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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 |
|---|---|
| 3375 | * Filters text before named entities are converted into numbered entities. |
| 3376 | * |
| 3377 | * A non-null string must be returned for the filter to be evaluated. |
| 3378 | * |
| 3379 | * @since 3.3.0 |
| 3380 | * |
| 3381 | * @param null $converted_text The text to be converted. Default null. |
| 3382 | * @param string $text The text prior to entity conversion. |
| 3383 | */ |
| 3384 | $filtered = apply_filters( 'pre_ent2ncr', null, $text ); |
| 3385 | if ( null !== $filtered ) |
| 3386 | return $filtered; |
| 3387 | |
| 3388 | $to_ncr = array( |
| 3389 | '"' => '"', |
| 3390 | '&' => '&', |
| 3391 | '<' => '<', |
| 3392 | '>' => '>', |
| 3393 | '|' => '|', |