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Home Backend Development PHP Tutorial $count为什么输出为0!指教解决思路

$count为什么输出为0!指教解决思路

Jun 13, 2016 am 10:11 AM
count data post quot

$count为什么输出为0!!指教
public function train_insert(){
$pxda =M("pxda");
$data = array();
$count = count($RYMC_ID);
print_r($count);exit;
$Number = $pxda->query('select max(to_number(ID)) as ID from __TABLE__');
foreach($Number as $key=>$val){
$MaxNumber = $val['ID'];

}
$id = $MaxNumber + 1;
$data['ID'] = $id;
$data['SWJG_DM'] = $_POST['SWJG_DM'];//录入单位代码
$data['RYMC_ID'] = $_POST['RYMC_ID2'];//人员名称id
$data['SCORE'] = $_POST['SCORE'];//成绩
$data['REMARK'] = $_POST['REMARK'];//备注
$data['TIME'] = $_POST['TIME'];//添加时间
$data['PXDD'] = $_POST['PXDD']; //培训地点
$data['CLASS_ID'] = $_POST['CLASS_ID'];//类别id
$data['JCQK'] = $_POST['JCQK'];//奖惩情况
$data['BZWH'] = $_POST['BZWH']; //文号
$data['ZUTI_ID'] = $_POST['ZUTI_ID'];//主题id
$data['PXDW'] = $_POST['PXDW'];//培训单位
$data['START_TIME'] = $_POST['START_TIME'];//开始时间
$data['END_TIME'] = $_POST['END_TIME'];//结束时间
$data['ZZDW'] = $_POST['ZZDW'];//组织单位
$result = $pxda->add($data);
if ($result !== false) {
$this->assign("jumpUrl","train");
$this->success();
$this->redirect('Honor/train');
  } else {
$this->assign("jumpUrl","train");
$this->error();
  }
}

------解决方案--------------------
我想知道 $RYMC_ID 是哪儿来的
------解决方案--------------------
public function train_insert(){
$pxda =M("pxda");
$data = array();
$count = count($RYMC_ID);
print_r($count);exit;

train_insert方法并未定义$RYMC_ID,如果全局GLOBALS或者成员变量$this->也需要你申明、指定

否则必然输出0
------解决方案--------------------
$RYMC_ID 这个变量哪里来的? 赋值了么???
------解决方案--------------------
$RYMC_ID在函数里没有出现过定义。除非是全局变量。
------解决方案--------------------
count — 计算数组中的单元数目或对象中的属性个数

说明

int count ( mixed $var [, int $mode ] )
返回 var 中的单元数目,通常是一个 array,任何其它类型都只有一个单元。

对于对象,如果安装了 SPL,可以通过实现 Countable 接口来调用 count()。该接口只有一个方法 count(),此方法返回 count() 函数的返回值。

如果 var 不是数组类型或者实现了 Countable 接口的对象,将返回 1,有一个例外,如果 var 是 NULL 则结果是 0。

Note: 可选的 mode 参数自 PHP 4.2.0 起可用。

如果可选的 mode 参数设为 COUNT_RECURSIVE(或 1),count() 将递归地对数组计数。对计算多维数组的所有单元尤其有用。mode 的默认值是 0。count() 识别不了无限递归。

Caution
count() 对没有初始化的变量返回 0,但对于空的数组也会返回 0。用 isset() 来测试变量是否已经初始化。

请参考手册中数组一节中关于怎样在 PHP 中实现和使用数组的详细解释。

Example #1 count() 例子
$a[0] = 1;
$a[1] = 3;
$a[2] = 5;
$result = count($a);
// $result == 3

$b[0] = 7;
$b[5] = 9;
$b[10] = 11;
$result = count($b);
// $result == 3;

$result = count(null);
// $result == 0

$result = count(false);
// $result == 1
?>
Example #2 count() 的递归例子(PHP >= 4.2.0)
$food = array('fruits' => array('orange', 'banana', 'apple'),
'veggie' => array('carrot', 'collard','pea'));

// recursive count
echo count($food, COUNT_RECURSIVE); // output 8

// normal count
echo count($food); // output 2
?>
参见 is_array(),isset() 和 strlen()。
------解决方案--------------------
刚才已经解决了,是你post过来的参数 没有接受到。

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