wip

Author: JanJakes

tests/WP_SQLite_Driver_Tests.php

@@ -3151,7 +3151,8 @@ public function testTranslateLikeBinary() {
 
         // Test escaping - "\\\%" is "\" and a wildcard
         $result = $this->assertQuery( "SELECT * FROM _tmp_table WHERE name LIKE BINARY 'special\\\\\\%chars'" );
-        $this->assertCount( 0, $result );
+        $this->assertCount( 1, $result );
+        $this->assertEquals( 'special\\chars', $result[0]->name );
 
         // Test LIKE without BINARY
         $result = $this->assertQuery( "SELECT * FROM _tmp_table WHERE name LIKE 'FIRST'" );

wp-includes/sqlite/class-wp-sqlite-pdo-user-defined-functions.php

@@ -794,41 +794,17 @@ public function _helper_like_to_glob_pattern( $pattern ) {
 		$pattern = str_replace( '*', '[*]', $pattern );
 		$pattern = str_replace( '?', '[?]', $pattern );
 
-		$glob_pattern = '';
-		for ( $i = 0; $i < strlen( $pattern ); $i += 1 ) {
-			$byte1 = $pattern[ $i ];
-			if ( '\\' === $byte1 ) {
-				// Add the escape character.
-				$glob_pattern .= $byte1;
-
-				// Special case: "\\%" and "\\_" are equivalent to "\%" and "\_".
-				// In such case, we need to skip the extra backslash.
-				$byte2 = $pattern[ $i + 1 ] ?? null;
-				$byte3 = $pattern[ $i + 2 ] ?? null;
-				if ( '\\' === $byte2 && ( '%' === $byte3 || '_' === $byte3 ) ) {
-					$glob_pattern .= $byte3;
-					$i += 2;
-					continue;
-				}
-
-				// We're in an escape sequence. Add the next character as it is.
-				$glob_pattern .= $byte2;
-				$i += 1;
-			} elseif ( '%' === $byte1 ) {
-				$glob_pattern .= '*';
-			} elseif ( '_' === $byte1 ) {
-				$glob_pattern .= '?';
-			} else {
-				$glob_pattern .= $byte1;
-			}
-		}
+		$pattern = preg_replace('/(^|[^\\\\](?:\\\\{2}))*(\\\\[%_])/', '$1\\\\$2', $pattern);
 
 		// 1. Unescape C-style escape sequences.
-		$glob_pattern = stripcslashes($glob_pattern);
+		$pattern = stripcslashes($pattern);
 
-		// 2. Unescape LIKE escape sequences.
-		$glob_pattern = preg_replace('/\\\\(.)/', '$1', $glob_pattern);
+		$pattern = preg_replace('/(^|[^\\\\](?:\\\\{2})*)%/', '$1*', $pattern);
+		$pattern = preg_replace('/(^|[^\\\\](?:\\\\{2})*)_/', '$1?', $pattern);
 
-		return $glob_pattern;
+		// 2. Unescape LIKE escape sequences.
+		$pattern = preg_replace('/\\\\(.)/', '$1', $pattern);
+	
+		return $pattern;
 	}
 }