ZhuYiBo

1. <?php echo 'if you want to serve XHTML or XML documents, do like this'; ?>2. <script language="php"> </script>3. <?= expression ?> This is a shortcut for "<? echo expression ?>"4. <%= $variable; # Thi

第五章 运算符1、运算符优先级2、算术运算符例子名称结果-$a取反$a 的负值。$a + $b加法$a 和 $b 的和。$a - $b减法$a 和 $b 的差。$a * $b乘