PHP乘法表 - 需要循环添加一行（16x16）

时间：2018-03-06 04:06:19

标签： php

我的目标是让我的PHP乘法表看起来像这样：9x9 array with "x" and bolded numbers：

enter image description here

但相反，我的数组目前看起来像这样：9x9 array with x on the top row and no bolded numbers

到目前为止，这是我的代码：

enter image description here 

<?php
echo "<table border =\"1\" style='border-collapse: collapse'>"; //creating the border outline
echo "<td> x </td>";
for ($row=1; $row <= 16; $row++) {  // first loop
echo "<tr> \n";
for ($col=1; $col <= 16; $col++) { //2nd loop
  $p = $col * $row; //computing values
  echo "<td>$p</td> \n";
  }
     echo "</tr>";
}
echo "</table>"; //closing the table
?>

我知道我需要第三个for循环来帮助加粗第一行和第一列中的数字，并且正确地包含“x”，这样它就不像目前那样位于我的数组之上。任何人都可以帮我解决这个问题吗？谢谢！ ：）

2 个答案:

答案 0 :(得分：1)

您必须添加第一行和第一列。像：

<?php
echo "<table border =\"1\" style='border-collapse: collapse'>"; //creating the border outline

    //Add the first row
    echo "<tr style='font-weight: bold;'>";
        echo "<td >X</td> \n";
        for ($col=1; $col <= 16; $col++) {
            echo "<td>$col</td> \n";
        }
    echo "</tr>";

    for ($row=1; $row <= 16; $row++) {  // first loop
        echo "<tr> \n";

        //Adding the first column
        echo "<td style='font-weight: bold;'>$row</td>";

        for ($col=1; $col <= 16; $col++) {
            $p = $col * $row; //computing values
            echo "<td>$p</td> \n";
        }

        echo "</tr>";
    }
echo "</table>"; //closing the table
?>

这将导致：

＆＃13;
＆＃13; 
<table style="border-collapse: collapse" border="1"><tr style="font-weight: bold;"><td>X</td> 
<td>1</td> 
<td>2</td> 
<td>3</td> 
<td>4</td> 
<td>5</td> 
<td>6</td> 
<td>7</td> 
<td>8</td> 
<td>9</td> 
<td>10</td> 
<td>11</td> 
<td>12</td> 
<td>13</td> 
<td>14</td> 
<td>15</td> 
<td>16</td> 
</tr><tr> 
<td style="font-weight: bold;">1</td><td>1</td> 
<td>2</td> 
<td>3</td> 
<td>4</td> 
<td>5</td> 
<td>6</td> 
<td>7</td> 
<td>8</td> 
<td>9</td> 
<td>10</td> 
<td>11</td> 
<td>12</td> 
<td>13</td> 
<td>14</td> 
<td>15</td> 
<td>16</td> 
</tr><tr> 
<td style="font-weight: bold;">2</td><td>2</td> 
<td>4</td> 
<td>6</td> 
<td>8</td> 
<td>10</td> 
<td>12</td> 
<td>14</td> 
<td>16</td> 
<td>18</td> 
<td>20</td> 
<td>22</td> 
<td>24</td> 
<td>26</td> 
<td>28</td> 
<td>30</td> 
<td>32</td> 
</tr><tr> 
<td style="font-weight: bold;">3</td><td>3</td> 
<td>6</td> 
<td>9</td> 
<td>12</td> 
<td>15</td> 
<td>18</td> 
<td>21</td> 
<td>24</td> 
<td>27</td> 
<td>30</td> 
<td>33</td> 
<td>36</td> 
<td>39</td> 
<td>42</td> 
<td>45</td> 
<td>48</td> 
</tr><tr> 
<td style="font-weight: bold;">4</td><td>4</td> 
<td>8</td> 
<td>12</td> 
<td>16</td> 
<td>20</td> 
<td>24</td> 
<td>28</td> 
<td>32</td> 
<td>36</td> 
<td>40</td> 
<td>44</td> 
<td>48</td> 
<td>52</td> 
<td>56</td> 
<td>60</td> 
<td>64</td> 
</tr><tr> 
<td style="font-weight: bold;">5</td><td>5</td> 
<td>10</td> 
<td>15</td> 
<td>20</td> 
<td>25</td> 
<td>30</td> 
<td>35</td> 
<td>40</td> 
<td>45</td> 
<td>50</td> 
<td>55</td> 
<td>60</td> 
<td>65</td> 
<td>70</td> 
<td>75</td> 
<td>80</td> 
</tr><tr> 
<td style="font-weight: bold;">6</td><td>6</td> 
<td>12</td> 
<td>18</td> 
<td>24</td> 
<td>30</td> 
<td>36</td> 
<td>42</td> 
<td>48</td> 
<td>54</td> 
<td>60</td> 
<td>66</td> 
<td>72</td> 
<td>78</td> 
<td>84</td> 
<td>90</td> 
<td>96</td> 
</tr><tr> 
<td style="font-weight: bold;">7</td><td>7</td> 
<td>14</td> 
<td>21</td> 
<td>28</td> 
<td>35</td> 
<td>42</td> 
<td>49</td> 
<td>56</td> 
<td>63</td> 
<td>70</td> 
<td>77</td> 
<td>84</td> 
<td>91</td> 
<td>98</td> 
<td>105</td> 
<td>112</td> 
</tr><tr> 
<td style="font-weight: bold;">8</td><td>8</td> 
<td>16</td> 
<td>24</td> 
<td>32</td> 
<td>40</td> 
<td>48</td> 
<td>56</td> 
<td>64</td> 
<td>72</td> 
<td>80</td> 
<td>88</td> 
<td>96</td> 
<td>104</td> 
<td>112</td> 
<td>120</td> 
<td>128</td> 
</tr><tr> 
<td style="font-weight: bold;">9</td><td>9</td> 
<td>18</td> 
<td>27</td> 
<td>36</td> 
<td>45</td> 
<td>54</td> 
<td>63</td> 
<td>72</td> 
<td>81</td> 
<td>90</td> 
<td>99</td> 
<td>108</td> 
<td>117</td> 
<td>126</td> 
<td>135</td> 
<td>144</td> 
</tr><tr> 
<td style="font-weight: bold;">10</td><td>10</td> 
<td>20</td> 
<td>30</td> 
<td>40</td> 
<td>50</td> 
<td>60</td> 
<td>70</td> 
<td>80</td> 
<td>90</td> 
<td>100</td> 
<td>110</td> 
<td>120</td> 
<td>130</td> 
<td>140</td> 
<td>150</td> 
<td>160</td> 
</tr><tr> 
<td style="font-weight: bold;">11</td><td>11</td> 
<td>22</td> 
<td>33</td> 
<td>44</td> 
<td>55</td> 
<td>66</td> 
<td>77</td> 
<td>88</td> 
<td>99</td> 
<td>110</td> 
<td>121</td> 
<td>132</td> 
<td>143</td> 
<td>154</td> 
<td>165</td> 
<td>176</td> 
</tr><tr> 
<td style="font-weight: bold;">12</td><td>12</td> 
<td>24</td> 
<td>36</td> 
<td>48</td> 
<td>60</td> 
<td>72</td> 
<td>84</td> 
<td>96</td> 
<td>108</td> 
<td>120</td> 
<td>132</td> 
<td>144</td> 
<td>156</td> 
<td>168</td> 
<td>180</td> 
<td>192</td> 
</tr><tr> 
<td style="font-weight: bold;">13</td><td>13</td> 
<td>26</td> 
<td>39</td> 
<td>52</td> 
<td>65</td> 
<td>78</td> 
<td>91</td> 
<td>104</td> 
<td>117</td> 
<td>130</td> 
<td>143</td> 
<td>156</td> 
<td>169</td> 
<td>182</td> 
<td>195</td> 
<td>208</td> 
</tr><tr> 
<td style="font-weight: bold;">14</td><td>14</td> 
<td>28</td> 
<td>42</td> 
<td>56</td> 
<td>70</td> 
<td>84</td> 
<td>98</td> 
<td>112</td> 
<td>126</td> 
<td>140</td> 
<td>154</td> 
<td>168</td> 
<td>182</td> 
<td>196</td> 
<td>210</td> 
<td>224</td> 
</tr><tr> 
<td style="font-weight: bold;">15</td><td>15</td> 
<td>30</td> 
<td>45</td> 
<td>60</td> 
<td>75</td> 
<td>90</td> 
<td>105</td> 
<td>120</td> 
<td>135</td> 
<td>150</td> 
<td>165</td> 
<td>180</td> 
<td>195</td> 
<td>210</td> 
<td>225</td> 
<td>240</td> 
</tr><tr> 
<td style="font-weight: bold;">16</td><td>16</td> 
<td>32</td> 
<td>48</td> 
<td>64</td> 
<td>80</td> 
<td>96</td> 
<td>112</td> 
<td>128</td> 
<td>144</td> 
<td>160</td> 
<td>176</td> 
<td>192</td> 
<td>208</td> 
<td>224</td> 
<td>240</td> 
<td>256</td> 
</tr></table>
＆＃13;
＆＃13;
＆＃13;

答案 1 :(得分：1)

以0开始循环并添加所需输出的条件。试试这段代码，

echo "<table border =\"1\" style='border-collapse: collapse'>"; //creating the border outline
//echo "<td> x </td>";
for ($row = 0; $row <= 16; $row++) { // first loop
    echo "<tr> \n";
    for ($col = 0; $col <= 16; $col++) { //2nd loop
        if($row == 0 && $col == 0)
            echo '<td> x </td>';
        else if ($row == 0 && $col != 0)
            echo "<td>$col</td>";
        else if ($row != 0 && $col == 0)
            echo "<td>$row</td>";
        else {
            $p = $col * $row; //computing values
            echo "<td>$p</td> \n";
        }

    }
    echo "</tr>";
}
echo "</table>"; //closing the table

输出：

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