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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 |
|---|---|
| 2552 | * @since 2.5.0 |
| 2553 | * |
| 2554 | * @param string $output The text to be formatted. |
| 2555 | * @return string Formatted text after filter applied. |
| 2556 | */ |
| 2557 | function wp_htmledit_pre($output) { |
| 2558 | if ( !empty($output) ) |
| 2559 | $output = htmlspecialchars($output, ENT_NOQUOTES, get_option( 'blog_charset' ) ); // convert only < > & |
| 2560 | |
| 2561 | return apply_filters('htmledit_pre', $output); |
| 2562 | } |
| 2563 | |
| 2564 | /** |
| 2565 | * Perform a deep string replace operation to ensure the values in $search are no longer present |
| 2566 | * |
| 2567 | * Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values |
| 2568 | * e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that |
| 2569 | * str_replace would return |
| 2570 | * |