wp-admin/includes/image.php

   1 <?php
   2 /**
   3  * File contains all the administration image manipulation functions.
   4  *
   5  * @package WordPress
   6  * @subpackage Administration
   7  */
   8
   9 /**
  10  * Crop an Image to a given size.
  11  *
  12  * @since 2.1.0
  13  *
  14  * @param string|int $src The source file or Attachment ID.
  15  * @param int $src_x The start x position to crop from.
  16  * @param int $src_y The start y position to crop from.
  17  * @param int $src_w The width to crop.
  18  * @param int $src_h The height to crop.
  19  * @param int $dst_w The destination width.
  20  * @param int $dst_h The destination height.
  21  * @param int $src_abs Optional. If the source crop points are absolute.
  22  * @param string $dst_file Optional. The destination file to write to.
  23  * @return string|WP_Error New filepath on success, WP_Error on failure.
  24  */
  25 function wp_crop_image( $src, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) {
  26         $src_file = $src;
  27         if ( is_numeric( $src ) ) { // Handle int as attachment ID
  28                 $src_file = get_attached_file( $src );
  29
  30                 if ( ! file_exists( $src_file ) ) {
  31                         // If the file doesn't exist, attempt a url fopen on the src link.
  32                         // This can occur with certain file replication plugins.
  33                         $src = _load_image_to_edit_path( $src, 'full' );
  34                 } else {
  35                         $src = $src_file;
  36                 }
  37         }
  38
  39         $editor = wp_get_image_editor( $src );
  40         if ( is_wp_error( $editor ) )
  41                 return $editor;
  42
  43         $src = $editor->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs );
  44         if ( is_wp_error( $src ) )
  45                 return $src;
  46
  47         if ( ! $dst_file )
  48                 $dst_file = str_replace( basename( $src_file ), 'cropped-' . basename( $src_file ), $src_file );
  49
  50         /*
  51          * The directory containing the original file may no longer exist when
  52          * using a replication plugin.
  53          */
  54         wp_mkdir_p( dirname( $dst_file ) );
  55
  56         $dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), basename( $dst_file ) );
  57
  58         $result = $editor->save( $dst_file );
  59         if ( is_wp_error( $result ) )
  60                 return $result;
  61
  62         return $dst_file;
  63 }
  64
  65 /**
  66  * Generate post thumbnail attachment meta data.
  67  *
  68  * @since 2.1.0
  69  *
  70  * @param int $attachment_id Attachment Id to process.
  71  * @param string $file Filepath of the Attached image.
  72  * @return mixed Metadata for attachment.
  73  */
  74 function wp_generate_attachment_metadata( $attachment_id, $file ) {
  75         $attachment = get_post( $attachment_id );
  76
  77         $metadata = array();
  78         $support = false;
  79         if ( preg_match('!^image/!', get_post_mime_type( $attachment )) && file_is_displayable_image($file) ) {
  80                 $imagesize = getimagesize( $file );
  81                 $metadata['width'] = $imagesize[0];
  82                 $metadata['height'] = $imagesize[1];
  83
  84                 // Make the file path relative to the upload dir.
  85                 $metadata['file'] = _wp_relative_upload_path($file);
  86
  87                 // Make thumbnails and other intermediate sizes.
  88                 global $_wp_additional_image_sizes;
  89
  90                 $sizes = array();
  91                 foreach ( get_intermediate_image_sizes() as $s ) {
  92                         $sizes[$s] = array( 'width' => '', 'height' => '', 'crop' => false );
  93                         if ( isset( $_wp_additional_image_sizes[$s]['width'] ) )
  94                                 $sizes[$s]['width'] = intval( $_wp_additional_image_sizes[$s]['width'] ); // For theme-added sizes
  95                         else
  96                                 $sizes[$s]['width'] = get_option( "{$s}_size_w" ); // For default sizes set in options
  97                         if ( isset( $_wp_additional_image_sizes[$s]['height'] ) )
  98                                 $sizes[$s]['height'] = intval( $_wp_additional_image_sizes[$s]['height'] ); // For theme-added sizes
  99                         else
 100                                 $sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options
 101                         if ( isset( $_wp_additional_image_sizes[$s]['crop'] ) )
 102                                 $sizes[$s]['crop'] = $_wp_additional_image_sizes[$s]['crop']; // For theme-added sizes
 103                         else
 104                                 $sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options
 105                 }
 106
 107                 /**
 108                  * Filter the image sizes automatically generated when uploading an image.
 109                  *
 110                  * @since 2.9.0
 111                  *
 112                  * @param array $sizes An associative array of image sizes.
 113                  */
 114                 $sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );
 115
 116                 if ( $sizes ) {
 117                         $editor = wp_get_image_editor( $file );
 118
 119                         if ( ! is_wp_error( $editor ) )
 120                                 $metadata['sizes'] = $editor->multi_resize( $sizes );
 121                 } else {
 122                         $metadata['sizes'] = array();
 123                 }
 124
 125                 // Fetch additional metadata from EXIF/IPTC.
 126                 $image_meta = wp_read_image_metadata( $file );
 127                 if ( $image_meta )
 128                         $metadata['image_meta'] = $image_meta;
 129
 130         } elseif ( preg_match( '#^video/#', get_post_mime_type( $attachment ) ) ) {
 131                 $metadata = wp_read_video_metadata( $file );
 132                 $support = current_theme_supports( 'post-thumbnails', 'attachment:video' ) || post_type_supports( 'attachment:video', 'thumbnail' );
 133         } elseif ( preg_match( '#^audio/#', get_post_mime_type( $attachment ) ) ) {
 134                 $metadata = wp_read_audio_metadata( $file );
 135                 $support = current_theme_supports( 'post-thumbnails', 'attachment:audio' ) || post_type_supports( 'attachment:audio', 'thumbnail' );
 136         }
 137
 138         if ( $support && ! empty( $metadata['image']['data'] ) ) {
 139                 // Check for existing cover.
 140                 $hash = md5( $metadata['image']['data'] );
 141                 $posts = get_posts( array(
 142                         'fields' => 'ids',
 143                         'post_type' => 'attachment',
 144                         'post_mime_type' => $metadata['image']['mime'],
 145                         'post_status' => 'inherit',
 146                         'posts_per_page' => 1,
 147                         'meta_key' => '_cover_hash',
 148                         'meta_value' => $hash
 149                 ) );
 150                 $exists = reset( $posts );
 151
 152                 if ( ! empty( $exists ) ) {
 153                         update_post_meta( $attachment_id, '_thumbnail_id', $exists );
 154                 } else {
 155                         $ext = '.jpg';
 156                         switch ( $metadata['image']['mime'] ) {
 157                         case 'image/gif':
 158                                 $ext = '.gif';
 159                                 break;
 160                         case 'image/png':
 161                                 $ext = '.png';
 162                                 break;
 163                         }
 164                         $basename = str_replace( '.', '-', basename( $file ) ) . '-image' . $ext;
 165                         $uploaded = wp_upload_bits( $basename, '', $metadata['image']['data'] );
 166                         if ( false === $uploaded['error'] ) {
 167                                 $image_attachment = array(
 168                                         'post_mime_type' => $metadata['image']['mime'],
 169                                         'post_type' => 'attachment',
 170                                         'post_content' => '',
 171                                 );
 172                                 /**
 173                                  * Filter the parameters for the attachment thumbnail creation.
 174                                  *
 175                                  * @since 3.9.0
 176                                  *
 177                                  * @param array $image_attachment An array of parameters to create the thumbnail.
 178                                  * @param array $metadata         Current attachment metadata.
 179                                  * @param array $uploaded         An array containing the thumbnail path and url.
 180                                  */
 181                                 $image_attachment = apply_filters( 'attachment_thumbnail_args', $image_attachment, $metadata, $uploaded );
 182
 183                                 $sub_attachment_id = wp_insert_attachment( $image_attachment, $uploaded['file'] );
 184                                 add_post_meta( $sub_attachment_id, '_cover_hash', $hash );
 185                                 $attach_data = wp_generate_attachment_metadata( $sub_attachment_id, $uploaded['file'] );
 186                                 wp_update_attachment_metadata( $sub_attachment_id, $attach_data );
 187                                 update_post_meta( $attachment_id, '_thumbnail_id', $sub_attachment_id );
 188                         }
 189                 }
 190         }
 191
 192         // Remove the blob of binary data from the array.
 193         if ( isset( $metadata['image']['data'] ) )
 194                 unset( $metadata['image']['data'] );
 195
 196         /**
 197          * Filter the generated attachment meta data.
 198          *
 199          * @since 2.1.0
 200          *
 201          * @param array $metadata      An array of attachment meta data.
 202          * @param int   $attachment_id Current attachment ID.
 203          */
 204         return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id );
 205 }
 206
 207 /**
 208  * Convert a fraction string to a decimal.
 209  *
 210  * @since 2.5.0
 211  *
 212  * @param string $str
 213  * @return int|float
 214  */
 215 function wp_exif_frac2dec($str) {
 216         @list( $n, $d ) = explode( '/', $str );
 217         if ( !empty($d) )
 218                 return $n / $d;
 219         return $str;
 220 }
 221
 222 /**
 223  * Convert the exif date format to a unix timestamp.
 224  *
 225  * @since 2.5.0
 226  *
 227  * @param string $str
 228  * @return int
 229  */
 230 function wp_exif_date2ts($str) {
 231         @list( $date, $time ) = explode( ' ', trim($str) );
 232         @list( $y, $m, $d ) = explode( ':', $date );
 233
 234         return strtotime( "{$y}-{$m}-{$d} {$time}" );
 235 }
 236
 237 /**
 238  * Get extended image metadata, exif or iptc as available.
 239  *
 240  * Retrieves the EXIF metadata aperture, credit, camera, caption, copyright, iso
 241  * created_timestamp, focal_length, shutter_speed, and title.
 242  *
 243  * The IPTC metadata that is retrieved is APP13, credit, byline, created date
 244  * and time, caption, copyright, and title. Also includes FNumber, Model,
 245  * DateTimeDigitized, FocalLength, ISOSpeedRatings, and ExposureTime.
 246  *
 247  * @todo Try other exif libraries if available.
 248  * @since 2.5.0
 249  *
 250  * @param string $file
 251  * @return bool|array False on failure. Image metadata array on success.
 252  */
 253 function wp_read_image_metadata( $file ) {
 254         if ( ! file_exists( $file ) )
 255                 return false;
 256
 257         list( , , $sourceImageType ) = getimagesize( $file );
 258
 259         /*
 260          * EXIF contains a bunch of data we'll probably never need formatted in ways
 261          * that are difficult to use. We'll normalize it and just extract the fields
 262          * that are likely to be useful. Fractions and numbers are converted to
 263          * floats, dates to unix timestamps, and everything else to strings.
 264          */
 265         $meta = array(
 266                 'aperture' => 0,
 267                 'credit' => '',
 268                 'camera' => '',
 269                 'caption' => '',
 270                 'created_timestamp' => 0,
 271                 'copyright' => '',
 272                 'focal_length' => 0,
 273                 'iso' => 0,
 274                 'shutter_speed' => 0,
 275                 'title' => '',
 276                 'orientation' => 0,
 277         );
 278
 279         /*
 280          * Read IPTC first, since it might contain data not available in exif such
 281          * as caption, description etc.
 282          */
 283         if ( is_callable( 'iptcparse' ) ) {
 284                 getimagesize( $file, $info );
 285
 286                 if ( ! empty( $info['APP13'] ) ) {
 287                         $iptc = iptcparse( $info['APP13'] );
 288
 289                         // Headline, "A brief synopsis of the caption."
 290                         if ( ! empty( $iptc['2#105'][0] ) ) {
 291                                 $meta['title'] = trim( $iptc['2#105'][0] );
 292                         /*
 293                          * Title, "Many use the Title field to store the filename of the image,
 294                          * though the field may be used in many ways."
 295                          */
 296                         } elseif ( ! empty( $iptc['2#005'][0] ) ) {
 297                                 $meta['title'] = trim( $iptc['2#005'][0] );
 298                         }
 299
 300                         if ( ! empty( $iptc['2#120'][0] ) ) { // description / legacy caption
 301                                 $caption = trim( $iptc['2#120'][0] );
 302                                 if ( empty( $meta['title'] ) ) {
 303                                         mbstring_binary_safe_encoding();
 304                                         $caption_length = strlen( $caption );
 305                                         reset_mbstring_encoding();
 306
 307                                         // Assume the title is stored in 2:120 if it's short.
 308                                         if ( $caption_length < 80 ) {
 309                                                 $meta['title'] = $caption;
 310                                         } else {
 311                                                 $meta['caption'] = $caption;
 312                                         }
 313                                 } elseif ( $caption != $meta['title'] ) {
 314                                         $meta['caption'] = $caption;
 315                                 }
 316                         }
 317
 318                         if ( ! empty( $iptc['2#110'][0] ) ) // credit
 319                                 $meta['credit'] = trim( $iptc['2#110'][0] );
 320                         elseif ( ! empty( $iptc['2#080'][0] ) ) // creator / legacy byline
 321                                 $meta['credit'] = trim( $iptc['2#080'][0] );
 322
 323                         if ( ! empty( $iptc['2#055'][0] ) and ! empty( $iptc['2#060'][0] ) ) // created date and time
 324                                 $meta['created_timestamp'] = strtotime( $iptc['2#055'][0] . ' ' . $iptc['2#060'][0] );
 325
 326                         if ( ! empty( $iptc['2#116'][0] ) ) // copyright
 327                                 $meta['copyright'] = trim( $iptc['2#116'][0] );
 328                  }
 329         }
 330
 331         /**
 332          * Filter the image types to check for exif data.
 333          *
 334          * @since 2.5.0
 335          *
 336          * @param array $image_types Image types to check for exif data.
 337          */
 338         if ( is_callable( 'exif_read_data' ) && in_array( $sourceImageType, apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ) ) ) {
 339                 $exif = @exif_read_data( $file );
 340
 341                 if ( empty( $meta['title'] ) && ! empty( $exif['Title'] ) ) {
 342                         $meta['title'] = trim( $exif['Title'] );
 343                 }
 344
 345                 if ( ! empty( $exif['ImageDescription'] ) ) {
 346                         mbstring_binary_safe_encoding();
 347                         $description_length = strlen( $exif['ImageDescription'] );
 348                         reset_mbstring_encoding();
 349
 350                         if ( empty( $meta['title'] ) && $description_length < 80 ) {
 351                                 // Assume the title is stored in ImageDescription
 352                                 $meta['title'] = trim( $exif['ImageDescription'] );
 353                                 if ( empty( $meta['caption'] ) && ! empty( $exif['COMPUTED']['UserComment'] ) && trim( $exif['COMPUTED']['UserComment'] ) != $meta['title'] ) {
 354                                         $meta['caption'] = trim( $exif['COMPUTED']['UserComment'] );
 355                                 }
 356                         } elseif ( empty( $meta['caption'] ) && trim( $exif['ImageDescription'] ) != $meta['title'] ) {
 357                                 $meta['caption'] = trim( $exif['ImageDescription'] );
 358                         }
 359                 } elseif ( empty( $meta['caption'] ) && ! empty( $exif['Comments'] ) && trim( $exif['Comments'] ) != $meta['title'] ) {
 360                         $meta['caption'] = trim( $exif['Comments'] );
 361                 }
 362
 363                 if ( empty( $meta['credit'] ) ) {
 364                         if ( ! empty( $exif['Artist'] ) ) {
 365                                 $meta['credit'] = trim( $exif['Artist'] );
 366                         } elseif ( ! empty($exif['Author'] ) ) {
 367                                 $meta['credit'] = trim( $exif['Author'] );
 368                         }
 369                 }
 370
 371                 if ( empty( $meta['copyright'] ) && ! empty( $exif['Copyright'] ) ) {
 372                         $meta['copyright'] = trim( $exif['Copyright'] );
 373                 }
 374                 if ( ! empty( $exif['FNumber'] ) ) {
 375                         $meta['aperture'] = round( wp_exif_frac2dec( $exif['FNumber'] ), 2 );
 376                 }
 377                 if ( ! empty( $exif['Model'] ) ) {
 378                         $meta['camera'] = trim( $exif['Model'] );
 379                 }
 380                 if ( empty( $meta['created_timestamp'] ) && ! empty( $exif['DateTimeDigitized'] ) ) {
 381                         $meta['created_timestamp'] = wp_exif_date2ts( $exif['DateTimeDigitized'] );
 382                 }
 383                 if ( ! empty( $exif['FocalLength'] ) ) {
 384                         $meta['focal_length'] = (string) wp_exif_frac2dec( $exif['FocalLength'] );
 385                 }
 386                 if ( ! empty( $exif['ISOSpeedRatings'] ) ) {
 387                         $meta['iso'] = is_array( $exif['ISOSpeedRatings'] ) ? reset( $exif['ISOSpeedRatings'] ) : $exif['ISOSpeedRatings'];
 388                         $meta['iso'] = trim( $meta['iso'] );
 389                 }
 390                 if ( ! empty( $exif['ExposureTime'] ) ) {
 391                         $meta['shutter_speed'] = (string) wp_exif_frac2dec( $exif['ExposureTime'] );
 392                 }
 393                 if ( ! empty( $exif['Orientation'] ) ) {
 394                         $meta['orientation'] = $exif['Orientation'];
 395                 }
 396         }
 397
 398         foreach ( array( 'title', 'caption', 'credit', 'copyright', 'camera', 'iso' ) as $key ) {
 399                 if ( $meta[ $key ] && ! seems_utf8( $meta[ $key ] ) ) {
 400                         $meta[ $key ] = utf8_encode( $meta[ $key ] );
 401                 }
 402         }
 403
 404         /**
 405          * Filter the array of meta data read from an image's exif data.
 406          *
 407          * @since 2.5.0
 408          *
 409          * @param array  $meta            Image meta data.
 410          * @param string $file            Path to image file.
 411          * @param int    $sourceImageType Type of image.
 412          */
 413         return apply_filters( 'wp_read_image_metadata', $meta, $file, $sourceImageType );
 414
 415 }
 416
 417 /**
 418  * Validate that file is an image.
 419  *
 420  * @since 2.5.0
 421  *
 422  * @param string $path File path to test if valid image.
 423  * @return bool True if valid image, false if not valid image.
 424  */
 425 function file_is_valid_image($path) {
 426         $size = @getimagesize($path);
 427         return !empty($size);
 428 }
 429
 430 /**
 431  * Validate that file is suitable for displaying within a web page.
 432  *
 433  * @since 2.5.0
 434  *
 435  * @param string $path File path to test.
 436  * @return bool True if suitable, false if not suitable.
 437  */
 438 function file_is_displayable_image($path) {
 439         $displayable_image_types = array( IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_BMP );
 440
 441         $info = @getimagesize( $path );
 442         if ( empty( $info ) ) {
 443                 $result = false;
 444         } elseif ( ! in_array( $info[2], $displayable_image_types ) ) {
 445                 $result = false;
 446         } else {
 447                 $result = true;
 448         }
 449
 450         /**
 451          * Filter whether the current image is displayable in the browser.
 452          *
 453          * @since 2.5.0
 454          *
 455          * @param bool   $result Whether the image can be displayed. Default true.
 456          * @param string $path   Path to the image.
 457          */
 458         return apply_filters( 'file_is_displayable_image', $result, $path );
 459 }
 460
 461 /**
 462  * Load an image resource for editing.
 463  *
 464  * @since 2.9.0
 465  *
 466  * @param string $attachment_id Attachment ID.
 467  * @param string $mime_type Image mime type.
 468  * @param string $size Optional. Image size, defaults to 'full'.
 469  * @return resource|false The resulting image resource on success, false on failure.
 470  */
 471 function load_image_to_edit( $attachment_id, $mime_type, $size = 'full' ) {
 472         $filepath = _load_image_to_edit_path( $attachment_id, $size );
 473         if ( empty( $filepath ) )
 474                 return false;
 475
 476         switch ( $mime_type ) {
 477                 case 'image/jpeg':
 478                         $image = imagecreatefromjpeg($filepath);
 479                         break;
 480                 case 'image/png':
 481                         $image = imagecreatefrompng($filepath);
 482                         break;
 483                 case 'image/gif':
 484                         $image = imagecreatefromgif($filepath);
 485                         break;
 486                 default:
 487                         $image = false;
 488                         break;
 489         }
 490         if ( is_resource($image) ) {
 491                 /**
 492                  * Filter the current image being loaded for editing.
 493                  *
 494                  * @since 2.9.0
 495                  *
 496                  * @param resource $image         Current image.
 497                  * @param string   $attachment_id Attachment ID.
 498                  * @param string   $size          Image size.
 499                  */
 500                 $image = apply_filters( 'load_image_to_edit', $image, $attachment_id, $size );
 501                 if ( function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
 502                         imagealphablending($image, false);
 503                         imagesavealpha($image, true);
 504                 }
 505         }
 506         return $image;
 507 }
 508
 509 /**
 510  * Retrieve the path or url of an attachment's attached file.
 511  *
 512  * If the attached file is not present on the local filesystem (usually due to replication plugins),
 513  * then the url of the file is returned if url fopen is supported.
 514  *
 515  * @since 3.4.0
 516  * @access private
 517  *
 518  * @param string $attachment_id Attachment ID.
 519  * @param string $size Optional. Image size, defaults to 'full'.
 520  * @return string|false File path or url on success, false on failure.
 521  */
 522 function _load_image_to_edit_path( $attachment_id, $size = 'full' ) {
 523         $filepath = get_attached_file( $attachment_id );
 524
 525         if ( $filepath && file_exists( $filepath ) ) {
 526                 if ( 'full' != $size && ( $data = image_get_intermediate_size( $attachment_id, $size ) ) ) {
 527                         /**
 528                          * Filter the path to the current image.
 529                          *
 530                          * The filter is evaluated for all image sizes except 'full'.
 531                          *
 532                          * @since 3.1.0
 533                          *
 534                          * @param string $path          Path to the current image.
 535                          * @param string $attachment_id Attachment ID.
 536                          * @param string $size          Size of the image.
 537                          */
 538                         $filepath = apply_filters( 'load_image_to_edit_filesystempath', path_join( dirname( $filepath ), $data['file'] ), $attachment_id, $size );
 539                 }
 540         } elseif ( function_exists( 'fopen' ) && function_exists( 'ini_get' ) && true == ini_get( 'allow_url_fopen' ) ) {
 541                 /**
 542                  * Filter the image URL if not in the local filesystem.
 543                  *
 544                  * The filter is only evaluated if fopen is enabled on the server.
 545                  *
 546                  * @since 3.1.0
 547                  *
 548                  * @param string $image_url     Current image URL.
 549                  * @param string $attachment_id Attachment ID.
 550                  * @param string $size          Size of the image.
 551                  */
 552                 $filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size );
 553         }
 554
 555         /**
 556          * Filter the returned path or URL of the current image.
 557          *
 558          * @since 2.9.0
 559          *
 560          * @param string|bool $filepath      File path or URL to current image, or false.
 561          * @param string      $attachment_id Attachment ID.
 562          * @param string      $size          Size of the image.
 563          */
 564         return apply_filters( 'load_image_to_edit_path', $filepath, $attachment_id, $size );
 565 }
 566
 567 /**
 568  * Copy an existing image file.
 569  *
 570  * @since 3.4.0
 571  * @access private
 572  *
 573  * @param string $attachment_id Attachment ID.
 574  * @return string|false New file path on success, false on failure.
 575  */
 576 function _copy_image_file( $attachment_id ) {
 577         $dst_file = $src_file = get_attached_file( $attachment_id );
 578         if ( ! file_exists( $src_file ) )
 579                 $src_file = _load_image_to_edit_path( $attachment_id );
 580
 581         if ( $src_file ) {
 582                 $dst_file = str_replace( basename( $dst_file ), 'copy-' . basename( $dst_file ), $dst_file );
 583                 $dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), basename( $dst_file ) );
 584
 585                 /*
 586                  * The directory containing the original file may no longer
 587                  * exist when using a replication plugin.
 588                  */
 589                 wp_mkdir_p( dirname( $dst_file ) );
 590
 591                 if ( ! @copy( $src_file, $dst_file ) )
 592                         $dst_file = false;
 593         } else {
 594                 $dst_file = false;
 595         }
 596
 597         return $dst_file;
 598 }