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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 |
|---|---|
| 536 | * @return mixed WP_Error on failure, True on success |
| 537 | */ |
| 538 | function unzip_file($file, $to) { |
| 539 | global $wp_filesystem; |
| 540 | |
| 541 | if ( ! $wp_filesystem || !is_object($wp_filesystem) ) |
| 542 | return new WP_Error('fs_unavailable', __('Could not access filesystem.')); |
| 543 | |
| 544 | // Unzip can use a lot of memory, but not this much hopefully |
| 545 | @ini_set( 'memory_limit', apply_filters( 'admin_memory_limit', WP_MAX_MEMORY_LIMIT ) ); |
| 546 | |
| 547 | $needed_dirs = array(); |
| 548 | $to = trailingslashit($to); |
| 549 | |
| 550 | // Determine any parent dir's needed (of the upgrade directory) |
| 551 | if ( ! $wp_filesystem->is_dir($to) ) { //Only do parents if no children exist |
| 552 | $path = preg_split('![/\\\]!', untrailingslashit($to)); |
| 553 | for ( $i = count($path); $i >= 0; $i-- ) { |
| 554 | if ( empty($path[$i]) ) |