get_intermediate_image_sizes() │ WP 3.0.0

Gets the available intermediate image sizes.

Used By: wp_generate_attachment_metadata()
1 time — 0.000018 sec (very fast) | 50000 times — 0.14 sec (very fast) | PHP 7.0.5, WP 4.5.2
Hooks from the function

Return

String[]. An array of image size names.

Usage

get_intermediate_image_sizes();

Changelog

Since 3.0.0 Introduced.

Code of get_intermediate_image_sizes() WP 6.0

wp-includes/media.php 
function get_intermediate_image_sizes() {
	$default_sizes    = array( 'thumbnail', 'medium', 'medium_large', 'large' );
	$additional_sizes = wp_get_additional_image_sizes();

	if ( ! empty( $additional_sizes ) ) {
		$default_sizes = array_merge( $default_sizes, array_keys( $additional_sizes ) );
	}

	/**
	 * Filters the list of intermediate image sizes.
	 *
	 * @since 2.5.0
	 *
	 * @param string[] $default_sizes An array of intermediate image size names. Defaults
	 *                                are 'thumbnail', 'medium', 'medium_large', 'large'.
	 */
	return apply_filters( 'intermediate_image_sizes', $default_sizes );
}

Thumbnail (images)

Thumbnails