From 44c170459e6e4cc1f4439f14d31142a3e13d9f66 Mon Sep 17 00:00:00 2001
From: Ryan Boren <ryan@git.wordpress.org>
Date: Mon, 20 Oct 2008 19:25:02 +0000
Subject: [PATCH] Reduce backtracking in wpautop. fixes #6877

git-svn-id: https://develop.svn.wordpress.org/trunk@9255 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/formatting.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index 71dfc84071..5192d95b95 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -126,7 +126,11 @@ function wpautop($pee, $br = 1) {
 		$pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee);
 	}
 	$pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates
-	$pee = preg_replace('/\n?(.+?)(?:\n\s*\n|\z)/s', "<p>$1</p>\n", $pee); // make paragraphs, including one at the end
+	// make paragraphs, including one at the end
+	$pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);
+	$pee = '';
+	foreach ( $pees as $tinkle )
+		$pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";
 	$pee = preg_replace('|<p>\s*?</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace
 	$pee = preg_replace('!<p>([^<]+)\s*?(</(?:div|address|form)[^>]*>)!', "<p>$1</p>$2", $pee);
 	$pee = preg_replace( '|<p>|', "$1<p>", $pee );