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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 |
|---|---|
| 2904 | * Filter text before named entities are converted into numbered entities. |
| 2905 | * |
| 2906 | * A non-null string must be returned for the filter to be evaluated. |
| 2907 | * |
| 2908 | * @since 3.3.0 |
| 2909 | * |
| 2910 | * @param null $converted_text The text to be converted. Default null. |
| 2911 | * @param string $text The text prior to entity conversion. |
| 2912 | */ |
| 2913 | $filtered = apply_filters( 'pre_ent2ncr', null, $text ); |
| 2914 | if ( null !== $filtered ) |
| 2915 | return $filtered; |
| 2916 | |
| 2917 | $to_ncr = array( |
| 2918 | '"' => '"', |
| 2919 | '&' => '&', |
| 2920 | '<' => '<', |
| 2921 | '>' => '>', |
| 2922 | '|' => '|', |