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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 |
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1078 |
|
1079 | /** |
1080 | * Filters the name of the primary column for the current list table. |
1081 | * |
1082 | * @since 4.3.0 |
1083 | * |
1084 | * @param string $default Column name default for the specific list table, e.g. 'name'. |
1085 | * @param string $context Screen ID for specific list table, e.g. 'plugins'. |
1086 | */ |
1087 | $column = apply_filters( 'list_table_primary_column', $default, $this->screen->id ); |
1088 |
|
1089 | if ( empty( $column ) || ! isset( $columns[ $column ] ) ) { |
1090 | $column = $default; |
1091 | } |
1092 |
|
1093 | return $column; |
1094 | } |
1095 |
|
1096 | /** |