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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 |
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2305 | * @since 3.0.0 |
2306 | * |
2307 | * @param array $wp_check_filetype_and_ext File data array containing 'ext', 'type', and |
2308 | * 'proper_filename' keys. |
2309 | * @param string $file Full path to the file. |
2310 | * @param string $filename The name of the file (may differ from $file due to |
2311 | * $file being in a tmp directory). |
2312 | * @param array $mimes Key is the file extension with value as the mime type. |
2313 | */ |
2314 | return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes ); |
2315 | } |
2316 |
|
2317 | /** |
2318 | * Retrieve list of mime types and file extensions. |
2319 | * |
2320 | * @since 3.5.0 |
2321 | * @since 4.2.0 Support was added for GIMP (xcf) files. |
2322 | * |
2323 | * @return array Array of mime types keyed by the file extension regex corresponding to those types. |