a fast way to get array value by key.

get-arr-val.php

<?php
/**
 * 快速获取数据的值
 * @param $soure
 * @param $key
 * @param string $separetor
 * @return array|null
 * @throws Exception
 */
function _v($soure, $key, $separetor = '.') {
    if(empty($key) || !is_array($soure)) {
        return $soure;
    }

    $_key = explode($separetor, $key);
    $nested = 100;
    $obj = $soure;
    while(true) {
        $nested --;
        if($nested == 0) {
            throw new Exception("数组维数太大了！！！");
        }

        if(count($_key) > 0) {
            $_k = array_shift($_key);
            if(isset($obj[$_k])) {
                $obj = $obj[$_k];
            } else {
                return null;
            }
        } else {
            break;
        }
    }

    return $obj;
}