php array of arrays to single array code example

Example 1: php combine arrays

$output = array_merge($array1, $array2);

Example 2: array merge in php

/* Array merge is basically use to merge the two array data. */
  
<?php
$a1=array("red","green");
$a2=array("blue","green","yellow");
print_r(array_merge($a1,$a2));
?>
  
/*
Output:
Array ( [0] => red [1] => green [2] => blue [3] => green [4] => yellow )
*/
  
<?php
$a1=array("a"=>"red","b"=>"green");
$a2=array("c"=>"blue","b"=>"yellow");
print_r(array_merge($a1,$a2));
?>

/*
Output:
Array ( [a] => red [b] => yellow [c] => blue )
*/
  
/* In above example you can check the difference in output 
it takes all values of both array in final output, but not in associative array you can check.
because one value gets overwritten by same key reference in both array.
*/

Example 3: php multiple array to single array

$array = array_column($array, 'plan'); 
// plan adalah nama kolom nya  
// $array adalah variable nya 
// semisal pengen membuat get data jadi single array bisa seperti ini 
     $CI = get_instance(); 
	 $DB1 = $CI->load->database('nama_db', TRUE);
	 $sql = "select dept from v_dept_distinct order by dept asc ";
	  $query=$DB1->query($sql);
	  // print_r(array_column($query->result_array() , 'dept')); 
	  return  array_column($query->result_array() , 'dept');