[wp-trac] [WordPress Trac] #41946: Option to delete_with_markers

[WordPress Trac]

#41946: Option to delete_with_markers
---------------------------+-----------------------------
 Reporter:  shivi66        |      Owner:
     Type:  enhancement    |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Rewrite Rules  |    Version:  4.8.2
 Severity:  normal         |   Keywords:
  Focuses:                 |
---------------------------+-----------------------------
 I was trying to develop a plugin for adding speed optimisation code to
 htaccess using builtin functions . I happened to find options to
 insert_with_markers and extract_with_markers. But I found there was not a
 direct option to delete_with_markers. I tried searching as much as
 possible and finally came out with delete_with_markers myself which I have
 used in my plugin (which I will be submitting in a day for review).I have
 refered the insert_with_markers and extract_with_markers to retain the WP
 style. I thought to share , if this could be integrated in WP as well for
 it could be of use to many.

 function delete_with_markers( $filename, $marker ) {
                 if ( ! file_exists( $filename ) ) {
                         if ( ! is_writable( dirname( $filename ) ) ) {
                                 return false;
                         }
                         if ( ! touch( $filename ) ) {
                                 return false;
                         }
                 } elseif ( ! is_writeable( $filename ) ) {
                         return false;
                 }


                 $start_marker = "# BEGIN {$marker}";
                 $end_marker   = "# END {$marker}";

                 $fp = fopen( $filename, 'r+' );
                 if ( ! $fp ) {
                         return false;
                 }

                 // Attempt to get a lock. If the filesystem supports
 locking, this will block until the lock is acquired.

                 flock( $fp, LOCK_EX );

                 $lines = array();
                 while ( ! feof( $fp ) ) {
                         $lines[] = rtrim( fgets( $fp ), "\r\n" );
                 }

               if ( $markerdata = explode( "\n", implode( '', file(
 $filename ) ) ));
                 {
                         $state = false;
                         foreach ( $markerdata as $markerline ) {
                                 if (strpos($markerline, '# BEGIN ' .
 $marker) !== false)
                                         $state = true;
                                 if (! $state )
                                 $result[] = $markerline;
                             if (strpos($markerline, '# END ' . $marker)
 !== false)
                                         $state = false;

                         }
                 }


                 // Generate the new file data
         $new_file_data = implode( "\n", array_merge(
                 $result
                 ) );

                 // Write to the start of the file, and truncate it to that
 length

                 fseek( $fp, 0 );
                 $bytes = fwrite( $fp, $new_file_data );
                 if ( $bytes ) {
                         ftruncate( $fp, ftell( $fp ) );
         }
                 fflush( $fp );
         flock( $fp, LOCK_UN );
                 fclose( $fp );

                 return (bool) $bytes;
 }

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Ticket URL: <https://core.trac.wordpress.org/ticket/41946>
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