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将二维数组按键值相同的重组数组

Array

(

[0] => Array

(

[title] => 111

[name] => 上海

)

[1] => Array

(

[title] => 111

[name] => 江苏

)

[2] => Array

(

[title] => dd

[name] => 上海

)

[3] => Array

(

[title] => dd

[name] => 江苏

)

[4] => Array

(

[title] => dd

[name] => 浙江

)

)

按照title一样的，重新组合数组为：Array

(

[0] => Array

(

[title] => 111

[name] => 上海,杭州

)

[1] => Array

(

[title] => dd

[name] => 上海,宁波,无锡

)

)


实现代码：

function array_group_concat($ar, $field, $group_by) {

$res = array();
foreach($ar as $row) {
$g = $row[$group_by];
if(isset($res[$g])) $res[$g][$f