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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 |
|---|---|
| 3535 | function wp_filesize( $path ) { |
| 3536 | /** |
| 3537 | * Filters the result of wp_filesize before the PHP function is run. |
| 3538 | * |
| 3539 | * @since 6.0.0 |
| 3540 | * |
| 3541 | * @param null|int $size The unfiltered value. Returning an int from the callback bypasses the filesize call. |
| 3542 | * @param string $path Path to the file. |
| 3543 | */ |
| 3544 | $size = apply_filters( 'pre_wp_filesize', null, $path ); |
| 3545 | |
| 3546 | if ( is_int( $size ) ) { |
| 3547 | return $size; |
| 3548 | } |
| 3549 | |
| 3550 | $size = file_exists( $path ) ? (int) filesize( $path ) : 0; |
| 3551 | |
| 3552 | /** |
| 3553 | * Filters the size of the file. |