打破循环并获得计数

Question

我无法打破while循环。

<?php $quizsections = mysql_query("SELECT * FROM quiz_sections");
while($quizsectionsrslt = mysql_fetch_array($quizsections)){
    $quizsectionsid        = $quizsectionsrslt['id'];
    $quizsectionsheading   = $quizsectionsrslt['heading'];
    $quizsectionsquizid    = $quizsectionsrslt['quizid'];
    $quizsectionsfirstslot = $quizsectionsrslt['firstslot'];
    echo $quizsectionsheading."<br />";

    $quizslots = mysql_query("SELECT * FROM quiz_slots WHERE `quizid`=$quizsectionsquizid");
    while($quizslotsrslt = mysql_fetch_array($quizslots)){
        $quizslotids = $quizslotsrslt['questionid'];
        $questions = mysql_query("SELECT * FROM question WHERE `id`=$quizslotids");

        while($questionsrslt = mysql_fetch_array($questions)){
            echo $questiontext = $questionsrslt['id']."<br />";
        }
    }
}?>

显示输出

Aptitude

  

1 2 3 .... 40

Arithmetic

  

1 2 3 ... 40

Reasoning

  

1 2 3 ... 40

Computers

  

1 2 3 ... 40

但我想要的输出

Aptitude

  

1 2 3 ... 10

Arithmetic

  

11 12 13 ... 25

Reasoning

  

26 27 28 ... 30

Computers

  

31 32 33 ... 40

表格结构

Answer 1

您将需要在MySQL查询上使用LIMIT来根据第一个插槽更改输出

<?php $quizsections = mysql_query("SELECT * FROM quiz_sections");
while($quizsectionsrslt = mysql_fetch_array($quizsections)){
    $quizsectionsid        = $quizsectionsrslt['id'];
    $quizsectionsheading   = $quizsectionsrslt['heading'];
    $quizsectionsquizid    = $quizsectionsrslt['quizid'];
    $quizsectionsfirstslot = $quizsectionsrslt['firstslot'];
    echo $quizsectionsheading."<br />";

    $quizslots = mysql_query("SELECT * FROM quiz_slots WHERE `quizid`=$quizsectionsquizid LIMIT ".($quizsectionsfirstslot-1).", 10");
    while($quizslotsrslt = mysql_fetch_array($quizslots)){
        $quizslotids = $quizslotsrslt['questionid'];
        $questions = mysql_query("SELECT * FROM question WHERE `id`=$quizslotids");

        while($questionsrslt = mysql_fetch_array($questions)){
            echo $questiontext = $questionsrslt['id']."<br />";
        }
    }
}?>

Answer 2

您可以通过添加以下内容来停止执行循环：

break;

在您要停止的行