array_push not working in foreach loop
array-push, arrays, loops, php
Solution
Because `$arr` does not seems to be an array. Change your code to,
foreach($members as $key => $item){
array_push($members[$key], $key); //or $members[$key][] = $key;
}
Problem
`print_r($members)` coming like this following result ``` Array ( [myname] => Array ( [userid] => 52 [age] => 46 ) Array ( [hisname] => Array ( [userid] => 22 [age] => 47 ) Array ( [yourname] => Array ( [userid] => 47 [age] => 85 ) ``` `array_push()` push not working in the `foreach` loop ``` foreach($members as $key => $item){ // print "<br>" . $key ."<br>"; array_push($members, '$key'); } ``` The result expecting like this following code with the `array_push()` ``` Array ( [myname] => Array ( [userid] => 52 [age] => 46 [0] => myname) Array ( [hisname] => Array ( [userid] => 22 [age] => 47 [0] => hisname) Array ( [yourname] => Array ( [userid] => 47 [age] => 85 [0] => yourname) ``` result Warning: array_push() expects parameter 1 to be array, null given in C:\xampp\htdocs\index.php on line 126 Warning: array_push() expects parameter 1 to be array, null given in C:\xampp\htdocs\index.php on line 126 Warning: array_push() expects parameter 1 to be array, null given in C:\xampp\htdocs\index.php on line 126