从Chunked Array返回唯一值

Question

I have a calendar script that outputs to a text file. I'm opening the text file, reading it into an array and then outputting the results. The text file contains:

7/9/2013-7/13/2013
Hot Stuff
By Robert More. Yes, folks, it's all platform shoes, leisure suits..
hotstuff.jpg
1,1,0,
*-*
7/16/2013-7/20/2013
Hot Stuff
By Robert More. Yes, folks, it's all platform shoes, leisure suits.. 
hotstuff.jpg
1,1,0,
*-*

My PHP code looks like this:

$content = file('DC_PictureCalendar/admin/database/cal2data.txt');
$content_chunked = array_chunk($content, 6);
            if (count($content_chunked > 0))
            {
                echo "<table>";
                for ($i=0;$i<count($content_chunked);$i++)
                {
                    echo "<tr>";
                    echo "<td valign='top'>";
                    echo "<div style='padding-top:6px;'>";
                    echo "<a href='schedule.php'>";
                    echo "<img src='DC_PictureCalendar/admin/database/images/".$content_chunked[$i][3]."' width='80' height='80' border='2'>";
                    echo "</a>";
                    echo "</div>";
                    echo "</td>";
                    echo "<td valign='top'>";
                    echo "<div style='padding-left:5px;'>";
                    echo "<table>";
                    echo "<tr>";
                    echo "<td>";
                    echo "<h2>";
                    echo "<a href='schedule.php'>";
                    echo $content_chunked[$i][1];
                    echo "</a>";
                    echo "</h2>";
                    echo "</td>";
                    echo "</tr>";
                    echo "<tr>";
                    echo "<td>";
                    echo $content_chunked[$i][2];
                    echo "<a class='green' href='schedule.php'>";
                    echo "Read more..";
                    echo "</a>";
                    echo "</td>";
                    echo "</tr>";
                    echo "</table>";
                    echo "</div>";
                    echo "</td>";
                    echo "</tr>";
                }
                echo "</table>";
            }

Problem is, if there is a duplicate entry in the $content_chunked[$i][1] (which is the title in this case), I just want to display it once instead of twice. Is this possible? I thought array_unique might work but it didn't seem to help. Thanks in advance!

Answer 1

array_unique() RETURNS the array without duplicates, but does NOT modify the original array!

so:

$a = [1, 1, 2, 3]
array_unique($a) => [1, 2, 3]
$a => [1, 1, 2, 3]

The new array needs to be saved in a variable for you to access it later.

$a = [1, 1, 2, 3]
$b = array_unique($a)
$b => [1, 2, 3]