按作者的名称对数组中的项进行聚类

Question

I have an Array like this:

[1] "John", "content1"
[2] "John", "content2"
[3] "John", "content3"
[4] "Jim", "content"
[5] "Joana", "content1"
[6] "Joana", "content2"

I attempted to have an output like this:

<ul>

 <li>John
  <ul>
   <li> content 1 </li>
   <li> content 2 </li>
   <li> content 3 </li>
  </ul>
 </li>

 <li>Jim
  <ul>
   <li> content </li>
  </ul>
 </li>

 <li>Joana
  <ul>
   <li> content 1 </li>
   <li> content 2 </li>
  </ul>
 </li>

</ul>

I tried solving it using a foreach-iteration, but it doesn't work out at all: (note: $cur_name means the author's name whereas $content means the content)

 foreach($array as $a) { 
              $cur_name = $a['name'];
    if ($old_name != $cur_name && $cur_name !="")$return .= "<li>";
    if ($old_name != $cur_name && $cur_name !="") {
        $return .= "<strong>$cur_name</strong><br />";
    }
    elseif($cur_name == "") {
    }
    elseif ($old_name == $cur_name) {
    }
    $return .= "$content<br />";
    if ($old_name != $cur_name && $cur_name !="") $return .= "</li>";

    $old_name = $cur_name;

    }
}

Any ideas highliy appreciated..

Answer 1

Use this code:

Do something like this:

• iterate your array and create another key-ed array (say $processedArray) where key value taken from 1st index on each array
• on each iteration, add 2st index to it's appropriate 1st key.
• after that, iterate this $processedArray to output it appropriately.

I know reading code would be easier, so, try this one:

<?php
$data = array(
    array('name'=>'John', 'content'=>'Content1'),
    array('name'=>'John', 'content'=>'Content2'),
    array('name'=>'John', 'content'=>'Content3'),
    array('name'=>'Jim', 'content'=>'Content'),
    array('name'=>'Joana', 'content'=>'Content1'),
    array('name'=>'Joana', 'content'=>'Content2'),
);

$processedArray = array();

foreach( $data as $each )
{
    if( !isset( $processedArray[ $each[ 'name' ] ] ))
        $processedArray[ $each[ 'name' ] ] = array();
    $processedArray[ $each[ 'name' ] ][] = $each[ 'content' ];
}

echo "<ul>
";

foreach( $processedArray as $key => $arrVal)
{
    echo "  <li>$key
";
    echo "    <ul>
";
    foreach( $arrVal as $value )
    {
        echo "      <li>$value</li>
";
    }
    echo "    </ul>
";
    echo "  </li>
";
}
echo "</ul>
";
?>