删除空数组元素

function removeEmptyElements(&$element)
{
    if (is_array($element)) {
        if ($key = key($element)) {
            $element[$key] = array_filter($element);
        }

        if (count($element) != count($element, COUNT_RECURSIVE)) {
            $element = array_filter(current($element), __FUNCTION__);
        }

        return $element;
    } else {
        return empty($element) ? false : $element;
    }
}

$data = array(
    'horarios' => array(),
    'grupos' => array(
        '1A' => array(
            'Juan' => array(
                'calificaciones' => array(
                    'Matematicas' => 8,
                    'Español' => 5,
                    'Ingles' => 9,
                ),
                'asistencias' => array(
                    'enero' => 20,
                    'febrero' => 10,
                    'marzo' => '',
                )
            ),
            'Damian' => array(
                'calificaciones' => array(
                    'Matematicas' => 10,
                    'Español' => '',
                    'Ingles' => 9,
                ),
                'asistencias' => array(
                    'enero' => 20,
                    'febrero' => '',
                    'marzo' => 5,
                )
            ),
        ),
        '1B' => array(
            'Mariana' => array(
                'calificaciones' => array(
                    'Matematicas' => null,
                    'Español' => 7,
                    'Ingles' => 9,
                ),
                'asistencias' => array(
                    'enero' => null,
                    'febrero' => 5,
                    'marzo' => 5,
                )
            ),
        ),
    )
);

$data = array_filter($data, 'removeEmptyElements');
var_dump($data);

¡它工作!

我必须这样做，以保持(string) 0的数组值

$url = array_filter($data, function ($value) {
  return (!empty($value) || $value === 0 || $value==='0');
});

function trim_array($Array)
{
    foreach ($Array as $value) {
        if(trim($value) === '') {
            $index = array_search($value, $Array);
            unset($Array[$index]);
        }
    }
    return $Array;
}

foreach($linksArray as $key => $link) 
{ 
    if($link === '') 
    { 
        unset($linksArray[$key]); 
    } 
} 
print_r($linksArray); 

如果你正在处理一个数值数组，并且需要在删除空元素后重新索引数组，请使用array_values函数:

array_values(array_filter($array));

另参见:PHP重索引数组?

只有一句话: 更新(感谢@suther):

$array_without_empty_values = array_filter($array);