/wp-content/plugins/backupbuddy/lib/textreplacebuddy/textreplacebuddy.php
PHP | 318 lines | 133 code | 71 blank | 114 comment | 32 complexity | 779830f6d89a823cd049e0645301ea7f MD5 | raw file
- <?php
- /* pb_backupbuddy_textreplacebuddy class
- *
- * @author Dustin Bolton < http://dustinbolton.com >
- * @since 3.0.0
- *
- * Text replacements using command line if available. There is no good way to do text replacements
- * on a large scale in PHP efficiently.
- *
- * Resulting file stored at $file . '.tmp'. Original file is NOT replaced.
- *
- */
- class pb_backupbuddy_textreplacebuddy {
-
-
- /********** Properties **********/
-
-
- private $_version = '0.0.2'; // Internal version number for this library.
-
- private $_methods = array(); // Available mechanisms for dumping in order of preference.
- private $_commandbuddy;
-
- /********** Methods **********/
-
-
- /* __construct()
- *
- * Default constructor.
- *
- * @param array $force_methods Optional parameter to override automatic method detection. Skips test and runs first method first. Falls back to other methods if any failure.
- * @return
- */
- public function __construct( $force_methods = array() ) {
-
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Loading textreplacebuddy library.' );
-
- // Handles command line execution.
- require_once( pb_backupbuddy::plugin_path() . '/lib/commandbuddy/commandbuddy.php' );
- $this->_commandbuddy = new pb_backupbuddy_commandbuddy();
-
- // Set mechanism for dumping / restoring.
- if ( count( $force_methods ) > 0 ) { // Mechanism forced. Overriding automatic check.
- pb_backupbuddy::status( 'message', 'textreplacebuddy: Settings overriding automatic detection of available database dump methods. Using forced override methods: `' . implode( ',', $force_methods ) . '`.' );
- $this->_methods = $force_methods;
- } else { // No method defined; auto-detect the best.
- $this->_methods = $this->available_textreplace_methods();
- }
- pb_backupbuddy::status( 'message', 'textreplacebuddy: Detected text replacement methods: `' . implode( ',', $this->_methods ) . '`.' );
-
- } // End __construct().
-
-
-
- /* available_dump_methods()
- *
- * function description
- *
- * @param
- * @return string Possible returns: mysqldump, php
- */
- public function available_textreplace_methods() {
-
- pb_backupbuddy::status( 'details', 'textreplace test: Testing available text replacement methods.' );
- if ( function_exists( 'exec' ) ) { // Exec is available so test mysqldump from here.
- pb_backupbuddy::status( 'details', 'textreplace test: exec() function exists. Testing running sed (text replace command) via exec().' );
-
-
- /********** Begin preparing command **********/
- // Handle Windows wanting .exe.
- if ( stristr( PHP_OS, 'WIN' ) && !stristr( PHP_OS, 'DARWIN' ) ) { // Running Windows. (not darwin)
- return array( 'php' ); // Nothing good in Windows available to text replace.
- } else {
- $command = "echo backup | sed 's/backup/buddy/'"; // Will attempt to replace backup with buddy
- }
-
- // Redirect STDERR to STDOUT.
- $command .= ' 2>&1';
-
- /********** End preparing command **********/
-
-
- // Run command.
- pb_backupbuddy::status( 'details', 'textreplace test: Running test command next.' );
- list( $exec_output, $exec_exit_code ) = $this->_commandbuddy->execute( $command );
-
- if ( stristr( implode( ' ', $exec_output ), 'buddy' ) !== false ) { // String Ver appeared in response or usage explanations. Some version dont give version.
- pb_backupbuddy::status( 'details', 'textreplace test: Command appears to be accessible and returns expected response.' );
- return array( 'commandline', 'php' ); // mysqldump best, php next.
- }
-
-
- } else { // No exec() so must fall back to PHP method only.
- pb_backupbuddy::status( 'message', 'textreplace test: Falling back to textreplace compatibility mode (PHP replace). This is slower and more memory intensive.' );
- return array( 'php' );
- }
-
- return array( 'php' );
-
- } // End available_dump_method().
-
-
-
- /* replace()
- *
- * Replace all instances of a string within a file. Automatically falls back.
- * Resulting file stored in $file . 'tmp'. Original file is NOT replaced.
- *
- * @param string $file Full file path to file to search. A .tmp version is made with the final results. Original file is NOT replaced.
- * @param string $search String to search for.
- * @param string $replacement String to replace with.
- * @param string $regex_condition Condition when replacements may happen. Optional.
- * @param string $regex_replace If fallen back into PHP mode then this is needed IF $regex_condition is passed. Optional.
- * @return
- */
- public function string_replace( $file, $search, $replacement, $regex_condition = '', $regex_replace = '' ) {
- $return = false;
-
- pb_backupbuddy::status( 'message', 'Starting text replacement procedure.' );
- pb_backupbuddy::status( 'details', "textreplace being performed on file `{$file}` replacing `{$search}` with `{$replacement}`." );
-
- // Attempt each method in order.
- pb_backupbuddy::status( 'details', 'Preparing to textreplace using available method(s) by priority. Methods: `' . implode( ',', $this->_methods ) . '`' );
- foreach( $this->_methods as $method ) {
- if ( method_exists( $this, "_stringreplace_{$method}" ) ) {
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Attempting replace method `' . $method . '`.' );
- $result = call_user_func( array( $this, "_stringreplace_{$method}" ), $file, $search, $replacement, $regex_condition, $regex_replace );
-
- if ( $result === true ) { // Dump completed succesfully with this method.
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Replace method `' . $method . '` completed successfully.' );
- $return = true;
- break;
- } elseif ( $result === false ) { // Dump failed this method. Will try compatibility fallback to next mode if able.
- // Do nothing. Will try next mode next loop.
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Replace method `' . $method . '` failed. Trying another compatibility mode next if able.' );
- } else {
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Unexepected response: `' . implode( ',', $result ) . '`' );
- }
- }
- }
-
- if ( $return === true ) { // Success.
- pb_backupbuddy::status( 'message', 'Text replace procedure succeeded.' );
- return true;
- } else { // Overall failure.
- pb_backupbuddy::status( 'error', 'Text replace procedure failed.' );
- return false;
- }
-
- } // End dump().
-
-
-
- /* _stringreplace_commandline()
- *
- * Performs actual command line string replacement. VIA sed (command line replace).
- * Case sensitive.
- * Resulting file stored in $file . 'tmp'. Original file is NOT replaced.
- *
- * @param string $file Full file path to file to replace in. a .tmp version is temporarily made.
- * @param string $search String to search for.
- * @param string $replacement String to replace with.
- * @param string $regex_condition Condition when replacements may happen. Optional.
- * @param string $regex_replace NOT used in commandline mode.
- * @param boolean $global Whether or not to globally replace in regex. Default: false (only replace first instance per line).
- * @return boolean True on success; else false.
- */
- private function _stringreplace_commandline( $file, $search, $replacement, $regex_condition = '', $regex_replace = '', $global = false ) {
-
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Preparing to run command line sed (replacement comment) via exec().' );
-
- // Handle optional global replacement.
- if ( $global === true ) {
- $global_flag = 'g';
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Using global replace per line.' );
- } else {
- $global_flag = '';
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Using first instance replace per line.' );
- }
-
- /********** Begin preparing command **********/
- // Handle Windows wanting .exe.
- if ( stristr( PHP_OS, 'WIN' ) && !stristr( PHP_OS, 'DARWIN' ) ) { // Running Windows. (not darwin)
- return false;
- } else {
- if ( $regex_condition == '' ) { // Normal string replace.
- $command = "sed s/{$search}/{$replacement}/{$global_flag} {$file} > {$file}.tmp";
- } else { // Custom regex conditions.
- $command = "sed -E '/{$regex_condition}/s/{$search}/{$replacement}/{$global_flag}' {$file} > {$file}.tmp";
- }
- }
-
- // Redirect STDERR to STDOUT.
- $command .= ' 2>&1';
-
- /********** End preparing command **********/
-
- // Run command.
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Running replace command via exec next.' );
- list( $exec_output, $exec_exit_code ) = $this->_commandbuddy->execute( $command );
-
- // Check the result.
- if ( $exec_exit_code == '0' ) {
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Command appears to succeeded and returned proper response.' );
- if ( file_exists( $file . '.tmp' ) ) { // Temp replacement file found. SUCCESS!
- pb_backupbuddy::status( 'message', 'textreplacebuddy: Temporary text replacement file creation verified.' );
- /*
- if ( true === rename( $file . '.tmp', $file ) ) {
- pb_backupbuddy::status( 'message', 'textreplacebuddy: Temporary moved back to original file. Success.' );
- return true;
- } else {
- pb_backupbuddy::status( 'error', 'textreplacebuddy: Temporary could not be moved back to original file. Failure. Verify permissions.' );
- return false;
- }
- */
- return true;
- } else { // SQL file MISSING. FAILURE!
- pb_backupbuddy::status( 'error', 'textreplacebuddy: Though command reported success temporary replacement file is missing: `' . $output_file . '`.' );
- return false;
- }
- } else {
- pb_backupbuddy::status( 'error', 'textreplacebuddy: Command did not exit normally. Falling back to text replacement compatibility modes.' );
- return false;
- }
-
-
- // Should never get to here.
- pb_backupbuddy::status( 'error', 'textreplacebuddy: Uncaught exception #45323890.' );
- return false;
-
- } // End _stringreplace_commandline().
-
-
-
- /* _stringreplace_php()
- *
- * Performs actual command line string replacement. VIA PHP.
- * Case sensitive.
- * Resulting file stored in $file . 'tmp'.
- *
- * @param string $file Full file path to file to replace in. a .tmp version is temporarily made.
- * @param string $search String to search for.
- * @param string $replacement String to replace with.
- * @param string $regex_condition Condition when replacements may happen. Optional.
- * @param string $regex_replace If fallen back into PHP mode then this is needed IF $regex_condition is passed. Optional.
- * @return boolean True on success; else false.
- */
- private function _stringreplace_php( $file, $search, $replacement, $regex_condition = '', $regex_replace = '' ) {
-
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Starting comptibility mode PHP text replacement.' );
-
-
- $file_o = fopen( $file, 'r' );
- $temp = $file . '.tmp';
-
- if ( !is_writable( $temp ) ) {
- pb_backupbuddy::status( 'error', 'textreplacebuddy: Permission denied writing temporary file `' . $temp . '`.' );
- return false;
- }
-
- if ( is_resource( $file_o ) === true ) {
- while ( feof( $file_o ) === false ) {
-
- if ( $regex_condition != '' ) { // regex
- $content = preg_replace( "/^{$regex_condition}/i", $regex_replace, fgets( $file_o ) );
- } else { // standard string
- $content = str_replace( $search, $replacement, fgets( $file_o ) );
- }
- file_put_contents( $temp, $content, FILE_APPEND );
- }
-
- fclose( $file_o );
- }
-
- //unlink($file);
-
- /*
- $result = rename( $temp, $file );
- if ( $result === false ) {
- pb_backupbuddy::status( 'error', 'textreplacebuddy: Unable to move temporary file back to original file. Failure.' );
- } else {
- pb_backupbuddy::status( 'details', 'textreplacebuddy: Moved temporary file back to original file. Success.' );
- }
- */
-
- return $result;
-
- } // End _stringreplace_php().
-
-
-
- /* get_methods()
- *
- * Get an array of methods. Note: If force overriding methods then detected methods will not be able to display.
- *
- * @return array Array of methods.
- */
- public function get_methods() {
- return $this->_methods;
- } // End get_methods().
-
-
-
- /* set_methods()
- *
- * Set methods. Overrides detected.
- *
- * @param array $methods Array of methods to set.
- * @return null
- */
- public function set_methods( $methods = array() ) {
- $this->_methods = $methods;
- } // End set_methods().
-
-
-
- } // End pb_backupbuddy_mysqlbuddy class.
- ?>