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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 |
|---|---|
| 457 | |
| 458 | if ( user_can_richedit() ) { |
| 459 | add_filter( 'the_editor_content', 'format_for_editor', 10, 2 ); |
| 460 | $default_editor = 'tinymce'; |
| 461 | } else { |
| 462 | $default_editor = 'html'; |
| 463 | } |
| 464 | |
| 465 | /** This filter is documented in wp-includes/class-wp-editor.php */ |
| 466 | $text = apply_filters( 'the_editor_content', $instance['text'], $default_editor ); |
| 467 | |
| 468 | // Reset filter addition. |
| 469 | if ( user_can_richedit() ) { |
| 470 | remove_filter( 'the_editor_content', 'format_for_editor' ); |
| 471 | } |
| 472 | |
| 473 | // Prevent premature closing of textarea in case format_for_editor() didn't apply or the_editor_content filter did a wrong thing. |
| 474 | $escaped_text = preg_replace( '#</textarea#i', '</textarea', $text ); |
| 475 | |