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Home Backend Development PHP Tutorial 一个关于数组循环的问题

一个关于数组循环的问题

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Jun 23, 2016 pm 01:53 PM
cycle array

现有一数组如下

1

$array = array ('A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd', 'E' => 'e', 'F' => 'f', 'G' => 'g', 'H' => 'h', 'I' => 'i', 'J' => 'j', 'K' => 'k', 'L' => 'l', 'M' => 'm', 'N' => 'n', 'O' => 'o', 'P' => 'p', 'Q' => 'q', 'R' => 'r', 'S' => 's', 'T' => 't', 'U' => 'u', 'V' => 'v', 'W' => 'w', 'X' => 'x', 'Y' => 'y', 'Z' => 'z' );

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需要循环数组实现以下效果

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<table>       <tbody>           <tr>              <td>A</td>              <td>B</td>              <td>C</td>              <td>D</td>              <td>E</td>              <td>F</td>          </tr>         <tr>              <td>a</td>              <td>b</td>              <td>c</td>              <td>d</td>              <td>e</td>              <td>f</td>          </tr>         <tr>              <td>G</td>              <td>H</td>              <td>I</td>              <td>J</td>              <td>K</td>              <td>L</td>          </tr>                     <tr>              <td>g</td>              <td>h</td>              <td>i</td>              <td>j</td>              <td>k</td>              <td>l</td>          </tr>         <tr>              <td>M</td>              <td>N</td>              <td>O</td>              <td>P</td>              <td>Q</td>              <td>R</td>          </tr>         <tr>              <td>m</td>              <td>n</td>              <td>o</td>              <td>p</td>              <td>q</td>              <td>r</td>          </tr>                     <tr>              <td>S</td>              <td>T</td>              <td>U</td>              <td>V</td>              <td>W</td>              <td>X</td>          </tr>         <tr>              <td>s</td>              <td>t</td>              <td>u</td>              <td>v</td>              <td>w</td>              <td>x</td>          </tr>         <tr>              <td>Y</td>              <td>Z</td>              <td></td>               <td></td>               <td></td>               <td></td>           </tr>             <tr>              <td>y</td>              <td>z</td>              <td></td>               <td></td>               <td></td>               <td></td>           </tr>     </tbody>  </table>

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请问各位该如何实现呢


回复讨论(解决方案)

1

$array = array ('A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd', 'E' => 'e', 'F' => 'f', 'G' => 'g', 'H' => 'h', 'I' => 'i', 'J' => 'j', 'K' => 'k', 'L' => 'l', 'M' => 'm', 'N' => 'n', 'O' => 'o', 'P' => 'p', 'Q' => 'q', 'R' => 'r', 'S' => 's', 'T' => 't', 'U' => 'u', 'V' => 'v', 'W' => 'w', 'X' => 'x', 'Y' => 'y', 'Z' => 'z' );for($i=0; $i<count($array); $i+="6)" {="" echo="" '<tr="">', PHP_EOL;  $t1 = array_keys(array_slice($array, $i, 6)) + array_fill(0, 6, '');  $t2 = array_values(array_slice($array, $i, 6)) + array_fill(0, 6, '');  foreach($t1 as $v) {    echo "  $v", PHP_EOL;  }  echo '', PHP_EOL;  echo '', PHP_EOL;  foreach($t2 as $v) {    echo "  $v", PHP_EOL;  }  echo '', PHP_EOL;}</count($array);>

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<tr>  <td>A</td>  <td>B</td>  <td>C</td>  <td>D</td>  <td>E</td>  <td>F</td></tr><tr>  <td>a</td>  <td>b</td>  <td>c</td>  <td>d</td>  <td>e</td>  <td>f</td></tr><tr>  <td>G</td>  <td>H</td>  <td>I</td>  <td>J</td>  <td>K</td>  <td>L</td></tr><tr>  <td>g</td>  <td>h</td>  <td>i</td>  <td>j</td>  <td>k</td>  <td>l</td></tr><tr>  <td>M</td>  <td>N</td>  <td>O</td>  <td>P</td>  <td>Q</td>  <td>R</td></tr><tr>  <td>m</td>  <td>n</td>  <td>o</td>  <td>p</td>  <td>q</td>  <td>r</td></tr><tr>  <td>S</td>  <td>T</td>  <td>U</td>  <td>V</td>  <td>W</td>  <td>X</td></tr><tr>  <td>s</td>  <td>t</td>  <td>u</td>  <td>v</td>  <td>w</td>  <td>x</td></tr><tr>  <td>Y</td>  <td>Z</td>  <td></td>  <td></td>  <td></td>  <td></td></tr><tr>  <td>y</td>  <td>z</td>  <td></td>  <td></td>  <td></td>  <td></td></tr>

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<!--?php  $array = array ('A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd', 'E' => 'e', 'F' => 'f', 'G' => 'g', 'H' => 'h', 'I' => 'i', 'J' => 'j', 'K' => 'k', 'L' => 'l', 'M' => 'm', 'N' => 'n', 'O' => 'o', 'P' => 'p', 'Q' => 'q', 'R' => 'r', 'S' => 's', 'T' => 't', 'U' => 'u', 'V' => 'v', 'W' => 'w', 'X' => 'x', 'Y' => 'y', 'Z' => 'z' );;  $keys = array_chunk(array_keys($array),6);  $values = array_chunk(array_values($array),6);  $newArray = array();  foreach($keys as $key=-->$item){    $newArray[] = $item;    $newArray[] = $values[$key];  }  $html = '' . PHP_EOL;  foreach($newArray as $value){    $tr = ''. PHP_EOL;    for($i=0;$i<6;$i++){      $text = empty($value[$i])?'':$value[$i];      $tr .=  "". PHP_EOL;    }   $tr .= ''. PHP_EOL;   $html .= $tr;  }  $html .= '<table><tbody><tr><td>$text</td></tr></tbody></table>'. PHP_EOL;  echo $html;    ?>

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<table><tbody><tr><td>A</td><td>B</td><td>C</td><td>D</td><td>E</td><td>F</td></tr><tr><td>a</td><td>b</td><td>c</td><td>d</td><td>e</td><td>f</td></tr><tr><td>G</td><td>H</td><td>I</td><td>J</td><td>K</td><td>L</td></tr><tr><td>g</td><td>h</td><td>i</td><td>j</td><td>k</td><td>l</td></tr><tr><td>M</td><td>N</td><td>O</td><td>P</td><td>Q</td><td>R</td></tr><tr><td>m</td><td>n</td><td>o</td><td>p</td><td>q</td><td>r</td></tr><tr><td>S</td><td>T</td><td>U</td><td>V</td><td>W</td><td>X</td></tr><tr><td>s</td><td>t</td><td>u</td><td>v</td><td>w</td><td>x</td></tr><tr><td>Y</td><td>Z</td><td></td><td></td><td></td><td></td></tr><tr><td>y</td><td>z</td><td></td><td></td><td></td><td></td></tr></tbody></table>

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foreach(array_chunk(array_keys($array), 6) as $v){     $len = count($v);     if($len < 6){        $v = array_merge($v, array_fill(0, 6-$len, ''));    }     echo "<tr>\n";  echo "<td>".implode("</td>\n<td>",$v)."</td>\n";    echo "</tr>\n";       $vl = array_map('strtolower', $v);  echo "<tr>\n";    echo "<td>".implode("</td>\n<td>",$vl)."</td>\n";   echo "</tr>\n";   }

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感谢几位大神的回复 小弟收益匪浅, jordan102 版主可能没理解这个问题的本质其实是想隔行显示标题和内容 ,而不是把大写转为小写的问题 ,可能是我给的数组误导了你,不过如果针对我给数组,你的思路也很值得学习, 再次感谢几位

楼主新人啊！加油！过来凑个热闹！

php 有丰富的数组函数，这里再提供一种写法

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$array = array ('A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd', 'E' => 'e', 'F' => 'f', 'G' => 'g', 'H' => 'h', 'I' => 'i', 'J' => 'j', 'K' => 'k', 'L' => 'l', 'M' => 'm', 'N' => 'n', 'O' => 'o', 'P' => 'p', 'Q' => 'q', 'R' => 'r', 'S' => 's', 'T' => 't', 'U' => 'u', 'V' => 'v', 'W' => 'w', 'X' => 'x', 'Y' => 'y', 'Z' => 'z' );$a = array_map(null, array_chunk(array_keys($array), 6), array_chunk($array, 6));foreach($a as $rs)  foreach($rs as $r) {    echo "\n";    if(count($r) < 6) $r = array_pad($r, 6, '');    foreach($r as $v) echo "$v\n";    echo "\n";  }

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一层循环便可。

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$arr = array ('A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd', 'E' => 'e', 'F' => 'f', 'G' => 'g', 'H' => 'h', 'I' => 'i', 'J' => 'j', 'K' => 'k', 'L' => 'l', 'M' => 'm', 'N' => 'n', 'O' => 'o', 'P' => 'p', 'Q' => 'q', 'R' => 'r', 'S' => 's', 'T' => 't', 'U' => 'u', 'V' => 'v', 'W' => 'w', 'X' => 'x', 'Y' => 'y', 'Z' => 'z' );$page = (int)((count($arr)-1)/6)+1;echo '<table border="1"><tbody>';for($i=0; $i<$page; $i++){    echo '<tr>';    echo '<td>'.implode('</td><td>',array_pad(array_keys(array_slice($arr, $i*6, 6)),6,'')).'</td>';    echo '</tr>';    echo '<tr>';    echo '<td>'.implode('</td><td>',array_pad(array_slice($arr, $i*6, 6),6,'')).'</td>';    echo '</tr>';}echo '</tbody></table>';

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