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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 |
|---|---|
| 1073 | /** |
| 1074 | * Filters the maximum error response body size in `download_url()`. |
| 1075 | * |
| 1076 | * @since 5.1.0 |
| 1077 | * |
| 1078 | * @see download_url() |
| 1079 | * |
| 1080 | * @param int $size The maximum error response body size. Default 1 KB. |
| 1081 | */ |
| 1082 | $response_size = apply_filters( 'download_url_error_max_body_size', KB_IN_BYTES ); |
| 1083 | $data['body'] = fread( $tmpf, $response_size ); |
| 1084 | fclose( $tmpf ); |
| 1085 | } |
| 1086 | |
| 1087 | unlink( $tmpfname ); |
| 1088 | return new WP_Error( 'http_404', trim( wp_remote_retrieve_response_message( $response ) ), $data ); |
| 1089 | } |
| 1090 | |
| 1091 | $content_md5 = wp_remote_retrieve_header( $response, 'content-md5' ); |