怎么求php中二维数组元素个数答:<?php arrays=array(array(1,2,3),array(1,2,3,4),1,array(1,2,3,4,5));count=0;foreach($arrays as $each){ if(is_array($each))//用is_array是否为数组 count+=count($each);else count++;} echo "元素个数:$count";?> ...
PHP如何判断用户名是否在某个数据库字段里面?答:例 先将数据库用户表读出来 读到一个二维数组中 <?php$name = "赵五";$data =array(array('id'=>'1','name'=>"张三",'sex'=>"女",'age'=>'12'),array('id'=>'2','name'=>"李四",'sex'=>"男",'age'=>'16'),array('id'=>'3','name'=>"王二",'sex'=>"...
PHP二维数组转一维数组答:其实这是一个数组转置算法,是很常用的算法,例子程序代码如下:<?php arr=array('oneid' => array ('4','5'),'id' => array ('4','5'),'Rname' => array ('商人' ,'VIP' ),'R0' => array ('30000' ,'100001' ),'R1' => array ('100000' ,'5000000' ),'chkall' =...