Remove dependency to exif extension (#6624)

* Remove dependency to exit extension
fix https://github.com/FreshRSS/FreshRSS/issues/6573

* Fix return

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/favicons.php b/lib/favicons.php
index a9ebf9f30..3795dc43e 100644
--- a/lib/favicons.php
+++ b/lib/favicons.php
@@ -132,3 +132,16 @@ function download_favicon(string $url, string $dest): bool {
 	return ($favicon != '' && file_put_contents($dest, $favicon) > 0) ||
 		@copy(DEFAULT_FAVICON, $dest);
 }
+
+function contentType(string $ico): string {
+	$ico_content_type = 'image/x-icon';
+	if (function_exists('mime_content_type')) {
+		$ico_content_type = mime_content_type($ico) ?: $ico_content_type;
+	}
+	switch ($ico_content_type) {
+		case 'image/svg':
+			$ico_content_type = 'image/svg+xml';
+			break;
+	}
+	return $ico_content_type;
+}