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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 |
|---|---|
| 481 | * |
| 482 | * @since 2.2.0 |
| 483 | * |
| 484 | * @param string $translation Translated text. |
| 485 | * @param string $single The text to be used if the number is singular. |
| 486 | * @param string $plural The text to be used if the number is plural. |
| 487 | * @param int $number The number to compare against to use either the singular or plural form. |
| 488 | * @param string $domain Text domain. Unique identifier for retrieving translated strings. |
| 489 | */ |
| 490 | $translation = apply_filters( 'ngettext', $translation, $single, $plural, $number, $domain ); |
| 491 | |
| 492 | /** |
| 493 | * Filters the singular or plural form of a string for a domain. |
| 494 | * |
| 495 | * The dynamic portion of the hook name, `$domain`, refers to the text domain. |
| 496 | * |
| 497 | * @since 5.5.0 |
| 498 | * |
| 499 | * @param string $translation Translated text. |