Some micro-optimizations

2 files changed, 4 insertions, 4 deletions

diff --git a/system/core/Input.php b/system/core/Input.php
index adc5f7ac0..4d73fa424 100644
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -768,9 +768,9 @@ class CI_Input {
 
 			foreach ($_SERVER as $key => $val)
 			{
-				if (strpos($key, 'HTTP_') === 0)
+				if (sscanf($key, 'HTTP_%s', $header) === 1)
 				{
-					$headers[substr($key, 5)] = $this->_fetch_from_array($_SERVER, $key, $xss_clean);
+					$headers[$header] = $this->_fetch_from_array($_SERVER, $key, $xss_clean);
 				}
 			}
 		}
diff --git a/system/core/Output.php b/system/core/Output.php
index 9300df356..6312ccd86 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -256,9 +256,9 @@ class CI_Output {
 	{
 		for ($i = 0, $c = count($this->headers); $i < $c; $i++)
 		{
-			if (preg_match('/^Content-Type:\s(.+)$/', $this->headers[$i][0], $matches))
+			if (sscanf($this->headers[$i][0], 'Content-Type: %s', $content_type) === 1)
 			{
-				return $matches[1];
+				return $content_type;
 			}
 		}