// pick up the trial if we have selected a specific one
if (!isset($_GET['trial'])) {
    $trial = 1;
}
if (isset($_GET['trial'])) {
    $trial = $_GET['trial'];
}
// pick up the participant if we have selected a specific one
if (!isset($_GET['participant'])) {
    $participant = $participant_list[0];
}
if (isset($_GET['participant'])) {
    $participant = $_GET['participant'];
}
// work out the trial list
$trial_list = single_column_array_builder_groupby($current_project . "." . $participant . "_aggregated", "trial_index");
sort($trial_list, SORT_NUMERIC);
// pick up the analyses if we have selected a specific one
if (!isset($_GET['analyses'])) {
    $analyses = $analyses_list[0];
}
if (isset($_GET['analyses'])) {
    $analyses = $_GET['analyses'];
}
// sort out the column list
parse_str(urldecode($_SERVER['QUERY_STRING']), $data);
$selected_column_list = $data['column_list'];
$default_column_list = array('trial', 'CURRENT_FIX_INDEX', 'CURRENT_fIX_DURATION', 'value', 'response', 'rt', 'outcome');
if (is_array($selected_column_list)) {
    $column_list = array_merge($selected_column_list, $default_column_list);
}
<?php

include "../conf/conf.php";
include "../functions/table_builder.php";
include "../functions/single_column_array_builder.php";
include "../functions/header_array_builder.php";
include "../functions/option_list_builder.php";
include "../functions/trial_display.php";
if ($_GET['refresh'] == 'histogram_form') {
    // get the ppts and lsit them
    $participant_list = single_column_array_builder_groupby("" . $current_project . ".analyses_output", "ppt_id");
    array_unshift($participant_list, 'all');
    // set runner list
    $runner_list = single_column_array_builder_groupby("" . $current_project . ".analyses_output", "runner");
    // options for number of bins
    $bin_list = array();
    for ($i = 1; $i < 51; $i++) {
        $bin_list[] = $i;
    }
    // Start building the form now
    echo "<article id='participant_list_form' name='histogram_selection_form'>";
    echo "<form>";
    echo "Note: This section is a work in progress.<br>";
    echo "Select Runner:";
    option_list_builder('selected_runner', $runner_list, '', '');
    echo "<br>";
    echo "Select Participant:";
    option_list_builder('selected_participant', $participant_list, '', '');
    echo "<br>";
    echo "Number of Bins:";
    option_list_builder('selected_bincount', $bin_list, '', '20');