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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 |
|---|---|
| 2341 | * |
| 2342 | * @since 2.8.0 |
| 2343 | * |
| 2344 | * @param string $text |
| 2345 | * @return string |
| 2346 | */ |
| 2347 | function esc_attr( $text ) { |
| 2348 | $safe_text = wp_check_invalid_utf8( $text ); |
| 2349 | $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES ); |
| 2350 | return apply_filters( 'attribute_escape', $safe_text, $text ); |
| 2351 | } |
| 2352 | |
| 2353 | /** |
| 2354 | * Escaping for textarea values. |
| 2355 | * |
| 2356 | * @since 3.1 |
| 2357 | * |
| 2358 | * @param string $text |
| 2359 | * @return string |