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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 |
---|---|
1434 | if ( false !== strpos($field, 'post_') ) { |
1435 | $prefixed = true; |
1436 | $field_no_prefix = str_replace('post_', '', $field); |
1437 | } |
1438 |
|
1439 | if ( 'edit' == $context ) { |
1440 | $format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password'); |
1441 |
|
1442 | if ( $prefixed ) { |
1443 | $value = apply_filters("edit_$field", $value, $post_id); |
1444 | // Old school |
1445 | $value = apply_filters("${field_no_prefix}_edit_pre", $value, $post_id); |
1446 | } else { |
1447 | $value = apply_filters("edit_post_$field", $value, $post_id); |
1448 | } |
1449 |
|
1450 | if ( in_array($field, $format_to_edit) ) { |
1451 | if ( 'post_content' == $field ) |
1452 | $value = format_to_edit($value, user_can_richedit()); |