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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 |
|---|---|
| 1084 | |
| 1085 | /** |
| 1086 | * Filters the name of the primary column for the current list table. |
| 1087 | * |
| 1088 | * @since 4.3.0 |
| 1089 | * |
| 1090 | * @param string $default Column name default for the specific list table, e.g. 'name'. |
| 1091 | * @param string $context Screen ID for specific list table, e.g. 'plugins'. |
| 1092 | */ |
| 1093 | $column = apply_filters( 'list_table_primary_column', $default, $this->screen->id ); |
| 1094 | |
| 1095 | if ( empty( $column ) || ! isset( $columns[ $column ] ) ) { |
| 1096 | $column = $default; |
| 1097 | } |
| 1098 | |
| 1099 | return $column; |
| 1100 | } |
| 1101 | |
| 1102 | /** |