PHP中数组的分组 [英] grouping of array in PHP
本文介绍了PHP中数组的分组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在PHP中有一个这样的编号数组
I have an numbered array like this in PHP
原始数组:
Array
(
[i] => Array
(
[0] => Array
(
[id] => 1
[qty] => 5
)
[1] => Array
(
[id] => 2
[qty] => 5
)
[2] => Array
(
[id] => 2
[qty] => 5
)
[3] => Array
(
[id] => 1
[qty] => 5
)
[4] => Array
(
[id] => 3
[qty] => 5
)
)
)
我希望它对相同的"id"进行分组，如果有重复项，则将数量加在一起.如果"id"是键而不是编号的键，我应该能够做到.
I want it to group the same "id" and add up quantity if there are duplicates, If the "id" is the key instead of numbered keys, I should be able to do it.
我期望的结果是:
Array
(
[i] => Array
(
[0] => Array
(
[id] => 1
[qty] => 10
)
[1] => Array
(
[id] => 2
[qty] => 10
)
[2] => Array
(
[id] => 3
[qty] => 5
)
)
)
推荐答案
工作解决方案
<?php
$your_arr = array(
array('id' => 1,'qty' => 5),
array('id' => 2,'qty' => 5),
array('id' => 2222,'qty' => 5),
array('id' => 1,'qty' => 5),
array('id' => 3,'qty' => 5)
);
$new = array();
foreach ($your_array as $r){
if(!isset($new[$r['id']]))$t=0; //check the current id exist in $new if Not $t = 0;
else $t=$r['qty']; //if yes $t's value become the saved value in $new[$r['id']]
$new[$r['id']]['id'] = $r['id'];
$new[$r['id']]['qty'] = ($t+$r['qty']); // add the new value with $new[$r['id]]'s value.
}
echo "<pre>";print_r($new);
?>
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