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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.
This hook occurs 4 times in this file.
| Line | Code |
|---|---|
| 1144 | */ |
| 1145 | $block_template = apply_filters( 'pre_get_block_file_template', null, $id, $template_type ); |
| 1146 | if ( ! is_null( $block_template ) ) { |
| 1147 | return $block_template; |
| 1148 | } |
| 1149 | |
| 1150 | $parts = explode( '//', $id, 2 ); |
| 1151 | if ( count( $parts ) < 2 ) { |
| 1152 | /** This filter is documented in wp-includes/block-template-utils.php */ |
| 1153 | return apply_filters( 'get_block_file_template', null, $id, $template_type ); |
| 1154 | } |
| 1155 | list( $theme, $slug ) = $parts; |
| 1156 | |
| 1157 | if ( get_stylesheet() !== $theme ) { |
| 1158 | /** This filter is documented in wp-includes/block-template-utils.php */ |
| 1159 | return apply_filters( 'get_block_file_template', null, $id, $template_type ); |
| 1160 | } |
| 1161 | |
| 1162 | $template_file = _get_block_template_file( $template_type, $slug ); |
| 1163 | if ( null === $template_file ) { |
| 1164 | /** This filter is documented in wp-includes/block-template-utils.php */ |
| 1165 | return apply_filters( 'get_block_file_template', null, $id, $template_type ); |
| 1166 | } |
| 1167 | |
| 1168 | $block_template = _build_block_template_result_from_file( $template_file, $template_type ); |
| 1169 | |
| 1170 | /** |
| 1171 | * Filters the block template object after it has been (potentially) fetched from the theme file. |
| 1172 | * |
| 1173 | * @since 5.9.0 |
| 1174 | * |
| 1175 | * @param WP_Block_Template|null $block_template The found block template, or null if there is none. |
| 1176 | * @param string $id Template unique identifier (example: 'theme_slug//template_slug'). |
| 1177 | * @param string $template_type Template type. Either 'wp_template' or 'wp_template_part'. |
| 1178 | */ |
| 1179 | return apply_filters( 'get_block_file_template', $block_template, $id, $template_type ); |
| 1180 | } |
| 1181 | |
| 1182 | /** |
| 1183 | * Prints a block template part. |
| 1184 | * |
| 1185 | * @since 5.9.0 |
| 1186 | * |
| 1187 | * @param string $part The block template part to print. Either 'header' or 'footer'. |
| 1188 | */ |