Gravity Forms - Redirection Based on Answers

snippet.php

<?php
/*
Usage: You have a questionare. You set the value of each answer in relation to the index+1 in the array below 
We then correspond each answer to see which result was selected the most then redirect to that page
For a tie we just redirect to the top item, this could be customised to select one of the top results
*/

add_filter( 'gform_confirmation', 'custom_confirmation', 10, 4 );
function custom_confirmation( $confirmation, $form, $lead, $ajax ){
    if( 1 == $form['id'] ) {
    	$results = [
	    	    [
		    	'count' => 0,
		    	'redirect' => home_url().'/example-1/'
		    ],
		    [
		    	'count' => 0,
		    	'redirect' => home_url().'/example-2/'
		    ]
	    ];

	    foreach( $lead as $k => $v ) {
		    if( is_numeric( $k ) ) {
			    $results[ $v - 1 ]['count'] =  $results[ $v - 1 ]['count'] + 1;
			}
		}

		$tie 		= false;
		$most 		= 0;
		$redirect 	= 0;

		foreach( $results as $k => $r ) {
			if ($r['count'] > $most ) {
				$most 		= $r['count'];
				$tie 		= false;
				$redirect 	= $k;
			} elseif ($r['count'] ==$most ) {
				$tie = true;
			}
		}

		if( false == $tie ) {
			$confirmation = [ 'redirect' => $results[$redirect]['redirect'] ];
		} else {
			$confirmation = [ 'redirect' => $results[0]['redirect'] ];
		}
    }

    return $confirmation;
}