function isosceles($line,$sing){ $tab ='='; for($i=1;$i < $line+1;$i++){ $blank = print_blank($i,$line,$tab); $code = print_code($i,$sing); echo $blank.$code.$blank."<br>"; } } function print_blank($num,$line,$tab){ $blank =''; for($i=$num;$i<$line;$i++){ $blank.=$tab; } return $blank; } function print_code($num,$sing){ $code =''; for($i=0;$i<(2*($num-1)+1);$i++){ $code.=$sing; } return $code; } $line = 5; $sing = "*"; isosceles($line,$sing);
运行结果如下：
====*====
===***===
==*****==
=*******=
*********