php - How can I convert multiple arrays into one single variable string? -

i have 3 arrays this:

$a = ["a1", "a2", "a3", "a4", "a5"]; $b = ["b1", "b2", "b3", "b4", "b5"]; $c = ["c1", "c2", "c3", "c4", "c5"]; 

i looking way convert 3 arrays single string , save in variable this:

$abc = "a1 , b1, c1, a2, b2, c2, a3, b3, c3, a4, b4, c4, a5, b5, c5"; 

i have tried imploding, maybe method not good. using php 5.4.

note

please note following code can used, not willing use it. works me, feel reinventing wheel:

array_push($abc, $a); array_push($abc, ","); array_push($abc, $b); array_push($abc, ","); array_push($abc, $c);  if ($key < (sizeof($a)-1)){     array_push($abc, ","); } 

this should work you:

just loop through 3 arrays @ once array_map(). first transpose array format:

array (     [0] => a1, b1, c1     [1] => a2, b2, c2     [2] => a3, b3, c3     [3] => a4, b4, c4     [4] => a5, b5, c5 ) 

then implode() array expected string.

code:

<?php      $a = ["a1", "a2", "a3", "a4", "a5"];     $b = ["b1", "b2", "b3", "b4", "b5"];     $c = ["c1", "c2", "c3", "c4", "c5"];      $result = implode(", ", array_map(function($v1, $v2, $v3){         return "$v1, $v2, $v3";     }, $a, $b, $c));      echo $result;  ?> 

output:

a1, b1, c1, a2, b2, c2, a3, b3, c3, a4, b4, c4, a5, b5, c5