进入学习php语言状态。昨日看了一天视频。才能够把这个小口诀表实现。好难啊。

里面有个口诀表的函数、

echo "=============================================
";

for ($a=1;$a<=9;$a++){ //循环输出a a默认值是1 a的值不会大于9 且不断加一

for ($b=1;$b<=$a;$b++){//{b默认值是1 且b值不能大于a值 也就是九 加一运算

/*一开始a等于1的，满足$a<=9 往下运行，b=1，满足$b<=$a，输出echo "$b x $a = $c" ; 当b加一运算后，，不能满足$b<=$a，跳出循环，运行echo "
" 回到$a 循环，a加一 运算 此时a=2 满足$a<=9 。往下运行，b=1，满足$b<=$a，输出echo "$b x $a = $c"，输出后 b加一运算了 等于2还是满足$b<=$a ，继续往下运行，b=2，满足$b<=$a，输出echo "$b x $a = $c"

*/

$c=$a*$b; //定义变量C的值

echo "$b x $a = $c" ; //输出变量b x 变量a 等于变量c

echo " "; //空格

}

echo "
"; //回车

}

/*以上几句代码实现99乘法表

1 x 1 = 1

1 x 2 = 2 2 x 2 = 4

1 x 3 = 3 2 x 3 = 6 3 x 3 = 9

1 x 4 = 4 2 x 4 = 8 3 x 4 = 12 4 x 4 = 16

1 x 5 = 5 2 x 5 = 10 3 x 5 = 15 4 x 5 = 20 5 x 5 = 25

1 x 6 = 6 2 x 6 = 12 3 x 6 = 18 4 x 6 = 24 5 x 6 = 30 6 x 6 = 36

1 x 7 = 7 2 x 7 = 14 3 x 7 = 21 4 x 7 = 28 5 x 7 = 35 6 x 7 = 42 7 x 7 = 49

1 x 8 = 8 2 x 8 = 16 3 x 8 = 24 4 x 8 = 32 5 x 8 = 40 6 x 8 = 48 7 x 8 = 56 8 x 8 = 64

1 x 9 = 9 2 x 9 = 18 3 x 9 = 27 4 x 9 = 36 5 x 9 = 45 6 x 9 = 54 7 x 9 = 63 8 x 9 = 72 9 x 9 = 81

*/

?>

echo "=============================================
";

for ($x=9;$x>=1;$x-- ){

for ($y=9;$y>=$x;$y--){

$z=$x*$y;

echo "$y X $x =$z";

echo " ";

}

echo "
";

}

?>

echo "=============================================
";

function cheng($a,$b=9){

//a是一个乘数；b是另一个乘数，初始值是9

for ($x=$a;$x<=$b;$x++){

for ($y=1;$y<=$x;$y++){

$z=$y*$x;

echo "$y X $x =$z";

echo " ";

}

echo "
";

}

}

echo cheng(3,7); 调用了函数

echo "=============================================
";

echo cheng(1 );

//**********乘法表函数*********

?>

原文：http://kinpui.blog.51cto.com/6062354/1357770