From 99576c9ad38763b8f10e6b03a9cff1ce32604869 Mon Sep 17 00:00:00 2001
From: goat1000 <graham@goat1000.com>
Date: Tue, 25 Apr 2023 09:27:40 +0100
Subject: [PATCH] Fix compatibility with PHP 7.2.

---
 BestFitCurve.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/BestFitCurve.php b/BestFitCurve.php
index 17f8771..8e4005a 100644
--- a/BestFitCurve.php
+++ b/BestFitCurve.php
@@ -99,7 +99,11 @@ public function calculate(BoundingBox $area, $limit_start, $limit_end,
 
       // sort by error, best first
       uasort($errors, 'bccomp');
-      $best = array_key_first($errors);
+      $best = null;
+      foreach($errors as $k => $v) {
+        $best = $k;
+        break;
+      }
 
       $r = $results[$best];
       $c = $r->asArray();