From 6c0002048504e43b399abece0668afa2b5c87a07 Mon Sep 17 00:00:00 2001
From: Patrick Brown <ptbrown@whoopdedo.org>
Date: Fri, 8 May 2015 17:11:44 -0400
Subject: Limit number of lines to replace.

---
 inc/io.php | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'inc/io.php')

diff --git a/inc/io.php b/inc/io.php
index 11a3fa77f..dbb42114b 100644
--- a/inc/io.php
+++ b/inc/io.php
@@ -313,10 +313,16 @@ function io_replaceInFile($file, $oldline, $newline, $regex=false, $maxlines=0)
 
     // remove all matching lines
     if ($regex) {
-        if($maxlines == 0) {
-            $lines = preg_grep($oldline, $lines, PREG_GREP_INVERT);
+        if($maxlines > 0) {
+            $matches = preg_grep($oldline, $lines);
+            $count = 0;
+            foreach($matches as $ix=>$m) {
+                $lines[$ix] = preg_replace($oldline, $newline, $m);
+                if(++$count >= $maxlines) break;
+            }
         } else {
-            $lines = preg_replace($oldline, $newline, $lines, $maxlines);
+            $lines = ($maxlines == 0) ? preg_grep($oldline, $lines, PREG_GREP_INVERT)
+                                      : preg_replace($oldline, $newline, $lines, $maxlines);
         }
     } else {
         $count = 0;
-- 
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