Foreach loop "Group By" Key in PHP Array - php

Question

I am so close to figuring this out, this is using Wordpress and Gravity Forms Plugin:
<?php
$form_id = '1'; // The registration form's ID
$entries = GFAPI::get_entries( $form_id ); // Get all entries
$html = "<table class='ent'>"; // Create an HTML table
$html .= "<tr><th>Name</th><th>Organization</th><th>Event</th><th>Date</th><th>Number Attending</th></tr>";
$list = array(); // Array to store the original fields
$used = array(); // Array to stored the "used" fields
// Loop through array of entries,each element
foreach($entries as $entry){
// Get datepart from datetime of event and today's date
$date = date_format(new DateTime($entry['8']), 'Y-m-d');
$today = date("Y-m-d");
// Compare event's date with current date
if ( $date >= $today ) {
$list[] = $entry;
if (!empty($used[$entry['6']])) // If used[event name] not null then sum associated numattend
{
$used[$entry['6']] += $entry['5'];
}
else // return associated numattend
{
$used[$entry['6']] = $entry['5'];
}
}
}
unset($entry);
foreach ($used as $key => $value) {
foreach ($list as $key1 => $value1) {
$html .= "<tr><td>" . $value1['1'] . " " . $value1['2'] . "</td><td>" . $value1['93'] . "</td><td>" . $value1['6'] . "</td><td>" . $value1['8'] . "</td><td>" . $value1['5'] . "</td></tr>";
}
$html .= "<tr class='ent_sum_rw'><td>" . " " . "</td><td>" . " " . "</td><td>" . " " . "</td><td class='ent_sum'>" . "Total Attending:" . "</td><td>" . $value . "</td></tr>";
}
unset($value);
$html .= "</table>";
return $html;
?>
Result:
I want the loop to end the entry list on the corresponding "Event Name", Like "Test Event 22" should not show up on the top entry list.

Answer 1

The trick is to populate an Array that meets your demands and after that convert it to html. I haven't tested the code, but it should be clear how it works.
$aEventList = Array();
foreach($entries as $entry){
if (!isset($aEventList[$entry['7']])){ //7 is id of event
//if this event is not made, create it and add name and the date, enter the right numeral
$aEventList[$entry['7']]['name'] = $entry['6'];
$aEventList[$entry['7']]['date'] = $entry['90'];
$aEventList[$entry['7']]['users'] = Array();
}
$aEventList[$entry['7']]['users'][] = Array('name' => $entry['1'] . ' '. $entry['2'],
'org' => $entry['93'],
'num' => $entry['5']);
}
//now you've populated every event and you can loop through it on your desired way:
foreach ($aEventList as $iEvent => $aEvent){
echo $aEvent['name']; //event name
echo $aEvent['date']; // event date
foreach ($aEvent['users'] as $aEventUser){
echo $aEventUser['name']; // user name
echo $aEventUser['org']; // user organisation
echo $aEventUser['num']; // num attendees
}
}