WordPress：特定のファイルタイプをアップロード可能・不可能にする方法

function wp_get_mime_types() {
  return apply_filters( 'mime_types', array(
  // Image formats.
  'jpg|jpeg|jpe' => 'image/jpeg',
  'gif' => 'image/gif',
  'png' => 'image/png',
  'bmp' => 'image/bmp',
  'tif|tiff' => 'image/tiff',
  'ico' => 'image/x-icon',
  // Video formats.
  'asf|asx' => 'video/x-ms-asf',
  'wmv' => 'video/x-ms-wmv',
  'wmx' => 'video/x-ms-wmx',
  'wm' => 'video/x-ms-wm',
  'avi' => 'video/avi',
  'divx' => 'video/divx',
  'flv' => 'video/x-flv',
  'mov|qt' => 'video/quicktime',
  'mpeg|mpg|mpe' => 'video/mpeg',
  'mp4|m4v' => 'video/mp4',
  'ogv' => 'video/ogg',
  'webm' => 'video/webm',
  'mkv' => 'video/x-matroska',
  '3gp|3gpp' => 'video/3gpp', // Can also be audio
  '3g2|3gp2' => 'video/3gpp2', // Can also be audio
  // Text formats.
  'txt|asc|c|cc|h|srt' => 'text/plain',
  'csv' => 'text/csv',
  'tsv' => 'text/tab-separated-values',
  'ics' => 'text/calendar',
  'rtx' => 'text/richtext',
  'css' => 'text/css',
  'htm|html' => 'text/html',
  'vtt' => 'text/vtt',
  'dfxp' => 'application/ttaf+xml',
  // Audio formats.
  'mp3|m4a|m4b' => 'audio/mpeg',
  'ra|ram' => 'audio/x-realaudio',
  'wav' => 'audio/wav',
  'ogg|oga' => 'audio/ogg',
  'mid|midi' => 'audio/midi',
  'wma' => 'audio/x-ms-wma',
  'wax' => 'audio/x-ms-wax',
  'mka' => 'audio/x-matroska',
  // Misc application formats.
  'rtf' => 'application/rtf',
  'js' => 'application/javascript',
  'pdf' => 'application/pdf',
  'swf' => 'application/x-shockwave-flash',
  'class' => 'application/java',
  'tar' => 'application/x-tar',
  'zip' => 'application/zip',
  'gz|gzip' => 'application/x-gzip',
  'rar' => 'application/rar',
  '7z' => 'application/x-7z-compressed',
  'exe' => 'application/x-msdownload',
  'psd' => 'application/octet-stream',
  // MS Office formats.
  'doc' => 'application/msword',
  'pot|pps|ppt' => 'application/vnd.ms-powerpoint',
  'wri' => 'application/vnd.ms-write',
  'xla|xls|xlt|xlw' => 'application/vnd.ms-excel',
  'mdb' => 'application/vnd.ms-access',
  'mpp' => 'application/vnd.ms-project',
  'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
  'docm' => 'application/vnd.ms-word.document.macroEnabled.12',
  'dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
  'dotm' => 'application/vnd.ms-word.template.macroEnabled.12',
  'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
  'xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
  'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
  'xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
  'xltm' => 'application/vnd.ms-excel.template.macroEnabled.12',
  'xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12',
  'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
  'pptm' => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
  'ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
  'ppsm' => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
  'potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
  'potm' => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
  'ppam' => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
  'sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
  'sldm' => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
  'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote',
  'oxps' => 'application/oxps',
  'xps' => 'application/vnd.ms-xpsdocument',
  // OpenOffice formats.
  'odt' => 'application/vnd.oasis.opendocument.text',
  'odp' => 'application/vnd.oasis.opendocument.presentation',
  'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
  'odg' => 'application/vnd.oasis.opendocument.graphics',
  'odc' => 'application/vnd.oasis.opendocument.chart',
  'odb' => 'application/vnd.oasis.opendocument.database',
  'odf' => 'application/vnd.oasis.opendocument.formula',
  // WordPerfect formats.
  'wp|wpd' => 'application/wordperfect',
  // iWork formats.
  'key' => 'application/vnd.apple.keynote',
  'numbers' => 'application/vnd.apple.numbers',
  'pages' => 'application/vnd.apple.pages',
  ) );
}

function custom_mime_types( $mimes ) {
  $mimes['svg'] = 'image/svg+xml';
  return $mimes;
}
add_filter( 'upload_mimes', 'custom_mime_types' );

function custom_mime_types( $mimes ){
  unset( $mimes['psd'] );
  return $mimes;
}
add_filter( 'upload_mimes', 'custom_mime_types' );