dump() 把数组以数组格式数组，有益于调试

function dump($vars, $label = '', $return = false){

if (ini_get('html_errors')) {

$content = "<pre>n";

if ($label != '') {

$content .= "<strong>{$label} :</strong>n";

}

$content .= htmlspecialchars(print_r($vars, true));

$content .= "n</pre>n";

} else {

$content = $label . " :n" . print_r($vars, true);

}

if ($return) { return $content; }

echo $content;

return null;

}

array_remove_empty()去除数组中为空的元素

function array_remove_empty(& $arr, $trim = true){

foreach ($arr as $key => $value) {

if (is_array($value)) {

array_remove_empty($arr[$key]);

} else {

$value = trim($value);

if ($value == '') {

unset($arr[$key]);

} elseif ($trim) {

$arr[$key] = $value;

}

}

}

}

array_chunk() php默认函数 作用是把函数平均分组