2组数据分割成字符串以“，”隔开

二组数据分割成字符串以“，”隔开
Array
(
[0] => Array
(
[mobile] => 13814002394
)

[1] => Array
(
[mobile] => 13814002395
)

[2] => Array
(
[mobile] => 13814002396
)

[3] => Array
(
[mobile] => 13814002397
)

[4] => Array
(
[mobile] => 13814002398
)

[5] => Array
(
[mobile] => 13814002399
)

[6] => Array
(
[mobile] => 13814002400
)
）

这是得出的二组数组，我想分割成字符串 $mobile=13814002399,13814002400,13814002398;

这样只的形式 php 数组 字符

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------解决方案--------------------

$array=array(

	'0'=>array('mobile'=>'13814002394'),

	'1'=>array('mobile'=>'13814002395'),       

	'2'=>array('mobile'=>'13814002396'),

	'3'=>array('mobile'=>'13814002397'),