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我想这个代码:为什么“”不是空的?
<?php
$form = $_POST['myformdata'];
class validacoes {
function validate_year($form) {
$input_datas = $form['data'];
foreach($input_datas as $val){
if($val>1930 && $val<2012){
echo "correct";
}
else
echo "bad"; //show bad bad
}
}
}
$val = new validacoes();
$data = array();
var_dump($form['data']);
try {
if (!empty($form['data'])){// why this is true ?
$data['livre'] = $val->validate_year($form);
}
else
echo "empty";
} catch (Exception $e) {
$data['livre'] = $e->getMessage();
}
echo json_encode($data);
?>
//的var_dump
var_dump($form['data']);
array
0 => string '' (length=0)
1 => string '' (length=0)
为什么功能validate_year($form)
运行没有任何输入?应该是空的,对吗?
什么是 “空” 的吗? NULL或“”?或者是其他东西? – 2011-12-13 23:17:00