一个关于数组循环的问题

$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' );

<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>

$array = array ('A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd', 'E' => 'e', 'F' => 'f', 'G' => 'g', 'H' => 'h', 'I' => 'i', 'J' => 'j', 'K' => 'k', 'L' => 'l', 'M' => 'm', 'N' => 'n', 'O' => 'o', 'P' => 'p', 'Q' => 'q', 'R' => 'r', 'S' => 's', 'T' => 't', 'U' => 'u', 'V' => 'v', 'W' => 'w', 'X' => 'x', 'Y' => 'y', 'Z' => 'z' );for($i=0; $i', 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;}

<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>

$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 .= '
$text
'. PHP_EOL;  echo $html;    ?> 

<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> 

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";	 }

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

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