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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 | $max_upload_size = 0; |
| 159 | if ( current_user_can( 'upload_files' ) ) { |
| 160 | $max_upload_size = wp_max_upload_size(); |
| 161 | if ( ! $max_upload_size ) { |
| 162 | $max_upload_size = 0; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | /** This filter is documented in wp-admin/includes/media.php */ |
| 167 | $image_size_names = apply_filters( |
| 168 | 'image_size_names_choose', |
| 169 | array( |
| 170 | 'thumbnail' => __( 'Thumbnail' ), |
| 171 | 'medium' => __( 'Medium' ), |
| 172 | 'large' => __( 'Large' ), |
| 173 | 'full' => __( 'Full Size' ), |
| 174 | ) |
| 175 | ); |
| 176 | |