From 1501ccd07868d626a51802d14ed41ed05a3532ad Mon Sep 17 00:00:00 2001
From: Mark Newnham <mark@newnhams.com>
Date: Wed, 1 Nov 2023 06:59:28 -0600
Subject: Prevent str_replace NULL test error in PHP 8.1 (#1005)

---
 drivers/adodb-oci8.inc.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/adodb-oci8.inc.php b/drivers/adodb-oci8.inc.php
index 2506d68f..542b6945 100644
--- a/drivers/adodb-oci8.inc.php
+++ b/drivers/adodb-oci8.inc.php
@@ -1579,6 +1579,9 @@ SELECT /*+ RULE */ distinct b.column_name
 		if ($this->noNullStrings && strlen($s) == 0) {
 			$s = ' ';
 		}
+		else if (strlen($s) == 0) {
+			return "''";
+		}
 		if ($this->replaceQuote[0] == '\\'){
 			$s = str_replace('\\','\\\\',$s);
 		}
-- 
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