如何在这种情况下基于php创建全局函数？

Question

我有一个if()代码会很长，其中一些共享一些常见的html代码。 我认为更好的方法是在if条件下调用每个html问题。 看我的代码，例如。 如果$fruit='apple' ，我想回显html代码问题1,3,5。 我应该如何使这些问题成为全局函数？

<?php
    if($fruit=='apple'){
     /*call question 1,3,5*/
    }else if($fruit=='banana'){
     /*call question 1,2,4*/
    }/*.........a lot of else if.....*/

   /*question
    1. <div>Is it good?</div>
       .............some multiple choice here
       <input type="text" value="submit"/>
    2. <div>where is it from?</div>
       .............some multiple choice here
       <input type="text" value="submit"/>
    3. <div>...........</div>
        .............some multiple choice here
       <input type="text" value="submit"/>
    4. <div>..........</div>
       .............some multiple choice here
       <input type="text" value="submit"/>
    */

?>

Answer 1

您可以这样编写代码：

$fruit = "apple";

if (in_array($fruit, ["apple", "banana"])) {
    echo '<div>Is it good?</div>
       .............some multiple choice here
       <input type="text" value="submit"/>';
}
if (in_array($fruit, ["banana", "pineapple"])) {
    echo '<div>where is it from?</div>
       .............some multiple choice here
       <input type="text" value="submit"/>';
}
// etc...

当然，还有其他方法可以做到这一点。 您可以构建一个数据结构，为您提供所需的所有信息，包括HTML，然后只需一个小循环即可输出所选的HTML：

$fruit = "apple";

$questions = array(
    "1" => array(
        "question" => "Is it good?",
        "answers" => ["Fantastic", "So-so", "Never again"]
    ),
    "2" => array(
        "question" => "Where is it from?",
        "answers" => ["South America", "Africa", "Australia"]
    ),
    "3" => array(
        "question" => "Which color does it have",
        "answers" => ["Yellow", "Red", "Orange"]
    ), //...etc
);
$questionsForFruits = array(
    "apple" => [1, 3],
    "banana" => [1, 2],
    "pineapple" => [2]
);

$fruit = "apple";

foreach($questionsForFruits[$fruit] as $questionNo) {
    $q = $questions[$questionNo];
    echo "<div>{$q['question']}</div>
          <select>";
    foreach($q['answers'] as $index =>$answer) {
        echo "<option value = '$index'>$answer</option>";
    }
    echo "</select><br>
          <input type='text' value='submit'/>";
}

Answer 2

将选项组织成一个数组

$questions = [
         'q1' => '<div>Is it good?</div>
                 .............some multiple choice here
                 <input type="text" value="submit"/>',
         'q2' => '<div>where is it from?</div>
                 .............some multiple choice here
                 <input type="text" value="submit"/>',
       ];

$fruit_questions = [
         'apple'  => [1,3,5],
         'banana' => [1,2,4],
         'guava' => [17,21,4],
       ];

然后，当您需要提问时，只需执行以下操作：

$question_keys = $fruit_questions[$fruit];

$html_of_questions = ''; // This will hold the questions to echo
foreach($question_keys as $question_key){
    $html_of_questions .= $questions['q'.$question_key]
}

echo $html_of_questions;