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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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195 |
|
196 | /** |
197 | * Filter the generated attachment meta data. |
198 | * |
199 | * @since 2.1.0 |
200 | * |
201 | * @param array $metadata An array of attachment meta data. |
202 | * @param int $attachment_id Current attachment ID. |
203 | */ |
204 | return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id ); |
205 | } |
206 |
|
207 | /** |
208 | * Convert a fraction string to a decimal. |
209 | * |
210 | * @since 2.5.0 |
211 | * |
212 | * @param string $str |
213 | * @return int|float |