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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 |
---|---|
335 | /** |
336 | * Filters default mime type prior to getting the file extension. |
337 | * |
338 | * @see wp_get_mime_types() |
339 | * |
340 | * @since 3.5.0 |
341 | * |
342 | * @param string $mime_type Mime type string. |
343 | */ |
344 | $mime_type = apply_filters( 'image_editor_default_mime_type', $this->default_mime_type ); |
345 | $new_ext = $this->get_extension( $mime_type ); |
346 | } |
347 |
|
348 | if ( $filename ) { |
349 | $dir = pathinfo( $filename, PATHINFO_DIRNAME ); |
350 | $ext = pathinfo( $filename, PATHINFO_EXTENSION ); |
351 |
|
352 | $filename = trailingslashit( $dir ) . wp_basename( $filename, ".$ext" ) . ".{$new_ext}"; |
353 | } |