我有一个数组:
Array
(
[0] => Array
(
[batch_id] => 1
[seq_id] => 1
[q_id] => 2046
[a1] => 0
[a2] => 1
[a3] => 2
[a4] => 3
[a5] => 4
)
)
我需要减去a1-a5的值1
欲望结果(例如a1):
array(4) {
["w_id"]=>
string(5) "99911"
["q_id"]=>
string(4) "2046"
["c_id"]=>
string(6) "a1"
["rank"]=>
int(1) "-1"
}
我的代码如下:
$result = mysql_query("Select * from table_1");
while($cr = mysql_fetch_array($result)){
$rr_id = $cr['batch_id'].$cr['seq_id'];
$rid = '999'.$rr_id;
$q_id = $cr['q_id'];
foreach ($cr as $k => $v){
if(preg_match('{^a\d+$}',$k)){
$new_insert[] = array(
'w_id'=>$rid,
'q_id' =>$q_id,
'c_id' =>$k,
'rank'=>$v-1
);
}
}
但是,等级的结果变为
array(4) {
["w_id"]=>
string(5) "99911"
["q_id"]=>
string(4) "2046"
["c_id"]=>
string(6) "a1"
["rank"]=>
int(0)
}
无法显示等级
的值我的代码有问题吗?有人能回答我的问题非常感谢
答案 0 :(得分:2)
您可以使用:
$data = array_map(function ($v) {
foreach($v as $k => &$x) {
if (preg_match('{^a\d+$}', $k)) {
$x = $x - 1;
}
}
return $v;
}, $data);
print_r($data);
答案 1 :(得分:1)
preg_match('{^Item \d+$}',$k)
你在preg_match中有错误的模式(你要找的是'a1','a2'......不是'item 1','item 2'......),只需使用这个:
preg_match('{^a\d+$}',$k)
答案 2 :(得分:0)
只需使用循环和预减量
foreach($cr as $k=>&$v)
{
--$v['a1'];--$v['a2'];--$v['a3'];--$v['a4'];--$v['a5'];
}
print_r($cr);
答案 3 :(得分:0)
我使用$ cr作为你的数组。
$cr[] = array("batch_id"=>1, "seq_id"=>1, "q_id"=>'2046', "a1"=>1,"a2"=>1,"a3"=>1,"a4"=>1,"a5"=>1);
foreach($cr as $k=>&$v){
$v['a1'] = $v['a1'] - 1;
$v['a2'] = $v['a2'] - 1;
$v['a3'] = $v['a3'] - 1;
$v['a4'] = $v['a4'] - 1;
$v['a5'] = $v['a5'] - 1;
}
print_r($cr);