[PHP典型模塊與項目實戰大全]-第三章(PHP系統(內建)常數)

 

code2html：http://tohtml.com/

 

PHP系統(內建)常數

 

<?php
echo "The path of the current file is ".__FILE__;
echo "<br>";
define("WEATHER","Sunny");
define("INTEREST_RATE",6.52);
/////////////////////////
echo WEATHER;
///////////////////////////
echo "<br>";
$amountToBeExchanged=100;
$AmountAfterExchange= INTEREST_RATE *$amountToBeExchanged;
echo $AmountAfterExchange;
echo "<br>";
echo "Constant __LINE__ is used in line ".__LINE__;
?>

 注意事項:
 __FILE__：印出檔案路徑
 __LINE__：印出目前行號
 字串和常數相加可用「.」