echo "abc";//字符串

echo "abc$c";//字符串+变量

echo 'abc$c';//字符串 asd$c $c不是变量

echo "abc"."de";

echo "abc","de";

echo $a;

echo $a.$b;

echo $a,$b;

echo $a.$b.$c;

echo $a,$b,$c;

echo "abc{$c}de";

echo "abc{$arr['lo']}";

echo "abc{$obj->a}";

echo "abc".$c."de";

echo "abc".$arr['lo']."de";

echo "abc".$obj->a."de";

echo "abc".func($c)."de";

echo "abc".($a+1)."de";

echo $c."de";

echo $c,"de";

//php多行输出方法

echo <<

"abc"

de

END;

?>

输出简写

=$a?>