9*9乘法表

<?phpecho "99乘法表<br/>";    echo "for循环<br/>";    for ($i = 1; $i <= 9; $i++) {       for ($j = 1; $j <= $i; $j++) {          echo " " . $j . "*" . $i . ‘=‘ .  $i * $j . "　　";       }       echo "<br/>";    }    echo "<br/><br/>";

echo "while循环<br/>";    $m = 1;    while ($m < 9) {        $m++;        $n =1;        while ($n <= $m) {            echo " " . $n . "*" . $m . ‘=‘ .  $n * $m . "　　";            $n++;        }        echo "<br/>";    }    echo "<br/><br/>";

echo "dowhile<br/>";    $x = 1;    do {        $y =1;        do {           echo " " . $x . "*" . $y . ‘=‘ .  $x * $y . "　　";            $y++;        } while ($y <= $x);        $x++;        echo "<br/>";    } while ($x <= 9);    echo "<br/><br/>";

echo "foreach<br/>";    $arr = array(1,2,3,4,5,6,7,8,9);    foreach ($arr as $key=>$val1) {        foreach ($arr as $key => $val2) {            if ($val2 <= $val1) {                echo $val1 . "*". $val2 ."=". $val1 * $val2 . "　　";            }        }        echo "<br/>";    }