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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 |
---|---|
3596 | function wp_filesize( $path ) { |
3597 | /** |
3598 | * Filters the result of wp_filesize before the PHP function is run. |
3599 | * |
3600 | * @since 6.0.0 |
3601 | * |
3602 | * @param null|int $size The unfiltered value. Returning an int from the callback bypasses the filesize call. |
3603 | * @param string $path Path to the file. |
3604 | */ |
3605 | $size = apply_filters( 'pre_wp_filesize', null, $path ); |
3606 |
|
3607 | if ( is_int( $size ) ) { |
3608 | return $size; |
3609 | } |
3610 |
|
3611 | $size = file_exists( $path ) ? (int) filesize( $path ) : 0; |
3612 |
|
3613 | /** |
3614 | * Filters the size of the file. |