PHP/Data Structure/array merge

Appending One Array to Another

 
<?php
  function array_display($array, $pre=FALSE){
    $tag = $pre ? "pre" : "p";
    printf("<%s>%s</%s>\n", $tag, var_export($array, TRUE), $tag);
  }
  $arr1 = array(1, 2, 3);
  $arr2 = array(10, 20, 30);
  $arr3 = array(5, 10, 15, 20);
  
  $comb1 = array_merge($arr1, $arr2);
  $comb2 = array_merge($arr2, $arr1);
  $comb3 = array_merge($arr3, $arr2, $arr1);
  
  array_display($comb1);
  array_display($comb2);
  array_display($comb3);
?>
<?php
 
  $arr4 = array(10 => "a", 11 => "b", 12 => "c");
  
  array_display(array_merge($arr1, $arr4), TRUE);
  array_display($arr1 + $arr4, TRUE);
?>
<?php
  $arr5 = array(1 => "x", 2 => "y", 3 => "z");
  
  array_display(array_merge($arr1, $arr5), TRUE);
  array_display($arr1 + $arr5, TRUE);
?>
<?php
  $dogs1 = array( "L" => "C", "B" => "S","R" => "A");
  $dogs2 = array("R" => "D", "T" => "S");
  array_display(array_merge($dogs1, $dogs2), TRUE);
  array_display($dogs1 + $dogs2, TRUE);
?>

array_merge

 
<?php
$face = array("J","Q","K","A");
$numbered = array("2","3","4","5","6","7","8","9");
$cards = array_merge($face, $numbered);
shuffle($cards);
print_r($cards);
?>

array_merge() and + operator

 
<?php 
    function array_display($array, $pre=FALSE) { 
        $tag = $pre ? "pre" : "p"; 
        printf("<%s>%s</%s>\n", $tag, var_export($array, TRUE), $tag); 
    } 
    $arr4 = array(10 => "a", 11 => "b", 12 => "c"); 
    $arr1 = array(1, 2, 3); 
    
    array_display(array_merge($arr1, $arr4), TRUE); 
    array_display($arr1 + $arr4, TRUE); 
?>

array_merge() example

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

array_merge( ) function combines two or more arrays by renumbering numerical indexes and overwriting string indexes

 
array array_merge ( array arr1 [, array arr2 [, array ...]] )
<?
    $toppings1 = array("Pepperoni", "Cheese", "Anchovies", "Tomatoes");
    $toppings2 = array("Ham", "Cheese", "Peppers");
    $both_toppings = array_merge($toppings1, $toppings2);
    var_dump($both_toppings);
?>

array_merge() function merges 1 to N arrays together

 
The function"s syntax is: array array_merge (array array1, array array2, . . ., array arrayN)
<?
    $arr_1 = array ("s", "g", "l");
    $arr_2 = array ("b", "c", "l");
    $arr_3 = array ("p", "o");
    
    $arr_4 = array_merge ($arr_2, $arr_1, $arr_3);
    print_r($arr_4);
?>

array_merge( ) retains array keys when possible.

 
<?
    $arr1 = array("Paul"=>25, "I"=>38, "Nick"=>27);
    $arr2 = array("I"=>27, "Paul"=>38);
    print "Merge:\n";
    var_dump(array_merge($arr1, $arr2));
?>

obtaining the union of two arrays

 
<?php 
    function array_display($array, $pre=FALSE) { 
        $tag = $pre ? "pre" : "p"; 
        printf("<%s>%s</%s>\n", $tag, var_export($array, TRUE), $tag); 
    } 
    $arr5 = array(1 => "x", 2 => "y", 3 => "z"); 
    $arr1 = array(1 => "x", 2 => "y", 3 => "z"); 
    
    array_display(array_merge($arr1, $arr5), TRUE); 
    array_display($arr1 + $arr5, TRUE); 
?>

Using array_merge() and the + operator with associative arrays as well

 
<?php 
    function array_display($array, $pre=FALSE) { 
        $tag = $pre ? "pre" : "p"; 
        printf("<%s>%s</%s>\n", $tag, var_export($array, TRUE), $tag); 
    } 
    $dogs1 = array("A" => "C", "B" => "C", "D" => "C"); 
    $dogs2 = array("a" => "a", "b" => "b"); 
   
   array_display(array_merge($dogs1, $dogs2), TRUE); 
   array_display($dogs1 + $dogs2, TRUE); 
?>