wp-cli-search-replace-command-170.diff

diff --git a/src/WP_CLI/SearchReplacer.php b/src/WP_CLI/SearchReplacer.php
index f8e314ad..556a5400 100644
--- a/src/WP_CLI/SearchReplacer.php
+++ b/src/WP_CLI/SearchReplacer.php
@@ -83,13 +83,7 @@ private function run_recursively( $data, $serialised, $recursion_level = 0, $vis
 				}
 			}
 
-			// The error suppression operator is not enough in some cases, so we disable
-			// reporting of notices and warnings as well.
-			$error_reporting = error_reporting();
-			error_reporting( $error_reporting & ~E_NOTICE & ~E_WARNING );
-			$unserialized = is_string( $data ) ? @unserialize( $data ) : false;
-			error_reporting( $error_reporting );
-
+			$unserialized = $this->is_serialized( $data ) ? @unserialize( $data ) : false;
 			if ( false !== $unserialized ) {
 				$data = $this->run_recursively( $unserialized, true, $recursion_level + 1 );
 			} elseif ( is_array( $data ) ) {
@@ -185,4 +179,75 @@ private function preg_error_message( $error ) {
 			? $error_names[ $error ]
 			: '<unknown error>';
 	}
+
+	/**
+	 * Checks value to find if it was serialized.
+	 *
+	 * If $data is not a string, then returned value will always be false.
+	 * Serialized data is always a string.
+	 *
+	 * Copied over from WordPress core /src/wp-includes/functions.php.
+	 *
+	 * @param string $data   Value to check to see if was serialized.
+	 * @param bool   $strict Optional. Whether to be strict about the end of the string. Default true.
+	 * @return bool False if not serialized and true if it was.
+	 */
+	private function is_serialized( $data, $strict = true ) {
+		// If it isn't a string, it isn't serialized.
+		if ( ! is_string( $data ) ) {
+			return false;
+		}
+		$data = trim( $data );
+		if ( 'N;' === $data ) {
+			return true;
+		}
+		if ( strlen( $data ) < 4 ) {
+			return false;
+		}
+		if ( ':' !== $data[1] ) {
+			return false;
+		}
+		if ( $strict ) {
+			$lastc = substr( $data, -1 );
+			if ( ';' !== $lastc && '}' !== $lastc ) {
+				return false;
+			}
+		} else {
+			$semicolon = strpos( $data, ';' );
+			$brace     = strpos( $data, '}' );
+			// Either ; or } must exist.
+			if ( false === $semicolon && false === $brace ) {
+				return false;
+			}
+			// But neither must be in the first X characters.
+			if ( false !== $semicolon && $semicolon < 3 ) {
+				return false;
+			}
+			if ( false !== $brace && $brace < 4 ) {
+				return false;
+			}
+		}
+		$token = $data[0];
+		switch ( $token ) {
+			case 's':
+				if ( $strict ) {
+					if ( '"' !== substr( $data, -2, 1 ) ) {
+						return false;
+					}
+				} elseif ( false === strpos( $data, '"' ) ) {
+					return false;
+				}
+				// Or else fall through.
+			case 'a':
+			case 'O':
+			case 'E':
+				return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
+			case 'b':
+			case 'i':
+			case 'd':
+				$end = $strict ? '$' : '';
+				return (bool) preg_match( "/^{$token}:[0-9.E+-]+;$end/", $data );
+		}
+		return false;
+	}
 }