php - foreach 循环跳过 3 个项目中的前 2 个

Question

我想知道你们能否帮我弄清楚为什么这不能正确生成 HTML。变量 $wholeTeam 从 $wpdb->get_results(...) 返回，并确认其长度为 3(因为 echo count($wholeTeam) 吐出那个数字，我直接查看了 MySQL 数据库以确保有 3 行)。由于某种原因，只生成了 3 个中的最后一个；前两个不是。

    <h2>Current members <span class="title-count"> <?php echo count($wholeTeam) ?> </span></h2>
    <div class="row">
        <?php
        $sandwichTop = '<div class="col-xs-12 col-sm-6 col-md-4 col-lg-3"><img src="/assets/';
        $sandwichBottom = '/><button type="button" class="edit-mem-btn wp-core-ui button-primary">Edit</button></div>';
        foreach ($wholeTeam as $thisMember)
            $sandwichMiddle = $thisMember->picfn . '" id="memberid-' . $thisMember->id . '"';
            echo $sandwichTop . $sandwichMiddle . $sandwichBottom;
        ?>
    </div>  

生成为

<div class="row">
    <div class="col-xs-12 col-sm-6 col-md-4 col-lg-3">
          <img src="/assets/thepic.png" id="memberid-3"/>
          <button type="button" class="edit-mem-btn wp-core-ui button-primary">Edit</button></div>      
    </div>  
</div>

Answer 1

代码

foreach ($wholeTeam as $thisMember)
    $sandwichMiddle = $thisMember->picfn . '" id="memberid-' . $thisMember->id . '"';
    echo $sandwichTop . $sandwichMiddle . $sandwichBottom;

相当于:

foreach ($wholeTeam as $thisMember) {
    $sandwichMiddle = $thisMember->picfn . '" id="memberid-' . $thisMember->id . '"';
}
echo $sandwichTop . $sandwichMiddle . $sandwichBottom;

这就是为什么你只回显一次。如果你想回显每个 foreach 迭代:

foreach ($wholeTeam as $thisMember) {
    $sandwichMiddle = $thisMember->picfn . '" id="memberid-' . $thisMember->id . '"';
    echo $sandwichTop . $sandwichMiddle . $sandwichBottom;
}