php 将某个数组里的字符串二次拆分后的某个值再次拼接成字符串

来源：互联网发布：网络代理店编辑：程序博客网时间：2024/06/06 04:49

array(3) {  [0] => array(4) {    ["class_id"] => string(2) "16"    ["class_type"] => string(1) "1"    ["class_time"] => string(10) "1483545600"    ["week_time"] => string(24) "1:12,2:12,3:12,4:12,5:12"  }  [1] => array(4) {    ["class_id"] => string(2) "21"    ["class_type"] => string(1) "1"    ["class_time"] => string(10) "1485100800"    ["week_time"] => string(23) "1:7,2:7,3:7,4:7,5:7,6:7"  }  [2] => array(4) {    ["class_id"] => string(2) "22"    ["class_type"] => string(1) "1"    ["class_time"] => string(10) "1485100800"    ["week_time"] => string(23) "1:7,2:7,3:7,4:7,5:7,6:7"  }}
代码:
foreach($class_info as $k=>$v){    $vr=explode(',',$v['week_time']);    $str='';    foreach($vr as $key =>$val){        $str.=','.explode(':',$val)[0];//对吗    }    $class_info[$k]['weektime']=substr($str,1);}
结果:

array(3) {  [0] => array(5) {    ["class_id"] => string(2) "16"    ["class_type"] => string(1) "1"    ["class_time"] => string(10) "1483545600"    ["week_time"] => string(24) "1:12,2:12,3:12,4:12,5:12"    ["weektime"] => string(9) "1,2,3,4,5"  }  [1] => array(5) {    ["class_id"] => string(2) "21"    ["class_type"] => string(1) "1"    ["class_time"] => string(10) "1485100800"    ["week_time"] => string(23) "1:7,2:7,3:7,4:7,5:7,6:7"    ["weektime"] => string(11) "1,2,3,4,5,6"  }  [2] => array(5) {    ["class_id"] => string(2) "22"    ["class_type"] => string(1) "1"    ["class_time"] => string(10) "1485100800"    ["week_time"] => string(23) "1:7,2:7,3:7,4:7,5:7,6:7"    ["weektime"] => string(11) "1,2,3,4,5,6"  }}

0 0