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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
---|---|
4165 | $fp = fopen( $file, 'r' ); |
4166 |
|
4167 | // Pull only the first 8kiB of the file in. |
4168 | $file_data = fread( $fp, 8192 ); |
4169 |
|
4170 | // PHP will close file handle, but we are good citizens. |
4171 | fclose( $fp ); |
4172 |
|
4173 | if ( $context != '' ) { |
4174 | $extra_headers = apply_filters( "extra_$context".'_headers', array() ); |
4175 |
|
4176 | $extra_headers = array_flip( $extra_headers ); |
4177 | foreach( $extra_headers as $key=>$value ) { |
4178 | $extra_headers[$key] = $key; |
4179 | } |
4180 | $all_headers = array_merge($extra_headers, $default_headers); |
4181 | } else { |
4182 | $all_headers = $default_headers; |
4183 | } |