PHP學習筆記(1)-變數與字串

字串的表示可以用" "或' '，不同處在於在" "中若出現已宣告的變數，會將其代號轉換成變數內容，而' '則不會。
(You can use also " " or ' ' to present a string, the difference is that if there are any variables in the string with " ", the output will be the content of the variable, although ' ' will only print the name of it.)

Ex:
   $test1 = "hi";
   $op1 = "$test1 ,I am handsome <br/>";
   $op2 = '$test1 ,I am handsome';

   echo $op1;
   echo $op2;

   輸出(output)：
   hi ,I am handsome
   $test1 ,I am handsome

也可以用 . 來連接變數及字串。
(You may use . to combine variable and string, too.)

Ex:
   $test1 = "hi";
   $op1 = $test1 . " ,I am handsome <br/>";
   $op2 = $test1 . ' ,I am somehand';

   echo $op1;
   echo $op2;

   輸出(output)：
   hi ,I am handsome
   hi ,I am somehand