convert more arrays into single array - php

Question

Convert these array into one array
Array ( [0] => 10 )
Array ( [0] => 17 )
Array ( [0] => 17 )
Array ( [0] => 15 )
I want an output like this:
Array ( [0] => 10 ,[1] => 17,[2] => 17,[3] => 15)

Answer 1

$a=array(10);$b=array(17);$c=array(17);$d=array(15);
print_r(array_merge($a,$b,$c,$d));
//Array([0]=>10 [1]=>17 [2]=>17 [3]=>15)

Answer 2

Assuming that your Main Array contains some sub-arrays nested within it like so:
<?php
$arrNestedArray = array(
array(10),
array(17),
array(17),
array(15),
array("data"=>array("fName"=>"Cosmic", "lName"=>"Joy")),
);
And, now; you want to take-out all the values of every element in the sub-arrays and turn them into direct elements of the Main Array. You can do that with array_walk... and then build up your Flat Array having the Structure you had anticipated like this:
<?php
// CREATE AN EMPTY ARRAY TO HOLD THE FINAL RESULT YOU DESIRED...
$singleArray = array();
// THIS IS A SAMPLE OF THE MAIN ARRAY CONTAINING SUB ARRAYS...
$arrNestedArray = array(
array(10),
array(17),
array(17),
array(15),
array("data"=>array("fName"=>"Cosmic", "lName"=>"Joy")),
);
array_walk($arrNestedArray, function($data, $index) use(&$singleArray) {
if( is_array($data) ) {
foreach ($data as $key=>$item) {
if(!in_array($item, $singleArray)) {
if(is_array($item)) {
$singleArray[$key] = $item;
}else{
$singleArray[$index] = $item;
}
}
}
}
});
var_dump($singleArray);
Finally, while you might still want to test it out here; the var_dump above produces something like this:
array (size=4)
0 => int 10
1 => int 17
3 => int 15
'data' =>
array (size=2)
'fName' => string 'Cosmic' (length=6)
'lName' => string 'Joy' (length=3)

Answer 3

Use array_merge with call_user_func_array:
$a = array(Array ( 0 => 10 ), Array ( 0 => 17 ), Array ( 0 => 17 ), Array ( 0 => 15 ));
$ra = call_user_func_array('array_merge', $a);
print_r($ra); // Array ( [0] => 10 [1] => 17 [2] => 17 [3] => 15 )