PHP, foreach doesnt return an array but array_map with same code returns an array -

i want foreach return arrays returns single array. array_map with same code does.

• what correct way of getting arrays out of foreach.
• why foreach behaves differently array_map.

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inside file (userdata.php)

reme:reme1991@jourrapide.com george bush:georgebush@gmail.com obama:obama@gmail.com 

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using array_map

function registered_users(){  $file_user = file('userdata.php');     return array_map(function($user){         return explode(':',$user);     },$file_user);     } //returns exploded array correctly. 

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using foreach

function registered_users(){      $file_user = file('userdata.php');         foreach ($file_user $user) {             return explode(':',$user);     }  }// returns array ( [0] => reme [1] => reme1991@jourrapide.com )  

because array_map() iterates on elements in array.... foreach() same except return jumping out of on first iteration.

function registered_users(){     $users = [];     $file_user = file('userdata.php');     foreach ($file_user $user) {         $users[] = explode(':',$user);     }     return $users; } 

edit

in response question "why doesn't return array_map terminate iteration?"

because array_map() function loops/iterates every element in array, executing "callback" function against each element. return in "callback" function, acts on 1 individual array element @ time, , called multiple times array_map(), once each element of array in turn.

the return in "callback" returning modified value one individual element (the current element in array_map() loop) array_map() function.... it's telling array_map() new element value should be.

the array_map() function can't interrupted: continue iterating on next element, sending in turn "callback" function until has done every element in array.