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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 1806 | if ( count( $parts ) <= 2 ) { |
| 1807 | /** |
| 1808 | * Filters a sanitized filename string. |
| 1809 | * |
| 1810 | * @since 2.8.0 |
| 1811 | * |
| 1812 | * @param string $filename Sanitized filename. |
| 1813 | * @param string $filename_raw The filename prior to sanitization. |
| 1814 | */ |
| 1815 | return apply_filters( 'sanitize_file_name', $filename, $filename_raw ); |
| 1816 | } |
| 1817 | |
| 1818 | // Process multiple extensions |
| 1819 | $filename = array_shift($parts); |
| 1820 | $extension = array_pop($parts); |
| 1821 | $mimes = get_allowed_mime_types(); |
| 1822 | |
| 1823 | /* |
| 1824 | * Loop over any intermediate extensions. Postfix them with a trailing underscore |
| Line | Code |
| 1836 | break; |
| 1837 | } |
| 1838 | } |
| 1839 | if ( !$allowed ) |
| 1840 | $filename .= '_'; |
| 1841 | } |
| 1842 | } |
| 1843 | $filename .= '.' . $extension; |
| 1844 | /** This filter is documented in wp-includes/formatting.php */ |
| 1845 | return apply_filters('sanitize_file_name', $filename, $filename_raw); |
| 1846 | } |
| 1847 | |
| 1848 | /** |
| 1849 | * Sanitizes a username, stripping out unsafe characters. |
| 1850 | * |
| 1851 | * Removes tags, octets, entities, and if strict is enabled, will only keep |
| 1852 | * alphanumeric, _, space, ., -, @. After sanitizing, it passes the username, |
| 1853 | * raw username (the username in the parameter), and the value of $strict as |
| 1854 | * parameters for the {@see 'sanitize_user'} filter. |