[PHP典型模塊與項目實戰大全]-第三章(PHP變數 宣告/回收)

 

code2html：http://tohtml.com/

 

PHP變數 宣告/回收

<?php
$rate=6.75;
$_quoted="This sentence is quoted.";
$Rate=7.25;
echo "rate=".$rate;
echo "<br>";
echo "Rate=".$Rate;
echo "<br>";
echo "_quoted =".$_quoted;
echo"<br>";
unset($_quoted);//回收
echo "_quoted =".$_quoted;//會出現錯誤提示
?>