X-Git-Url: https://git.heureux-cyclage.org/?p=lhc%2Fweb%2Fwiklou.git;a=blobdiff_plain;f=includes%2Flibs%2FStringUtils.php;h=7303d9beb7931018049d1b2dc52874673a29b5ba;hp=51d108168af43b063fe12389408f5dc377c8734a;hb=efbfa0a727a196e63a2b71f0a82f09150c2be354;hpb=7ca601fd08e9abf7f36ec13164742e143e8efd3f

diff --git a/includes/libs/StringUtils.php b/includes/libs/StringUtils.php
index 51d108168a..7303d9beb7 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.
  *
@@ -313,6 +316,23 @@ class StringUtils {
 		return $text;
 	}
 
+	/**
+	 * Utility function to check if the given string is a valid PCRE 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 isValidPCRERegex( $string ) {
+		AtEase::suppressWarnings();
+		// @phan-suppress-next-line PhanParamSuspiciousOrder False positive
+		$isValid = preg_match( $string, '' );
+		AtEase::restoreWarnings();
+		return $isValid !== false;
+	}
+
 	/**
 	 * Escape a string to make it suitable for inclusion in a preg_replace()
 	 * replacement parameter.