按类别分开的帖子数组 - PHP

Question

我有一个如下所示的数组，它包含所有帖子，数组中的每个帖子都有一个“类别”。

我想 output 一个类别列表，然后是这些类别中包含的标题（下面是所需 output 的示例）

  [0]=>
  array(3) {
    ["title"]=>
    string(10) "Test Job 8"
    ["category"]=>
    string(5) "Cat 3"
    ["link"]=>
    string(46) "https://example.com/vacancies/test-job-8/"
  }
  [1]=>
  array(3) {
    ["title"]=>
    string(10) "Test Job 7"
    ["category"]=>
    string(5) "Cat 3"
    ["link"]=>
    string(46) "https://example.com/vacancies/test-job-7/"
  }
  [2]=>
  array(3) {
    ["title"]=>
    string(10) "Test Job 6"
    ["category"]=>
    string(5) "Cat 3"
    ["link"]=>
    string(46) "https://example.com/vacancies/test-job-6/"
  }
  [3]=>
  array(3) {
    ["title"]=>
    string(10) "Test Job 5"
    ["category"]=>
    string(5) "Cat 2"
    ["link"]=>
    string(46) "https://example.com/vacancies/test-job-5/"
  }
  [4]=>
  array(3) {
    ["title"]=>
    string(10) "Test Job 4"
    ["category"]=>
    string(5) "Cat 2"
    ["link"]=>
    string(46) "https://example.com/vacancies/test-job-4/"
  }
  [5]=>
  array(3) {
    ["title"]=>
    string(10) "Test Job 3"
    ["category"]=>
    string(5) "Cat 2"
    ["link"]=>
    string(46) "https://example.com/vacancies/test-job-3/"
  }
  [6]=>
  array(3) {
    ["title"]=>
    string(10) "Test Job 2"
    ["category"]=>
    string(5) "Cat 1"
    ["link"]=>
    string(46) "https://example.com/vacancies/test-job-2/"
  }
  [7]=>
  array(3) {
    ["title"]=>
    string(10) "Test Job 1"
    ["category"]=>
    string(5) "Cat 1"
    ["link"]=>
    string(46) "https://example.com/vacancies/test-job-1/"
  }
}

我想 output 所有类别，然后是其中包含的作业：

例如：

<h2>Cat 1:</h2>
<p>Test Job 1</p>
<p>Test Job 2</p>

<h2>Cat 2:</h2>
<p>Test Job 3</p>
<p>Test Job 4</p>
<p>Test Job 5</p>


<h2>Cat 3:</h2>
<p>Test Job 6</p>
<p>Test Job 7</p>
<p>Test Job 8</p>

任何有关实现此结果的最佳方法的帮助或建议将不胜感激！

Answer 1

首先您需要重新排列新数组中的数据，然后使用新数组生成 output

foreach ($data as $job) {
    $output[$job['category']] = $job['title'];
}

$prev_category = null;
$output = [];
foreach ($output as $category=>$job) {
    if($prev_category!==$category){
        echo "<h2>$category</h2>>";
        $prev_category=$category;
    }
    echo "<p>$job</p>";
}