echo '10'+'abc'+（12+3）+‘1’+‘q; 请问 adc q 去哪里啦 还有 双引号 单引号的区别
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>php语句结束符</title>
</head>
<body>
<p>
<?php
echo "欢迎同学们！";
echo "Welcome" . " to imooc!";
echo '10'+'abc'+(12+3)+1+'q' ;
?>
</p>
</body>
</html>
