php 获取数组长度几种方法
在php中获取数组长度方法很简单,php为我们提供了两个函数可以计算一维数组长度,如count,sizeof都可以直接统计数组长度哦,下面我们来看几个实例吧。
php如何获取数组的长度,使用php函数count(),或是sizeof()
例如:
代码如下 | 复制代码 |
$arr = Array('0','1','2','3','4'); // 输出 5
$arr = array('A','B','C'); echo sizeof($arr); //输出3 |
sizeof()和count()具有同样的用途,这两个函数都可以返回数组元素个数.可以得到一个常规标量变量中的元素个数,如果传递给这个函数的数组是一个空数组,或者是一个没有经过设定的变量,返回的数组元素个数就是0;
两函数功能一样,手册上讲,sizeof()是函数count()的别名。
那么多维数组长度要怎么统计呢?
大家可参考:http://www.bKjia.c0m/phper/21/32805.htm

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