How to rowspan a td if it has a duplicate value - php

Question

I am trying to manipulate my table using rowspan but I'm kinda struggling.
My expected output should be if there's two duplicated names I want it to have a rowspan in the table. But my problem occurs if there's a third duplicate and its separated between another name (in this case 'ruby' is in between) my table will have an excess column.
My code is kinda like this
sample:
$gems = array(
0 => array:2[
name: Amber
value: 20
]
1 => array:2[
name: Amber
value: 30
]
2 => array:2[
name: Ruby
value: 40
]
3 => array:2[
name: Amber
value: 50
]
4 => array:2[
name: Emerald
value: 60
]
);
This is how I map the rowspan
$rows = array();
foreach($rows as $key => $gem){
$rows[$key] = $gem['name'];
}
$arr = array_replace($row,array_fill_keys(array_keys($row, null),''));
$rowspan = array_count_values($ar);
$rowspan output will be this which i use on the table.
array:3(
"Amber" => 3
"Ruby" => 1
"Emerald" => 1
)
Then my display is kinda like this (not exact). Im injecting the rowpan on $rowspanDuplicated
$html = '<table>'
foreach($gems as $key => $gem){
$html .= '<tr>'
$rowspanDuplicated = 'rowspan="'. $rowspan[$gem['name']].'"';
if($rowspan[$gem['name']] <= 1){
$rowcount = 1;
$html .= '<td>' . $this->n($sv['name']). ' </td>'
} else {
if($rowcount<=1){
$html .= '<td' . $rowspanDuplicated . '>' .$this->n($sv['name']) . '</td>';
}
if($rowspan[$sv['name']] == $rowcount){
$rowcount=1;
} else {
$rowcount++;
}
}
$html .= '<td>' . $this->n($sv['value']). ' </td>'
$html .= '</tr>'
}
$html = '</table>'
The problem to this code is that $gem[3] will also have a rowspan
I want my table something like this.
_________________
Amber | 20
|-----
| 30
________|________
Ruby | 40
_________________
Amber | 50
________|________
Emerald | 60
_________________

Answer 1

I think you should group your array based on name in the first place.
public function group($gems)
{
$grouppedGems = [];
foreach($gems as $gem) {
if (!array_key_exists($gem['name'], $grouppedGems))
$grouppedGems[$gem['name']] = [];
$grouppedGems[$gem['name']][] = $gem;
}
return $grouppedGems;
}
$html = '<table>'
foreach($gems as $name => $gem){
$html .= '<tr><td rowspan="' . count($gem) . '">' . $name . '</td><td>';
foreach($gem as $item) {
$html .="<tr><td>{$this->n($item['value'])}</td></tr>";
}
$html .= '</td></tr>';
}
$html = '</table>';
I didn't test the html string, but I think it will work. BTW, you won't need rowspan, bu I added it just in case.

Answer 2

blade version
#foreach($gems as $gem)
<tr>
<td
#if(!$loop->last && $gems[$loop->index+1]->gem['name'] == $gem['name']) rowspan=2 >{{$gem['name']}}</td>
<td>{{$gem['value']</td>
<tr>
#endforeach