wp_handle_upload() WP 1.0

Wrapper for _wp_handle_upload().

Passes the 'wp_handle_upload' action.

No Hooks.

Return

Array. On success, returns an associative array of file attributes. On failure, returns $overrides['upload_error_handler'](&$file, $message ) or array( 'error'=>$message ).

Usage

wp_handle_upload( &$file, $overrides, $time );

$file(array) (required)

Reference to a single element of $_FILES. Call the function once for each uploaded file.

$overrides(array/true/false)

An associative array of names=>values to override default variables.
Default: false

$time(string)

Time formatted in 'yyyy/mm'.
Default: null

Code of wp handle upload: wp-admin/includes/file.php ^{VER 5.1.1}

<?php
function wp_handle_upload( &$file, $overrides = false, $time = null ) {
	/*
	 *  $_POST['action'] must be set and its value must equal $overrides['action']
	 *  or this:
	 */
	$action = 'wp_handle_upload';
	if ( isset( $overrides['action'] ) ) {
		$action = $overrides['action'];
	}

	return _wp_handle_upload( $file, $overrides, $time, $action );
}

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From tag: upload download (file system)