组合数组和B数组,并希望结果显示在下面
EDITED
a = {
[0]=> array(2) {
["pid"]=> string(1) "1"
["val1"]=> string(1) "1"
}
[1]=> array(2) {
["pid"]=> string(2) "12"
["val1"]=> string(1) "1"
}
[2]=> array(2) {
["pid"]=> string(2) "13"
["val1"]=> string(2) "79"
}
}
b = {
[0]=> array(2) {
["pid"]=> string(1) "1"
["val2"]=> string(1) "1"
}
[1]=> array(2) {
["pid"]=> string(2) "12"
["val2"]=> string(1) "1"
}
[2]=> array(2) {
["pid"]=> string(2) "13"
["val2"]=> string(2) "79"
}
[3]=> array(2) {
["pid"]=> string(2) "61"
["val2"]=> string(1) "1"
}
[4]=> array(2) {
["pid"]=> string(2) "62"
["val2"]=> string(2) "24"
}
}
需要帮助。
答案 0 :(得分:1)
如果这是来自数据源,请查看是否可以在PHP之外执行此操作(例如,MySQL的加入)。
如果PHP是您唯一的答案,那么下面是一个解决方案。请注意,我更改了val1
和val2
的值,因此可以更加区分。
您必须拥有某种分组约束,可以通过$groupByKey
在下面的脚本中进行配置。从PID的常见情况来看,我认为这是主题密钥。
此外,如果您有两个以上的数组都遵循类似的架构(我已注释掉$c
作为示例),您只需向array_merge
添加更多参数。
我们的想法是通过使用固定密钥作为"指针来合并累积列表中的每个项目,"如果你愿意的话。
<?php
$a = array(
array('pid' => 1, 'val1' => 'alpha'),
array('pid' => 3, 'val1' => 'bravo'),
array('pid' => 4, 'val1' => 'charlie')
);
$b = array(
array('pid' => 3, 'val2' => 'delta'),
array('pid' => 5, 'val2' => 'echo'),
array('pid' => 1, 'val2' => 'foxtrot'),
array('pid' => 8, 'val2' => 'golf')
);
/*
$c = array(
array('pid' => 3, 'val3' => 'hotel'),
array('pid' => 5, 'val1' => 'india'),
array('pid' => 1, 'val3' => 'juliette'),
array('pid' => 8, 'val3' => 'kilo')
);
*/
$groupByKey = 'pid'; // this becomes the fixed key
$merged = array_merge($a,$b); // array_merge($a,$b,$c); // cumulative container of all items in every subject array
$result = array(); // the result will be stored here, e.g. a temporary "table"
foreach ( $merged as $item ) { // $merged is essentially a table of subjects and $item is each row
if ( !isset($result[$item[$groupByKey]]) ) { // if we haven't come across this key yet
$result[$item[$groupByKey]] = array(); // initialize it
}
$result[$item[$groupByKey]] = array_merge($result[$item[$groupByKey]],$item); // consolidate all the cells for this row, later duplicate keys will cause values to be replaced
}
$result = array_values($result); // normalize the result keys, for the view they should increment rather than represent the group-by subjects
var_dump($result); // let's see how we did
?>
提供:
array (size=5)
0 =>
array (size=3)
'pid' => int 1
'val1' => string 'alpha' (length=5)
'val2' => string 'foxtrot' (length=7)
1 =>
array (size=3)
'pid' => int 3
'val1' => string 'bravo' (length=5)
'val2' => string 'delta' (length=5)
2 =>
array (size=2)
'pid' => int 4
'val1' => string 'charlie' (length=7)
3 =>
array (size=2)
'pid' => int 5
'val2' => string 'echo' (length=4)
4 =>
array (size=2)
'pid' => int 8
'val2' => string 'golf' (length=4)