php array_merge 多数组合并

<?php
function arrayMerge()
{
    $arrays = func_get_args();
    
    $mergeArr = [];
    
    foreach($arrays as $arr){
        if (is_array($arr)) {
        foreach($arr as $val) {
            $mergeArr[] = $val;
        }
        }
    }
    
    return $mergeArr;
}
 
var_dump(arrayMerge([‘a‘], [‘b‘, ‘c‘], [‘d‘, ‘e‘, ‘f‘]));