使用 while 循环回显 PHP 数组答案

【问题标题】：echo PHP array with while loop使用 while 循环回显 PHP 数组
【发布时间】：2017-01-30 22:37:57
【问题描述】：

我正在使用 while 循环来回显 PHP 数组：

$connect = mysqli_connect("localhost", "user", "password", "db");
$sql = "SELECT * FROM table ORDER BY RAND() LIMIT 0,4";
$result = mysqli_query($connect, $sql);

if(mysqli_num_rows($result) > 0)
{
 echo'<section>
        <div class="container">
           <div class="row">
             <h2 class="bold">title</h2>
               <hr> ';

                while($row = mysqli_fetch_array($result))
                {
                 echo'
                <div class="col-sm-3 col-md-3 col-md-push-3">
                    <div class="portfolio-wrapper">   
                        <div class="portfolio-single">
                            <div class="portfolio-thumb">
                                <a href="'.$row['link']." target="_blank">                                                        <img src="'.$row['image'].'" class="img-responsive" alt="'.$row['alt']."></a>
                            </div>
                        </div>
                        <div class="portfolio-info" dir="rtl">
                            <a href="'.$row['link2']." target="_self"><h2>                     </h2>
                                <h6>'.$row['title'].</h6>
                            </a>
                        </div>
                    </div>
                </div>';

            }
                echo'
                </div>
                    </div>
                    </section';
            }   

            ?>

这段代码对我来说很好，但问题是我需要回显 4 个不同的

例如：

   first will be: <div class="col-sm-3 col-md-3 col-md-push-9">
   second: <div class="col-sm-3 col-md-3 col-md-push-3">
   third: <div class="col-sm-3 col-md-3 col-md-pull-3">
   last: <div class="col-sm-3 col-md-3 col-md-pull-9">

任何想法如何使用 while 循环来完成这个结构？

【问题讨论】：

保留一个计数器变量，使用它来确定使用哪个类，然后为循环的下一次迭代增加计数器变量。
就像罗比说的。像 $array = array( '0' => 'col-sm-3 col-md-3 col-md-push-9' '1' => 'col-sm-3 col-md-3 col-md-push-3', '2' => 'col-sm-3 col-md-3 col-md-pull-3', '3' => 'col-sm-3 col-md-3 col-md-pull-9'); $count = 0; while(){ div... class=$array[$count]; ... count ++ } 这样的东西在记事本中完成，所以语法不正确，但你明白了

标签： php mysql arrays while-loop

【解决方案1】：

<?php
$connect = mysqli_connect("localhost", "user", "password", "db");
$sql = "SELECT * FROM table ORDER BY RAND() LIMIT 0,4";
$result = mysqli_query($connect, $sql);
$i = 1;
$count = count($result);
if(mysqli_num_rows($result) > 0)
{
 echo'<section>
        <div class="container">
           <div class="row">
             <h2 class="bold">title</h2>
               <hr> ';

                while($row = mysqli_fetch_array($result))
                {
                if($i==1){echo '<div class="col-sm-3 col-md-3 col-md-push-9">';}
                elseif($i == $count){echo '<div class="col-sm-3 col-md-3 col-md-pull-9">';}
                elseif($i%2 == 0){echo '<div class="col-sm-3 col-md-3 col-md-push-3">';}
                elseif($i%3 == 0){echo '<div class="col-sm-3 col-md-3 col-md-pull-9">';}

                 echo'
                        <div class="portfolio-wrapper">   
                            <div class="portfolio-single">
                                <div class="portfolio-thumb">
                                    <a href="'.$row['link']." target="_blank">                                                        <img src="'.$row['image'].'" class="img-responsive" alt="'.$row['alt']."></a>
                                </div>
                            </div>
                            <div class="portfolio-info" dir="rtl">
                                <a href="'.$row['link2']." target="_self"><h2>                     </h2>
                                    <h6>'.$row['title'].</h6>
                                </a>
                            </div>
                        </div>
                    </div>';
                    $i =$i+1;
            }
                echo'
                </div>
                    </div>
                    </section';
            }   

?>

【讨论】：

【解决方案2】：

使用计数器，并将您的类放入这样的数组中：

$classes = [
    "col-sm-3 col-md-3 col-md-push-9",
    "col-sm-3 col-md-3 col-md-push-3",
    "col-sm-3 col-md-3 col-md-pull-3",
    "col-sm-3 col-md-3 col-md-pull-9"
];

$i = 0;
while($row = mysqli_fetch_array($result)) {
    if ($i > 3) {
        $i = 0;
    }
    ?>
    <div class="<?php echo $classes[$i]; ?>">
        Your content comes here
    </div>
    <?php
    $i++;
}

注意

如果数组中没有类似的索引，则重置计数器。您的脚本假定您将始终获得 4 行。

【讨论】：