php基本操作echo

 

echo "asd";//字符串
echo "ads$c";//字符串+变量 
echo 'ads$c';//字符串 asd$c            $c不是变量

echo "sd"."vs";
echo "sd","vs";

echo $a;
echo $a.$b;
echo $a,$b;
echo $a.$b.$c;
echo $a,$b,$c;

echo "kaskd{$c}asd";
echo "kakskd{$arr['lo']}";
echo "kakskd{$obj->a}";

echo "kaskd".$c."kasd";
echo "kaskd".$arr['lo']."kasd";
echo "kaskd".$obj->a."kasd";
echo "kaskd".func($c)."kasd";
echo "kaksk".($a+1)."dkkasd";

echo $c."jaksd";
echo $c,"jaksd";


　　echo <<<END
　　This uses the "here document" syntax to output
　　END;

 

　　

<?php echo $a;?> 　　<?=$a?>