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compat.php
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<?php /** * Misc. functions for backward-compatibility. */ if ( ! function_exists( 'wp_get_attachment_image_url' ) ) { /** * Get the URL of an image attachment. * * @since 4.4.0 * * @param int $attachment_id Image attachment ID. * @param string|array $size Optional. Image size to retrieve. Accepts any valid image size, or an array * of width and height values in pixels (in that order). Default 'thumbnail'. * @param bool $icon Optional. Whether the image should be treated as an icon. Default false. * @return string|false Attachment URL or false if no image is available. */ function wp_get_attachment_image_url( $attachment_id, $size = 'thumbnail', $icon = false ) { $image = wp_get_attachment_image_src( $attachment_id, $size, $icon ); return isset( $image['0'] ) ? $image['0'] : false; } }