insideout10 / wordlift-plugin

src/includes/class-wordlift-sparql-service.php

Indentation +243 added lines, -243 removed lines

@@ -11,279 +11,279 @@
  */
 class Wordlift_Sparql_Service {
 
-	/**
-	 * A {@link Wordlift_Log_Service} instance.
-	 *
-	 * @since  3.6.0
-	 * @access private
-	 * @var \Wordlift_Log_Service $log A {@link Wordlift_Log_Service} instance.
-	 */
-	private $log;
-
-	/**
-	 * The {@link Wordlift_Sparql_Service} singleton instance.
-	 *
-	 * @since  3.6.0
-	 * @access private
-	 * @var \Wordlift_Sparql_Service $instance The {@link Wordlift_Sparql_Service} singleton instance.
-	 */
-	private static $instance;
-
-	/**
-	 * Create a {@link Wordlift_Sparql_Service} instance.
-	 *
-	 * @since 3.6.0
-	 */
-	public function __construct() {
-
-		$this->log = Wordlift_Log_Service::get_logger( 'Wordlift_Sparql_Service' );
-
-		self::$instance = $this;
-
-	}
-
-	/**
-	 * Get the singleton instance of the {@link Wordlift_Sparql_Service}.
-	 *
-	 * @since 3.6.0
-	 * @return \Wordlift_Sparql_Service
-	 */
-	public static function get_instance() {
-
-		return self::$instance;
-	}
-
-	/**
-	 * Queue a SPARQL statement for execution.
-	 *
-	 * @since 3.6.0
-	 *
-	 * @param string $stmt  The SPARQL statement.
-	 * @param bool   $queue Whether to queue the statement for asynchronous
-	 *                      execution.
-	 */
-	public function execute( $stmt, $queue = WL_ENABLE_SPARQL_UPDATE_QUERIES_BUFFERING ) {
-
-		rl_execute_sparql_update_query( $stmt, $queue );
-
-	}
-
-	/**
-	 * Run the SPARQL queries buffered for the specified request id.
-	 *
-	 * @since 3.13.2
-	 *
-	 * @param string $request_id A unique request id.
-	 */
-	public function run_sparql_query( $request_id ) {
-
-		$this->log->debug( "Running SPARQL queries..." );
-
-		// Look for a free temporary filename.
-		for ( $index = 1; $index < PHP_INT_MAX; $index ++ ) {
-			$filename = WL_TEMP_DIR . $request_id . "-$index.sparql";
-
-			// Bail out if there are no files left.
-			if ( ! file_exists( $filename ) ) {
-				break;
-			}
-
-			$this->log->debug( "Running SPARQL from $filename..." );
-
-			// Get the query saved in the file.
-			$query = file_get_contents( $filename );
-
-			// Execute the SPARQL query.
-			rl_execute_sparql_update_query( $query, false );
-
-			// Delete the temporary file.
-			unlink( $filename );
-		}
-
-		// Reindex the triple store.
-		wordlift_reindex_triple_store();
-
-	}
-
-	/**
-	 * Queue a SPARQL statement for asynchronous execution.
-	 *
-	 * @since 3.13.2
-	 *
-	 * @param string $stmt The SPARQL statement.
-	 */
-	public function queue( $stmt ) {
-
-		// Get a temporary filename.
-		$filename = $this->get_temporary_file_for_sparql();
+    /**
+     * A {@link Wordlift_Log_Service} instance.
+     *
+     * @since  3.6.0
+     * @access private
+     * @var \Wordlift_Log_Service $log A {@link Wordlift_Log_Service} instance.
+     */
+    private $log;
+
+    /**
+     * The {@link Wordlift_Sparql_Service} singleton instance.
+     *
+     * @since  3.6.0
+     * @access private
+     * @var \Wordlift_Sparql_Service $instance The {@link Wordlift_Sparql_Service} singleton instance.
+     */
+    private static $instance;
+
+    /**
+     * Create a {@link Wordlift_Sparql_Service} instance.
+     *
+     * @since 3.6.0
+     */
+    public function __construct() {
+
+        $this->log = Wordlift_Log_Service::get_logger( 'Wordlift_Sparql_Service' );
+
+        self::$instance = $this;
+
+    }
+
+    /**
+     * Get the singleton instance of the {@link Wordlift_Sparql_Service}.
+     *
+     * @since 3.6.0
+     * @return \Wordlift_Sparql_Service
+     */
+    public static function get_instance() {
+
+        return self::$instance;
+    }
+
+    /**
+     * Queue a SPARQL statement for execution.
+     *
+     * @since 3.6.0
+     *
+     * @param string $stmt  The SPARQL statement.
+     * @param bool   $queue Whether to queue the statement for asynchronous
+     *                      execution.
+     */
+    public function execute( $stmt, $queue = WL_ENABLE_SPARQL_UPDATE_QUERIES_BUFFERING ) {
+
+        rl_execute_sparql_update_query( $stmt, $queue );
+
+    }
+
+    /**
+     * Run the SPARQL queries buffered for the specified request id.
+     *
+     * @since 3.13.2
+     *
+     * @param string $request_id A unique request id.
+     */
+    public function run_sparql_query( $request_id ) {
+
+        $this->log->debug( "Running SPARQL queries..." );
+
+        // Look for a free temporary filename.
+        for ( $index = 1; $index < PHP_INT_MAX; $index ++ ) {
+            $filename = WL_TEMP_DIR . $request_id . "-$index.sparql";
+
+            // Bail out if there are no files left.
+            if ( ! file_exists( $filename ) ) {
+                break;
+            }
+
+            $this->log->debug( "Running SPARQL from $filename..." );
+
+            // Get the query saved in the file.
+            $query = file_get_contents( $filename );
+
+            // Execute the SPARQL query.
+            rl_execute_sparql_update_query( $query, false );
+
+            // Delete the temporary file.
+            unlink( $filename );
+        }
+
+        // Reindex the triple store.
+        wordlift_reindex_triple_store();
+
+    }
+
+    /**
+     * Queue a SPARQL statement for asynchronous execution.
+     *
+     * @since 3.13.2
+     *
+     * @param string $stmt The SPARQL statement.
+     */
+    public function queue( $stmt ) {
+
+        // Get a temporary filename.
+        $filename = $this->get_temporary_file_for_sparql();
 
-		$this->log->debug( "Buffering SPARQL to file $filename..." );
+        $this->log->debug( "Buffering SPARQL to file $filename..." );
 
-		// Write the contents to the temporary filename.
-		file_put_contents( $filename, $stmt . "\n", FILE_APPEND );
+        // Write the contents to the temporary filename.
+        file_put_contents( $filename, $stmt . "\n", FILE_APPEND );
 
-	}
+    }
 
-	/**
-	 * Get a temporary filename where to store SPARQL queries.
-	 *
-	 * @since 3.13.2
-	 *
-	 * @return string The filename.
-	 * @throws Exception An exception is thrown if there are already 1.000
-	 *                   temporary files for this request.
-	 */
-	private function get_temporary_file_for_sparql() {
+    /**
+     * Get a temporary filename where to store SPARQL queries.
+     *
+     * @since 3.13.2
+     *
+     * @return string The filename.
+     * @throws Exception An exception is thrown if there are already 1.000
+     *                   temporary files for this request.
+     */
+    private function get_temporary_file_for_sparql() {
 
-		// Look for a free temporary filename.
-		for ( $index = 1; $index < PHP_INT_MAX; $index ++ ) {
-			$filename = WL_TEMP_DIR . WL_REQUEST_ID . "-$index.sparql";
+        // Look for a free temporary filename.
+        for ( $index = 1; $index < PHP_INT_MAX; $index ++ ) {
+            $filename = WL_TEMP_DIR . WL_REQUEST_ID . "-$index.sparql";
 
-			if ( ! file_exists( $filename ) ) {
+            if ( ! file_exists( $filename ) ) {
 
-				// Only if this it the first buffered SPARQL, then launch the
-				// action which will be handled by the Async Task. The Async
-				// Task will take care of all the buffered files.
-				if ( 1 === $index ) {
-					do_action( 'wl_run_sparql_query', WL_REQUEST_ID );
-				}
+                // Only if this it the first buffered SPARQL, then launch the
+                // action which will be handled by the Async Task. The Async
+                // Task will take care of all the buffered files.
+                if ( 1 === $index ) {
+                    do_action( 'wl_run_sparql_query', WL_REQUEST_ID );
+                }
 
-				// Return the temporary filename.
-				return $filename;
-			}
-		}
+                // Return the temporary filename.
+                return $filename;
+            }
+        }
 
-		throw new Exception( 'Cannot create a temporary file [ ' . WL_TEMP_DIR . WL_REQUEST_ID . ' ].' );
-	}
+        throw new Exception( 'Cannot create a temporary file [ ' . WL_TEMP_DIR . WL_REQUEST_ID . ' ].' );
+    }
 
-	/**
-	 * Execute the SELECT query.
-	 *
-	 * @since 3.12.2
-	 *
-	 * @param string $query The SELECT query to execute.
-	 *
-	 * @return WP_Error|array The response or WP_Error on failure.
-	 */
-	public function select( $query ) {
+    /**
+     * Execute the SELECT query.
+     *
+     * @since 3.12.2
+     *
+     * @param string $query The SELECT query to execute.
+     *
+     * @return WP_Error|array The response or WP_Error on failure.
+     */
+    public function select( $query ) {
 
-		// Prepare the SPARQL statement by prepending the default namespaces.
-		$sparql = rl_sparql_prefixes() . "\n" . $query;
+        // Prepare the SPARQL statement by prepending the default namespaces.
+        $sparql = rl_sparql_prefixes() . "\n" . $query;
 
-		// Get the SPARQL SELECT URL.
-		$url = wl_configuration_get_query_select_url() . urlencode( $sparql );
+        // Get the SPARQL SELECT URL.
+        $url = wl_configuration_get_query_select_url() . urlencode( $sparql );
 
-		// Prepare the request.
-		$args = unserialize( WL_REDLINK_API_HTTP_OPTIONS );
+        // Prepare the request.
+        $args = unserialize( WL_REDLINK_API_HTTP_OPTIONS );
 
-		return wp_remote_get( $url, $args );
-	}
+        return wp_remote_get( $url, $args );
+    }
 
-	/**
-	 * Formats the provided value according to the specified type in order to
-	 * insert the value using SPARQL. The value is also escaped.
-	 *
-	 * @since 3.6.0
-	 *
-	 * @param string $value The value.
-	 * @param string $type  The value type.
-	 *
-	 * @return string The formatted value for SPARQL statements.
-	 */
-	public function format( $value, $type ) {
+    /**
+     * Formats the provided value according to the specified type in order to
+     * insert the value using SPARQL. The value is also escaped.
+     *
+     * @since 3.6.0
+     *
+     * @param string $value The value.
+     * @param string $type  The value type.
+     *
+     * @return string The formatted value for SPARQL statements.
+     */
+    public function format( $value, $type ) {
 
-		// see https://www.w3.org/TR/sparql11-query/.
-
-		switch ( $type ) {
+        // see https://www.w3.org/TR/sparql11-query/.
+
+        switch ( $type ) {
 
-			case Wordlift_Schema_Service::DATA_TYPE_BOOLEAN:
-
-				// SPARQL supports 'true' and 'false', so we evaluate the $value
-				// and return true/false accordingly.
-				return $value ? 'true' : 'false';
-
-			case Wordlift_Schema_Service::DATA_TYPE_DATE:
-
-				return sprintf( '"%s"^^xsd:date', self::escape( $value ) );
-
-
-			case Wordlift_Schema_Service::DATA_TYPE_DOUBLE:
-
-				return sprintf( '"%s"^^xsd:double', self::escape( $value ) );
+            case Wordlift_Schema_Service::DATA_TYPE_BOOLEAN:
+
+                // SPARQL supports 'true' and 'false', so we evaluate the $value
+                // and return true/false accordingly.
+                return $value ? 'true' : 'false';
+
+            case Wordlift_Schema_Service::DATA_TYPE_DATE:
+
+                return sprintf( '"%s"^^xsd:date', self::escape( $value ) );
+
+
+            case Wordlift_Schema_Service::DATA_TYPE_DOUBLE:
+
+                return sprintf( '"%s"^^xsd:double', self::escape( $value ) );
 
-			case Wordlift_Schema_Service::DATA_TYPE_INTEGER:
+            case Wordlift_Schema_Service::DATA_TYPE_INTEGER:
 
-				return sprintf( '"%s"^^xsd:integer', self::escape( $value ) );
+                return sprintf( '"%s"^^xsd:integer', self::escape( $value ) );
 
-			case Wordlift_Schema_Service::DATA_TYPE_STRING:
+            case Wordlift_Schema_Service::DATA_TYPE_STRING:
 
-				return sprintf( '"%s"^^xsd:string', self::escape( $value ) );
+                return sprintf( '"%s"^^xsd:string', self::escape( $value ) );
 
-			case Wordlift_Schema_Service::DATA_TYPE_URI:
-
-				return sprintf( '<%s>', self::escape_uri( $value ) );
-
-			default:
-
-				$this->log->warn( "Unknown data type [ type :: $type ]" );
-
-				// Try to insert the value anyway.
-				return sprintf( '"%s"', self::escape( $value ) );
-		}
+            case Wordlift_Schema_Service::DATA_TYPE_URI:
+
+                return sprintf( '<%s>', self::escape_uri( $value ) );
+
+            default:
+
+                $this->log->warn( "Unknown data type [ type :: $type ]" );
+
+                // Try to insert the value anyway.
+                return sprintf( '"%s"', self::escape( $value ) );
+        }
 
-	}
+    }
 
-	/**
-	 * Escapes an URI for a SPARQL statement.
-	 *
-	 * @since 3.6.0
-	 *
-	 * @param string $uri The URI to escape.
-	 *
-	 * @return string The escaped URI.
-	 */
-	public static function escape_uri( $uri ) {
+    /**
+     * Escapes an URI for a SPARQL statement.
+     *
+     * @since 3.6.0
+     *
+     * @param string $uri The URI to escape.
+     *
+     * @return string The escaped URI.
+     */
+    public static function escape_uri( $uri ) {
 
-		// Should we validate the IRI?
-		// http://www.w3.org/TR/sparql11-query/#QSynIRI
+        // Should we validate the IRI?
+        // http://www.w3.org/TR/sparql11-query/#QSynIRI
 
-		$uri = str_replace( '<', '\<', $uri );
-		$uri = str_replace( '>', '\>', $uri );
+        $uri = str_replace( '<', '\<', $uri );
+        $uri = str_replace( '>', '\>', $uri );
 
-		return $uri;
-	}
+        return $uri;
+    }
 
-	/**
-	 * Escapes a string for a SPARQL statement.
-	 *
-	 * @since 3.6.0
-	 *
-	 * @param string $string The string to escape.
-	 *
-	 * @return string The escaped string.
-	 */
-	public static function escape( $string ) {
+    /**
+     * Escapes a string for a SPARQL statement.
+     *
+     * @since 3.6.0
+     *
+     * @param string $string The string to escape.
+     *
+     * @return string The escaped string.
+     */
+    public static function escape( $string ) {
 
-		// see http://www.w3.org/TR/rdf-sparql-query/
-		//    '\t'	U+0009 (tab)
-		//    '\n'	U+000A (line feed)
-		//    '\r'	U+000D (carriage return)
-		//    '\b'	U+0008 (backspace)
-		//    '\f'	U+000C (form feed)
-		//    '\"'	U+0022 (quotation mark, double quote mark)
-		//    "\'"	U+0027 (apostrophe-quote, single quote mark)
-		//    '\\'	U+005C (backslash)
+        // see http://www.w3.org/TR/rdf-sparql-query/
+        //    '\t'	U+0009 (tab)
+        //    '\n'	U+000A (line feed)
+        //    '\r'	U+000D (carriage return)
+        //    '\b'	U+0008 (backspace)
+        //    '\f'	U+000C (form feed)
+        //    '\"'	U+0022 (quotation mark, double quote mark)
+        //    "\'"	U+0027 (apostrophe-quote, single quote mark)
+        //    '\\'	U+005C (backslash)
 
-		$string = str_replace( '\\', '\\\\', $string );
-		$string = str_replace( '\'', '\\\'', $string );
-		$string = str_replace( '"', '\\"', $string );
-		$string = str_replace( "\f", '\\f', $string );
-		$string = str_replace( "\b", '\\b', $string );
-		$string = str_replace( "\r", '\\r', $string );
-		$string = str_replace( "\n", '\\n', $string );
-		$string = str_replace( "\t", '\\t', $string );
+        $string = str_replace( '\\', '\\\\', $string );
+        $string = str_replace( '\'', '\\\'', $string );
+        $string = str_replace( '"', '\\"', $string );
+        $string = str_replace( "\f", '\\f', $string );
+        $string = str_replace( "\b", '\\b', $string );
+        $string = str_replace( "\r", '\\r', $string );
+        $string = str_replace( "\n", '\\n', $string );
+        $string = str_replace( "\t", '\\t', $string );
 
-		return $string;
-	}
+        return $string;
+    }
 
 }

Spacing +47 added lines, -47 removed lines

@@ -36,7 +36,7 @@ 
 	 */
 	public function __construct() {
 
-		$this->log = Wordlift_Log_Service::get_logger( 'Wordlift_Sparql_Service' );
+		$this->log = Wordlift_Log_Service::get_logger('Wordlift_Sparql_Service');
 
 		self::$instance = $this;
 
@@ -62,9 +62,9 @@ 
 	 * @param bool   $queue Whether to queue the statement for asynchronous
 	 *                      execution.
 	 */
-	public function execute( $stmt, $queue = WL_ENABLE_SPARQL_UPDATE_QUERIES_BUFFERING ) {
+	public function execute($stmt, $queue = WL_ENABLE_SPARQL_UPDATE_QUERIES_BUFFERING) {
 
-		rl_execute_sparql_update_query( $stmt, $queue );
+		rl_execute_sparql_update_query($stmt, $queue);
 
 	}
 
@@ -75,29 +75,29 @@ 
 	 *
 	 * @param string $request_id A unique request id.
 	 */
-	public function run_sparql_query( $request_id ) {
+	public function run_sparql_query($request_id) {
 
-		$this->log->debug( "Running SPARQL queries..." );
+		$this->log->debug("Running SPARQL queries...");
 
 		// Look for a free temporary filename.
-		for ( $index = 1; $index < PHP_INT_MAX; $index ++ ) {
-			$filename = WL_TEMP_DIR . $request_id . "-$index.sparql";
+		for ($index = 1; $index < PHP_INT_MAX; $index++) {
+			$filename = WL_TEMP_DIR.$request_id."-$index.sparql";
 
 			// Bail out if there are no files left.
-			if ( ! file_exists( $filename ) ) {
+			if ( ! file_exists($filename)) {
 				break;
 			}
 
-			$this->log->debug( "Running SPARQL from $filename..." );
+			$this->log->debug("Running SPARQL from $filename...");
 
 			// Get the query saved in the file.
-			$query = file_get_contents( $filename );
+			$query = file_get_contents($filename);
 
 			// Execute the SPARQL query.
-			rl_execute_sparql_update_query( $query, false );
+			rl_execute_sparql_update_query($query, false);
 
 			// Delete the temporary file.
-			unlink( $filename );
+			unlink($filename);
 		}
 
 		// Reindex the triple store.
@@ -112,15 +112,15 @@ 
 	 *
 	 * @param string $stmt The SPARQL statement.
 	 */
-	public function queue( $stmt ) {
+	public function queue($stmt) {
 
 		// Get a temporary filename.
 		$filename = $this->get_temporary_file_for_sparql();
 
-		$this->log->debug( "Buffering SPARQL to file $filename..." );
+		$this->log->debug("Buffering SPARQL to file $filename...");
 
 		// Write the contents to the temporary filename.
-		file_put_contents( $filename, $stmt . "\n", FILE_APPEND );
+		file_put_contents($filename, $stmt."\n", FILE_APPEND);
 
 	}
 
@@ -136,16 +136,16 @@ 
 	private function get_temporary_file_for_sparql() {
 
 		// Look for a free temporary filename.
-		for ( $index = 1; $index < PHP_INT_MAX; $index ++ ) {
-			$filename = WL_TEMP_DIR . WL_REQUEST_ID . "-$index.sparql";
+		for ($index = 1; $index < PHP_INT_MAX; $index++) {
+			$filename = WL_TEMP_DIR.WL_REQUEST_ID."-$index.sparql";
 
-			if ( ! file_exists( $filename ) ) {
+			if ( ! file_exists($filename)) {
 
 				// Only if this it the first buffered SPARQL, then launch the
 				// action which will be handled by the Async Task. The Async
 				// Task will take care of all the buffered files.
-				if ( 1 === $index ) {
-					do_action( 'wl_run_sparql_query', WL_REQUEST_ID );
+				if (1 === $index) {
+					do_action('wl_run_sparql_query', WL_REQUEST_ID);
 				}
 
 				// Return the temporary filename.
@@ -153,7 +153,7 @@ 
 			}
 		}
 
-		throw new Exception( 'Cannot create a temporary file [ ' . WL_TEMP_DIR . WL_REQUEST_ID . ' ].' );
+		throw new Exception('Cannot create a temporary file [ '.WL_TEMP_DIR.WL_REQUEST_ID.' ].');
 	}
 
 	/**
@@ -165,18 +165,18 @@ 
 	 *
 	 * @return WP_Error|array The response or WP_Error on failure.
 	 */
-	public function select( $query ) {
+	public function select($query) {
 
 		// Prepare the SPARQL statement by prepending the default namespaces.
-		$sparql = rl_sparql_prefixes() . "\n" . $query;
+		$sparql = rl_sparql_prefixes()."\n".$query;
 
 		// Get the SPARQL SELECT URL.
-		$url = wl_configuration_get_query_select_url() . urlencode( $sparql );
+		$url = wl_configuration_get_query_select_url().urlencode($sparql);
 
 		// Prepare the request.
-		$args = unserialize( WL_REDLINK_API_HTTP_OPTIONS );
+		$args = unserialize(WL_REDLINK_API_HTTP_OPTIONS);
 
-		return wp_remote_get( $url, $args );
+		return wp_remote_get($url, $args);
 	}
 
 	/**
@@ -190,11 +190,11 @@ 
 	 *
 	 * @return string The formatted value for SPARQL statements.
 	 */
-	public function format( $value, $type ) {
+	public function format($value, $type) {
 
 		// see https://www.w3.org/TR/sparql11-query/.
 
-		switch ( $type ) {
+		switch ($type) {
 
 			case Wordlift_Schema_Service::DATA_TYPE_BOOLEAN:
 
@@ -204,31 +204,31 @@ 
 
 			case Wordlift_Schema_Service::DATA_TYPE_DATE:
 
-				return sprintf( '"%s"^^xsd:date', self::escape( $value ) );
+				return sprintf('"%s"^^xsd:date', self::escape($value));
 
 
 			case Wordlift_Schema_Service::DATA_TYPE_DOUBLE:
 
-				return sprintf( '"%s"^^xsd:double', self::escape( $value ) );
+				return sprintf('"%s"^^xsd:double', self::escape($value));
 
 			case Wordlift_Schema_Service::DATA_TYPE_INTEGER:
 
-				return sprintf( '"%s"^^xsd:integer', self::escape( $value ) );
+				return sprintf('"%s"^^xsd:integer', self::escape($value));
 
 			case Wordlift_Schema_Service::DATA_TYPE_STRING:
 
-				return sprintf( '"%s"^^xsd:string', self::escape( $value ) );
+				return sprintf('"%s"^^xsd:string', self::escape($value));
 
 			case Wordlift_Schema_Service::DATA_TYPE_URI:
 
-				return sprintf( '<%s>', self::escape_uri( $value ) );
+				return sprintf('<%s>', self::escape_uri($value));
 
 			default:
 
-				$this->log->warn( "Unknown data type [ type :: $type ]" );
+				$this->log->warn("Unknown data type [ type :: $type ]");
 
 				// Try to insert the value anyway.
-				return sprintf( '"%s"', self::escape( $value ) );
+				return sprintf('"%s"', self::escape($value));
 		}
 
 	}
@@ -242,13 +242,13 @@ 
 	 *
 	 * @return string The escaped URI.
 	 */
-	public static function escape_uri( $uri ) {
+	public static function escape_uri($uri) {
 
 		// Should we validate the IRI?
 		// http://www.w3.org/TR/sparql11-query/#QSynIRI
 
-		$uri = str_replace( '<', '\<', $uri );
-		$uri = str_replace( '>', '\>', $uri );
+		$uri = str_replace('<', '\<', $uri);
+		$uri = str_replace('>', '\>', $uri);
 
 		return $uri;
 	}
@@ -262,7 +262,7 @@ 
 	 *
 	 * @return string The escaped string.
 	 */
-	public static function escape( $string ) {
+	public static function escape($string) {
 
 		// see http://www.w3.org/TR/rdf-sparql-query/
 		//    '\t'	U+0009 (tab)
@@ -274,14 +274,14 @@ 
 		//    "\'"	U+0027 (apostrophe-quote, single quote mark)
 		//    '\\'	U+005C (backslash)
 
-		$string = str_replace( '\\', '\\\\', $string );
-		$string = str_replace( '\'', '\\\'', $string );
-		$string = str_replace( '"', '\\"', $string );
-		$string = str_replace( "\f", '\\f', $string );
-		$string = str_replace( "\b", '\\b', $string );
-		$string = str_replace( "\r", '\\r', $string );
-		$string = str_replace( "\n", '\\n', $string );
-		$string = str_replace( "\t", '\\t', $string );
+		$string = str_replace('\\', '\\\\', $string);
+		$string = str_replace('\'', '\\\'', $string);
+		$string = str_replace('"', '\\"', $string);
+		$string = str_replace("\f", '\\f', $string);
+		$string = str_replace("\b", '\\b', $string);
+		$string = str_replace("\r", '\\r', $string);
+		$string = str_replace("\n", '\\n', $string);
+		$string = str_replace("\t", '\\t', $string);
 
 		return $string;
 	}