silverstripe-fulltextsearch/code/utils/MultipleArrayIterator.php
2011-05-02 16:33:05 +12:00

45 lines
834 B
PHP

<?php
class MultipleArrayIterator implements Iterator {
protected $arrays;
protected $active;
function __construct() {
$args = func_get_args();
$this->arrays = array();
foreach ($args as $arg) {
if (is_array($arg) && count($arg)) $this->arrays[] = $arg;
}
$this->rewind();
}
function rewind() {
$this->active = $this->arrays;
if ($this->active) reset($this->active[0]);
}
function current() {
return $this->active ? current($this->active[0]) : false;
}
function key() {
return $this->active ? key($this->active[0]) : false;
}
function next() {
if (!$this->active) return;
if (next($this->active[0]) === false) {
array_shift($this->active);
if ($this->active) reset($this->active[0]);
}
}
function valid() {
return $this->active && (current($this->active[0]) !== false);
}
}