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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 355 | elseif ( 'image/png' == $mime_type ) { |
| 356 | // convert from full colors to index colors, like original PNG. |
| 357 | if ( function_exists('imageistruecolor') && ! imageistruecolor( $image ) ) |
| 358 | imagetruecolortopalette( $image, false, imagecolorstotal( $image ) ); |
| 359 | |
| 360 | if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename ) ) ) |
| 361 | return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
| 362 | } |
| 363 | elseif ( 'image/jpeg' == $mime_type ) { |
| 364 | if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, apply_filters( 'jpeg_quality', $this->quality, 'image_resize' ) ) ) ) |
| 365 | return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
| 366 | } |
| 367 | else { |
| 368 | return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
| 369 | } |
| 370 | |
| 371 | // Set correct file permissions |
| 372 | $stat = stat( dirname( $filename ) ); |
| 373 | $perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits |