Use emoji regex as constant

Signed-off-by: Matt Friedman <maf675@gmail.com>

Author: iMattPro

event/listener.php

@@ -227,7 +227,7 @@ public function validate_pwa_options($event)
 				$short_name = $event['cfg_array']['pwa_short_name'];
 
 				// Do not allow emoji
-				if (preg_match('/[\x{1F000}-\x{1F9FF}]|[\x{2600}-\x{27FF}]|[\x{1F300}-\x{1F64F}]|[\x{1F680}-\x{1F6FF}]|[\x{2700}-\x{27BF}]|[\x{FE00}-\x{FE0F}]/u', $short_name))
+				if (preg_match(json_sanitizer::EMOJI_REGEX, $short_name))
 				{
 					$this->add_error($event, 'PWA_SHORT_NAME_INVALID');
 					return;

json/sanitizer.php

@@ -53,19 +53,26 @@ public static function decode(string $json) : array
 	}
 
 	/**
-	 * Remove emoji from a string
-	 * Basic emoji (U+1F300 to U+1F64F)
+	 * regex for emoji
+	 * Basic emoji (U+1F000 to U+1F9FF)
 	 * Transport and map symbols (U+1F680 to U+1F6FF)
 	 * Miscellaneous symbols and pictographs (U+1F300 to U+1F5FF)
 	 * Additional emoji symbols (U+1F600 to U+1F64F)
 	 *
+	 * @var string
+	 */
+	public const EMOJI_REGEX = '/[\x{1F000}-\x{1F9FF}]|[\x{2600}-\x{27FF}]|[\x{1F300}-\x{1F64F}]|[\x{1F680}-\x{1F6FF}]|[\x{1F600}-\x{1F64F}]/u';
+
+	/**
+	 * Remove emoji from a string
+	 *
 	 * @param string $string
 	 * @return string
 	 */
 	public static function strip_emoji(string $string) : string
 	{
 		return preg_replace(
-			'/[\x{1F000}-\x{1F9FF}]|[\x{2600}-\x{27FF}]|[\x{1F300}-\x{1F64F}]|[\x{1F680}-\x{1F6FF}]/u',
+			self::EMOJI_REGEX,
 			'',
 			html_entity_decode($string, ENT_QUOTES, 'UTF-8')
 		);