PHP Magic Constant examle - Phptpoint.com — phptpoint.com

PHP Magic Constant 
 
 There are a number of predefined constants available to your scripts. We will use these constants as we need them; there's a sample:
 
 PHP: Magic Constant 
 
 
 
 
 PHP Magic Constant
 
 
 __LINE__
 The current line number of the file.
 
 
 __FILE__
 The full path and filename of the file.
 
 
 __FUNCTION__
 The function name
 
 
 __CLASS__
 The class name
 
 
 __METHOD__
 The class method name
 
 
 PHP_VERSION
 The PHP version
 
 
 PHP_INT_MAX
 The PHP integer value limit
 
 
 
 
 __LINE__ 
 
 The current line number of the file.
 
 
 
 <?php
 
 echo "The Line number : ". __LINE__;
 
 ?>
 
 
 
 
 Output The Line number : 2
 
 __FILE__ 
 
 The full path and filename of the file.
 
 
 
 <?php
 
 echo "Your file name :". __FILE__;
 
 ?>
 
 
 
 
 Output Your file name : C:xampplitehtdocsmagic_constantfile.php
 
 __FUNCTION__,     __CLASS__,     __METHOD__ 
 
 The function name The class name The class method name
 
 
 
 <?php
 
 class demo
 
 {
 
 function test()
 
 {
 
 echo "Function of demo class : ". __FUNCTION__ ."<br/>";
 
 }
 
 function testme()
 
 {
 
 echo "Method of demo class : ". __METHOD__ ."<br/>";
 
 echo "Class : ". __CLASS__;
 
 }
 
 }
 
 $object=new demo();
 
 $object->test();
 
 $object->testme();
 
 ?>
 
 
 
 
 Output Function of demo class : test Method of demo class : demo::testme Class : demo
 
 PHP_VERSION 
 
 The PHP version
 
 
 
 <?php
 
 echo "Current PHP Version you are using : ".PHP_VERSION;
 
 ?>
 
 
 
 Output Current PHP Version you are using : 5.3.1
 
 PHP_INT_MAX 
 
 The PHP integer value limit
 
 
 
 <?php
 
 echo "Integer Maximum Value : ".PHP_INT_MAX;
 
 ?>
 
 
 
 
 Output Integer Maximum Value : 2147483647

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