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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 |
|---|---|
| 137 | * |
| 138 | * The dynamic portion of the hook name, `$slug`, refers to the slug name |
| 139 | * for the generic template part. |
| 140 | * |
| 141 | * @since 3.0.0 |
| 142 | * |
| 143 | * @param string $slug The slug name for the generic template. |
| 144 | * @param string|null $name The name of the specialized template. |
| 145 | */ |
| 146 | do_action( "get_template_part_{$slug}", $slug, $name ); |
| 147 | |
| 148 | $templates = array(); |
| 149 | $name = (string) $name; |
| 150 | if ( '' !== $name ) |
| 151 | $templates[] = "{$slug}-{$name}.php"; |
| 152 | |
| 153 | $templates[] = "{$slug}.php"; |
| 154 | |
| 155 | locate_template($templates, true, false); |