PHP - How to merge n number of array in php

Question

How I can merge n arrays in PHP. The number of arrays is determined by the number of users who want to extract some information.

I need to make something like this

$result = array_merge_recursive ($tweets0, $tweets1, $tweets2, $tweets3, $tweets4, $tweets5, ... n);

How could I solve it?

An example with 3 arrays

The result is

This result is achievement with array_merge_recursive($tweets0, $tweets1, $tweets2) But what can I do when I join more arrays, and do not know whose number

I appreciate your help

voodoo417 · Accepted Answer · 2014-01-18 22:53:10Z

2

If you have array of N arrays, do it:

 $tweets = array($tweets0, $tweets1, $tweets2, $tweets3, $tweets4, $tweets5, ... n);

 $merged_tweets =  call_user_func_array('array_merge_recursive',$tweets);

See call_user_func_array.

answered Jan 18, 2014 at 22:53

voodoo417

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Alexander Ejbekov · Accepted Answer · 2014-01-18 22:53:52Z

1

Your safest bet is to store all the tweets into one array, instead of multiple variables.

And then something like:

$combined_tweets = array();
foreach($tweets as $k => $v)
    $combined_tweets = array_merge_recursive($combined_tweets, $v);

answered Jan 18, 2014 at 22:53

Alexander Ejbekov

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Victor Bocharsky · Accepted Answer · 2014-01-18 22:54:17Z

0

Try to use foreach

$arrs = array($tweets0, $tweets1, $tweets2, $tweets3, $tweets4, $tweets5);

$result = array();
foreach ($arrs as $arr) {
    $result = array_merge_recursive ($result, $arr);
}
var_dump($result);

answered Jan 18, 2014 at 22:54

Victor Bocharsky

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Nemo · Accepted Answer · 2014-01-18 22:56:59Z

0

Solution:

      Use the php function array_merge().

Syntax:

       array array_merge ( array $array1 [, array $... ] );

Description:

Merges the elements of one or more arrays together so that the values of one are appended to the end of the previous one. It returns the resulting array.

If the input arrays have the same string keys, then the later value for that key will overwrite the previous one. If, however, the arrays contain numeric keys, the later value will not overwrite the original value, but will be appended.

Values in the input array with numeric keys will be renumbered with incrementing keys starting from zero in the result array.

Example:

Code:     
   <?php

     $array1 = array("color" => "red", 2, 4);
     $array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
     $result = array_merge($array1, $array2);
     print_r($result);

   ?>

Output:

  Array
     (
      [color] => green
          [0] => 2
          [1] => 4
          [2] => a
          [3] => b
      [shape] => trapezoid
          [4] => 4
    )

Hope it will work.

answered Jan 18, 2014 at 22:56

Nemo

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1 Comment

Victor Bocharsky Over a year ago

And hе needs to use the array_merge_recursive() function, not the array_merge().

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