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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 |
|---|---|
| 158 | |
| 159 | /** |
| 160 | * Filters the media widget instance schema to add additional properties. |
| 161 | * |
| 162 | * @since 4.9.0 |
| 163 | * |
| 164 | * @param array $schema Instance schema. |
| 165 | * @param WP_Widget_Media $this Widget object. |
| 166 | */ |
| 167 | $schema = apply_filters( "widget_{$this->id_base}_instance_schema", $schema, $this ); |
| 168 | |
| 169 | return $schema; |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Determine if the supplied attachment is for a valid attachment post with the specified MIME type. |
| 174 | * |
| 175 | * @since 4.8.0 |
| 176 | * |