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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 |
|---|---|
| 2414 | * |
| 2415 | * @since 2.8.0 |
| 2416 | * |
| 2417 | * @param string $text |
| 2418 | * @return string |
| 2419 | */ |
| 2420 | function esc_attr( $text ) { |
| 2421 | $safe_text = wp_check_invalid_utf8( $text ); |
| 2422 | $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES ); |
| 2423 | return apply_filters( 'attribute_escape', $safe_text, $text ); |
| 2424 | } |
| 2425 | |
| 2426 | /** |
| 2427 | * Escaping for textarea values. |
| 2428 | * |
| 2429 | * @since 3.1 |
| 2430 | * |
| 2431 | * @param string $text |
| 2432 | * @return string |