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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 |
---|---|
3494 | function wp_filesize( $path ) { |
3495 | /** |
3496 | * Filters the result of wp_filesize before the PHP function is run. |
3497 | * |
3498 | * @since 6.0.0 |
3499 | * |
3500 | * @param null|int $size The unfiltered value. Returning an int from the callback bypasses the filesize call. |
3501 | * @param string $path Path to the file. |
3502 | */ |
3503 | $size = apply_filters( 'pre_wp_filesize', null, $path ); |
3504 |
|
3505 | if ( is_int( $size ) ) { |
3506 | return $size; |
3507 | } |
3508 |
|
3509 | $size = file_exists( $path ) ? (int) filesize( $path ) : 0; |
3510 |
|
3511 | /** |
3512 | * Filters the size of the file. |