Multidimensional array values with RecursiveArrayIterator for select option groups - php

Question

I have this new multidimensional array and I'm trying to make multiple drop-down selects with option groups. So that each select contains options with "$value[ 'proj_id' ] $value[ 'projName' ]. Selects are grouped by ID (the first select: 127, second select: 131, third select: 130 etc.) Options are grouped by clients names, first opt.group Another client, with one option. Second opt. group Nice with two options etc. Before I was using RecursiveArrayIterator() now with third dimension it no longer works:
$iterator = new RecursiveArrayIterator( $project_data_group );
$dropdown = '';
// get all children for dropdown
while ( $iterator->valid() ) {
if ( $iterator->hasChildren() ) {
foreach ( $iterator->getChildren() as $key1 => $value ) {
$dropdown .= "<option data-proj_id=" . $value[ 'proj_id' ] . " value=" . $value[ 'projName' ] . ">" . $value[ 'projName' ] . "</option>";
}
}
break;
}
array (
127 =>
array (
'Another client' =>
array (
0 =>
array (
'dateTime' => '2020-06-04 09:33:00',
'id' => '127',
'cID' => '50',
'client' => 'Another client',
'proj_id' => '103',
'projName' => 'Logo new',
'is_from_main_table' => '1',
),
),
'Nice' =>
array (
0 =>
array (
'dateTime' => '2020-06-04 09:33:00',
'id' => '127',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '106',
'projName' => 'Advert',
'is_from_main_table' => '0',
),
1 =>
array (
'dateTime' => '2020-06-04 09:33:00',
'id' => '127',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '102',
'projName' => 'Webpage',
'is_from_main_table' => '0',
),
),
'Mikrosoft' =>
array (
0 =>
array (
'dateTime' => '2020-06-04 09:33:00',
'id' => '127',
'cID' => '51',
'client' => 'Mikrosoft',
'proj_id' => '104',
'projName' => 'Poster',
'is_from_main_table' => '0',
),
),
'Gooble' =>
array (
0 =>
array (
'dateTime' => '2020-06-04 09:33:00',
'id' => '127',
'cID' => '48',
'client' => 'Gooble',
'proj_id' => '105',
'projName' => 'Poster another',
'is_from_main_table' => '0',
),
),
),
131 =>
array (
'Nice' =>
array (
0 =>
array (
'dateTime' => '2020-06-08 17:23:00',
'id' => '131',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '102',
'projName' => 'Webpage',
'is_from_main_table' => '1',
),
1 =>
array (
'dateTime' => '2020-06-08 17:23:00',
'id' => '131',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '106',
'projName' => 'Advert',
'is_from_main_table' => '0',
),
),
'Another client' =>
array (
0 =>
array (
'dateTime' => '2020-06-08 17:23:00',
'id' => '131',
'cID' => '50',
'client' => 'Another client',
'proj_id' => '103',
'projName' => 'Logo new',
'is_from_main_table' => '0',
),
),
'Mikrosoft' =>
array (
0 =>
array (
'dateTime' => '2020-06-08 17:23:00',
'id' => '131',
'cID' => '51',
'client' => 'Mikrosoft',
'proj_id' => '104',
'projName' => 'Poster',
'is_from_main_table' => '0',
),
),
'Gooble' =>
array (
0 =>
array (
'dateTime' => '2020-06-08 17:23:00',
'id' => '131',
'cID' => '48',
'client' => 'Gooble',
'proj_id' => '105',
'projName' => 'Poster another',
'is_from_main_table' => '0',
),
),
),
130 =>
array (
'Gooble' =>
array (
0 =>
array (
'dateTime' => '2020-06-09 17:30:00',
'id' => '130',
'cID' => '48',
'client' => 'Gooble',
'proj_id' => '105',
'projName' => 'Poster another',
'is_from_main_table' => '1',
),
),
'Nice' =>
array (
0 =>
array (
'dateTime' => '2020-06-09 17:30:00',
'id' => '130',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '106',
'projName' => 'Advert',
'is_from_main_table' => '0',
),
1 =>
array (
'dateTime' => '2020-06-09 17:30:00',
'id' => '130',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '102',
'projName' => 'Webpage',
'is_from_main_table' => '0',
),
),
'Another client' =>
array (
0 =>
array (
'dateTime' => '2020-06-09 17:30:00',
'id' => '130',
'cID' => '50',
'client' => 'Another client',
'proj_id' => '103',
'projName' => 'Logo new',
'is_from_main_table' => '0',
),
),
'Mikrosoft' =>
array (
0 =>
array (
'dateTime' => '2020-06-09 17:30:00',
'id' => '130',
'cID' => '51',
'client' => 'Mikrosoft',
'proj_id' => '104',
'projName' => 'Poster',
'is_from_main_table' => '0',
),
),
),
133 =>
array (
'Nice' =>
array (
0 =>
array (
'dateTime' => '2020-06-11 19:58:00',
'id' => '133',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '106',
'projName' => 'Advert',
'is_from_main_table' => '1',
),
1 =>
array (
'dateTime' => '2020-06-11 19:58:00',
'id' => '133',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '102',
'projName' => 'Webpage',
'is_from_main_table' => '0',
),
),
'Another client' =>
array (
0 =>
array (
'dateTime' => '2020-06-11 19:58:00',
'id' => '133',
'cID' => '50',
'client' => 'Another client',
'proj_id' => '103',
'projName' => 'Logo new',
'is_from_main_table' => '0',
),
),
'Mikrosoft' =>
array (
0 =>
array (
'dateTime' => '2020-06-11 19:58:00',
'id' => '133',
'cID' => '51',
'client' => 'Mikrosoft',
'proj_id' => '104',
'projName' => 'Poster',
'is_from_main_table' => '0',
),
),
'Gooble' =>
array (
0 =>
array (
'dateTime' => '2020-06-11 19:58:00',
'id' => '133',
'cID' => '48',
'client' => 'Gooble',
'proj_id' => '105',
'projName' => 'Poster another',
'is_from_main_table' => '0',
),
),
),
134 =>
array (
'Mikrosoft' =>
array (
0 =>
array (
'dateTime' => '2020-06-22 13:36:00',
'id' => '134',
'cID' => '51',
'client' => 'Mikrosoft',
'proj_id' => '104',
'projName' => 'Poster',
'is_from_main_table' => '1',
),
),
'Nice' =>
array (
0 =>
array (
'dateTime' => '2020-06-22 13:36:00',
'id' => '134',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '106',
'projName' => 'Advert',
'is_from_main_table' => '0',
),
1 =>
array (
'dateTime' => '2020-06-22 13:36:00',
'id' => '134',
'cID' => '47',
'client' => 'Nice',
'proj_id' => '102',
'projName' => 'Webpage',
'is_from_main_table' => '0',
),
),
'Another client' =>
array (
0 =>
array (
'dateTime' => '2020-06-22 13:36:00',
'id' => '134',
'cID' => '50',
'client' => 'Another client',
'proj_id' => '103',
'projName' => 'Logo new',
'is_from_main_table' => '0',
),
),
'Gooble' =>
array (
0 =>
array (
'dateTime' => '2020-06-22 13:36:00',
'id' => '134',
'cID' => '48',
'client' => 'Gooble',
'proj_id' => '105',
'projName' => 'Poster another',
'is_from_main_table' => '0',
),
),
),
)

Answer 1

I haven't tested this, but based on the grouping you want, this approach might work.
function getGroupedDropdownOptions($array) {
$options = [];
foreach ( $array as $groups ) {
foreach ( $groups as $clientName => $group ) {
// You should be able to use $clientName or $group['client'] here
$options[$group['client']][] = ["proj_name" => $group['projName'], "proj_id" => $group['proj_id'];
}
break;
}
return $options;
}
Build the HTML like this after setting $dropdownOptions with getGroupedDropdownOptions().
<select>
<?php foreach($dropdownOptions as $groupName => $group): ?>
<optgroup label="<?php echo $groupName; ?>">
<?php foreach($group as $option): ?>
<option data-proj_id="<?php echo $option['proj_id']; ?>" value="<?php echo $option['proj_name']; ?>"> <?php echo $option['proj_name']; ?></option>
<?php endforeach; ?>
</optgroup>
<?php endforeach; ?>
</select>