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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 |
---|---|
1452 | $value = format_to_edit($value, user_can_richedit()); |
1453 | else |
1454 | $value = format_to_edit($value); |
1455 | } else { |
1456 | $value = esc_attr($value); |
1457 | } |
1458 | } else if ( 'db' == $context ) { |
1459 | if ( $prefixed ) { |
1460 | $value = apply_filters("pre_$field", $value); |
1461 | $value = apply_filters("${field_no_prefix}_save_pre", $value); |
1462 | } else { |
1463 | $value = apply_filters("pre_post_$field", $value); |
1464 | $value = apply_filters("${field}_pre", $value); |
1465 | } |
1466 | } else { |
1467 | // Use display filters by default. |
1468 | if ( $prefixed ) |
1469 | $value = apply_filters($field, $value, $post_id, $context); |
1470 | else |