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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 |
|---|---|
| 1100 | */ |
| 1101 | $block_template = apply_filters( 'pre_get_block_file_template', null, $id, $template_type ); |
| 1102 | if ( ! is_null( $block_template ) ) { |
| 1103 | return $block_template; |
| 1104 | } |
| 1105 | |
| 1106 | $parts = explode( '//', $id, 2 ); |
| 1107 | if ( count( $parts ) < 2 ) { |
| 1108 | /** This filter is documented in wp-includes/block-template-utils.php */ |
| 1109 | return apply_filters( 'get_block_file_template', null, $id, $template_type ); |
| 1110 | } |
| 1111 | list( $theme, $slug ) = $parts; |
| 1112 | |
| 1113 | if ( wp_get_theme()->get_stylesheet() !== $theme ) { |
| 1114 | /** This filter is documented in wp-includes/block-template-utils.php */ |
| 1115 | return apply_filters( 'get_block_file_template', null, $id, $template_type ); |
| 1116 | } |
| 1117 | |
| 1118 | $template_file = _get_block_template_file( $template_type, $slug ); |
| 1119 | if ( null === $template_file ) { |
| 1120 | /** This filter is documented in wp-includes/block-template-utils.php */ |
| 1121 | return apply_filters( 'get_block_file_template', null, $id, $template_type ); |
| 1122 | } |
| 1123 | |
| 1124 | $block_template = _build_block_template_result_from_file( $template_file, $template_type ); |
| 1125 | |
| 1126 | /** |
| 1127 | * Filters the block template object after it has been (potentially) fetched from the theme file. |
| 1128 | * |
| 1129 | * @since 5.9.0 |
| 1130 | * |
| 1131 | * @param WP_Block_Template|null $block_template The found block template, or null if there is none. |
| 1132 | * @param string $id Template unique identifier (example: theme_slug//template_slug). |
| 1133 | * @param string $template_type Template type: `'wp_template'` or '`wp_template_part'`. |
| 1134 | */ |
| 1135 | return apply_filters( 'get_block_file_template', $block_template, $id, $template_type ); |
| 1136 | } |
| 1137 | |
| 1138 | /** |
| 1139 | * Prints a block template part. |
| 1140 | * |
| 1141 | * @since 5.9.0 |
| 1142 | * |
| 1143 | * @param string $part The block template part to print. Use "header" or "footer". |
| 1144 | */ |