例如有一个二维数组 $arr:
$arr = array(
array(
'review_id' =>102 ,
'url'=>'a.jpg',
),
array(
'review_id' =>102 ,
'url'=>'b.jpg',
),
array(
'review_id' =>102 ,
'url'=>'c.jpg',
),
array(
'review_id' =>103 ,
'url'=>'aa.jpg',
),
array(
'review_id' =>103 ,
'url'=>'bb.jpg',
),
array(
'review_id' =>104 ,
'url'=>'aaa.jpg',
),
array(
'review_id' =>105 ,
'url'=>null,
),
array(
'review_id' =>106 ,
'url'=>null,
),
);
现在需要把相同 review_id 的数组的 url 进行合并,形成:
Array
(
[0] => Array
(
[review_id] => 102
[url] => Array
(
[0] => a.jpg
[1] => b.jpg
[2] => c.jpg
) ) [1] => Array
(
[review_id] => 103
[url] => Array
(
[0] => aa.jpg
[1] => bb.jpg
) ) [2] => Array
(
[review_id] => 104
[url] => aaa.jpg
) [3] => Array
(
[review_id] => 105
[url] =>
) [4] => Array
(
[review_id] => 106
[url] =>
) )
===
程序:
<?php
$arr = array(
array(
'review_id' =>102 ,
'url'=>'a.jpg',
),
array(
'review_id' =>102 ,
'url'=>'b.jpg',
),
array(
'review_id' =>102 ,
'url'=>'c.jpg',
),
array(
'review_id' =>103 ,
'url'=>'aa.jpg',
),
array(
'review_id' =>103 ,
'url'=>'bb.jpg',
),
array(
'review_id' =>104 ,
'url'=>'aaa.jpg',
),
array(
'review_id' =>105 ,
'url'=>null,
),
array(
'review_id' =>106 ,
'url'=>null,
),
); $res = array();
foreach($arr as $item) {
if(! isset($res[$item['review_id']])){
$res[$item['review_id']] = $item;
}else{
$res[$item['review_id']]['url'] .= ',' . $item['url']; //[url] => a.jpg,b.jpg,c.jpg
}
}
$res = array_values($res);
$a = array();
foreach ($res as $k => $v) {
if($v['url'] != "" && strpos($v['url'],",") !== false){
$a = explode(",", $res[$k]['url']);
$res[$k]['url'] = $a;
}
} echo "<pre>";
print_r($res);
echo "</pre>";