<?php |
$foo = "foobar" ; |
$bar = "barbaz" ; |
echo $foo , $bar ; // 输出"foobarbarbaz" |
echo "<br />" ; |
echo $foo [3]; // 输出第4个字符"b" |
echo "<br />" ; |
echo "foo is $foo" ; // 输出"foo is foobar" |
echo "<br />" ; |
echo 'foo is $foo' ; // 输出"foo is $foo" |
?> |