[php] php结合算法

[php] php组合算法

<?phpfunction combination() {    $array = array();    $arguments = func_get_args();    foreach ($arguments as $argument) {        if (is_array($argument) === true) {            $array[] = $argument;        } else {            $array[] = array($argument);        }    }    $size = count($array);    if ($size === 0) {        return array();    } else if ($size === 1) {        return is_array($array[0]) === true ? $array[0] : array();    } else {        $result = array();        $a = $array[0];        array_shift($array);        if (is_array($array) === false) {            return $result;        }        foreach ($a as $val) {            $b = call_user_func_array("combination", $array);            foreach ($b as $c) {                if (is_array($c) === true) {                    $result[] = array_merge(array($val), $c);                } else {                    $result[] = array($val, $c);                }            }        }        return $result;    }}echo '<pre class="brush:php;toolbar:false">';print_r(combination(array("A1", "A2"), array("B1", "B2"), "1", array("C1", "C2", "C3")));?>  

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