diff --git a/includes/admin/importers/class-wc-tax-rate-importer.php b/includes/admin/importers/class-wc-tax-rate-importer.php
index 6fac7b2cd66..4e24bfaabd0 100644
--- a/includes/admin/importers/class-wc-tax-rate-importer.php
+++ b/includes/admin/importers/class-wc-tax-rate-importer.php
@@ -75,7 +75,9 @@ class WC_Tax_Rate_Importer extends WP_Importer {
 		if ( function_exists( 'gc_enable' ) ) {
 			gc_enable();
 		}
-		@set_time_limit(0);
+		if ( function_exists( 'set_time_limit' ) && false === strpos( ini_get( 'disable_functions' ), 'set_time_limit' ) && ! ini_get( 'safe_mode' ) ) {
+			set_time_limit( 0 );
+		}
 		@ob_flush();
 		@flush();
 		@ini_set( 'auto_detect_line_endings', '1' );
diff --git a/includes/class-wc-ajax.php b/includes/class-wc-ajax.php
index cacfdcc3e3c..8012d5565dd 100644
--- a/includes/class-wc-ajax.php
+++ b/includes/class-wc-ajax.php
@@ -844,7 +844,9 @@ class WC_AJAX {
 			die(-1);
 		}
 
-		@set_time_limit(0);
+		if ( function_exists( 'set_time_limit' ) && false === strpos( ini_get( 'disable_functions' ), 'set_time_limit' ) && ! ini_get( 'safe_mode' ) ) {
+			set_time_limit( 0 );
+		}
 
 		$post_id = intval( $_POST['post_id'] );
 
diff --git a/includes/class-wc-download-handler.php b/includes/class-wc-download-handler.php
index f2f5a7484ac..4171d5b1f7f 100644
--- a/includes/class-wc-download-handler.php
+++ b/includes/class-wc-download-handler.php
@@ -338,11 +338,11 @@ class WC_Download_Handler {
 	 * Check and set certain server config variables to ensure downloads work as intended.
 	 */
 	private static function check_server_config() {
-		if ( ! ini_get('safe_mode') ) {
-			@set_time_limit(0);
+		if ( function_exists( 'set_time_limit' ) && false === strpos( ini_get( 'disable_functions' ), 'set_time_limit' ) && ! ini_get( 'safe_mode' ) ) {
+			set_time_limit( 0 );
 		}
-		if ( function_exists( 'get_magic_quotes_runtime' ) && get_magic_quotes_runtime() ) {
-			@set_magic_quotes_runtime(0);
+		if ( function_exists( 'get_magic_quotes_runtime' ) && get_magic_quotes_runtime() && version_compare( phpversion(), '5.4', '<' ) ) {
+			set_magic_quotes_runtime( 0 );
 		}
 		if ( function_exists( 'apache_setenv' ) ) {
 			@apache_setenv( 'no-gzip', 1 );