X-Git-Url: https://git.heureux-cyclage.org/?a=blobdiff_plain;f=includes%2Flibs%2FStringUtils.php;h=19dd8fe4d3f98d54921847402854838468d05c06;hb=a1ef77b2d80830fbcb617a83961d78cff9d6e384;hp=51d108168af43b063fe12389408f5dc377c8734a;hpb=27578d8418037d265a563d1261bb2c0de6a7daa5;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/libs/StringUtils.php b/includes/libs/StringUtils.php
index 51d108168a..19dd8fe4d3 100644
--- a/includes/libs/StringUtils.php
+++ b/includes/libs/StringUtils.php
@@ -1,4 +1,7 @@
 <?php
+
+use Wikimedia\AtEase\AtEase;
+
 /**
  * Methods to play with strings.
  *
@@ -340,4 +343,21 @@ class StringUtils {
 			return new ArrayIterator( explode( $separator, $subject ) );
 		}
 	}
+
+	/**
+	 * Utility function to check if the given string is a valid regex. Avoids
+	 * manually calling suppressWarnings and restoreWarnings, and provides a
+	 * one-line solution without the need to use @.
+	 *
+	 * @since 1.34
+	 * @param string $string The string you want to check being a valid regex
+	 * @return bool
+	 */
+	public static function isValidRegex( $string ) {
+		AtEase::suppressWarnings();
+		// @phan-suppress-next-line PhanParamSuspiciousOrder False positive
+		$isValid = preg_match( $string, '' );
+		AtEase::restoreWarnings();
+		return $isValid !== false;
+	}
 }