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三种php表格隔行换色

第一种for{}eles{}:

  

     <?php
          echo "<table width=‘80%‘ border = 1 cellpadding=5 cellspacing=0>";
          for ($i = 1; $i <= 5; $i++){
          if($i % 2 == 0){
          echo ‘<tr align="center" bgcolor="red">‘;
          }else{
          echo ‘<tr align="center">‘;
          }

          for ($j = 1; $j<= 8; $j++){

          echo ‘<td>‘.$i * $j.‘</td>‘;

          }
          echo ‘</tr>‘;
          }
            echo ‘</table>‘;

          ?>

第二种方法while

          

            <?php
              echo "<table width=‘80%‘ border = 1 cellpadding=5 cellspacing=0>";
              $l = 1;
              while ($l <= 5) {
              if ($l % 2 == 0) {
              echo ‘<tr align="center" bgcolor="red">‘;
                }else{
              ‘<tr align="center">‘;
              }

              $m = 1;
              while ($m <= 8) {
                echo ‘<td>‘.$l * $m.‘</td>‘;
              $m++;
              }
              echo ‘</tr>‘;
              $l++;
              }

              ?>

第三种方法do{}while{}

              <?php      

              echo "<table width=‘80%‘ border = 1 cellpadding=5 cellspacing=0>";
              $k = 1;
              do{
              if($k % 2 == 0){
              echo ‘<tr align="center" bgcolor="red">‘;
              }else{
              echo ‘<tr align="center">‘;
              }
              $n = 1;
              while ($n <=8) {
              echo ‘<td>‘.$k * $n .‘</td>‘;
              $n++;
              }
              echo ‘</tr>‘;
              $k++;
              }while($k <= 5);

            ?>