 1
Value 1

Syntax for define() with three parameters

define('constant_name', "constant_value", case-insensitive);

Parameters :
constant_name : यहाँ पर ये constant का नाम है |
constant_value : यहाँ पर ये constant की value है |
case-insensitive : अगर यहाँ पर true pass किया जाता है तो constant का नाम case-insensitive हो जाता है और false होता है तो constant का नाम case-sensitive हो जाता है |
Source Code :
12345<?php
define('VALUE', "Value 1", true);

echo value;
?>
Output :
Value 1
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