In this article you will learn how to merge two or more arrays into one array in PHP. You can easily do it after use array_merge() function to merge the elements or values of two or more arrays together into a single array.

array_merge() function

The array_merge() function merges one or more arrays into one array. Note: If two or more array elements have the same key, the last one overrides the others.

Merge two or more arrays into one array in PHP

<?php
$array1 = array("yellow", "red", "green", "orange", "purple");
$array2 = array("pink", "brown", "green", "orange", "red");
$array  = array_merge($array1, $array2);
print_r($array);
?>

The above example will output:

Array
(
    [0] => yellow
    [1] => red
    [2] => green
    [3] => orange
    [4] => purple
    [5] => pink
    [6] => brown
    [7] => green
    [8] => orange
    [9] => red
)

The post How to merge two or more arrays into one array in PHP ? appeared first on The Code Developer.

In this tutorial, we will explain you how to merge two arrays without duplicate values in PHP. You can use the PHP array_unique() function and PHP array_merge() function together to merge two arrays into one array without duplicate values in PHP.

Merge two arrays

You can use PHP array_merge function for merging both arrays into one array. it’s giving output like this.

<?php
$array1 = array("yellow", "red", "green", "orange", "purple");
$array2 = array("pink", "brown", "green", "orange", "red");
$array  = array_merge($array1, $array2);
print_r($array);
?>

Array
(
    [0] => yellow
    [1] => red
    [2] => green
    [3] => orange
    [4] => purple
    [5] => pink
    [6] => brown
    [7] => green
    [8] => orange
    [9] => red
)

In above output you can see there are many duplicate entries But we want to remove these duplicate entries before merging both array.

Merge two arrays without duplicate values in PHP

Now we will use array_unique() and array_merge() both PHP function together to merge two arrays and remove duplicate values like in below example:

<?php
$array1 = array("yellow", "red", "green", "orange", "purple");
$array2 = array("pink", "brown", "green", "orange", "red");
$array = array_unique(array_merge($array1, $array2));
print_r($array);
?>

The above example will output:

Array
(
    [0] => yellow
    [1] => red
    [2] => green
    [3] => orange
    [4] => purple
    [5] => pink
    [6] => brown
)

In above output you can see we merged both arrays without duplicate values that’s what we want.

The post How to merge two arrays without duplicate values in PHP? appeared first on The Code Developer.

In this article you will learn how to remove empty array elements and reindex from an array in PHP. You can easily do it after use array_values() and array_filter() function together to remove empty array elements and reindex from an array in PHP.

array_filter() function

The PHP array_filter() function remove empty array elements or values from an array in PHP. This will also remove blank, null, false, 0 (zero) values.

array_values() function

The PHP array_values() function returns an array containing all the values of an array. The returned array will have numeric keys, starting at 0 and increase by 1.

Remove Empty Array Elements and Reindex In PHP

First let’s see the $stack array output :

<?php
$stack = array("PHP", "HTML", "CSS", "", "JavaScript", null, 0);
print_r($stack);
?>

Output:

Array
(
    [0] => PHP
    [1] => HTML
    [2] => CSS
    [3] => 
    [4] => JavaScript
    [5] => 
    [6] => 0
)

In above output we want to remove blank, null, 0 (zero) values and then reindex array elements. Now we will use array_values() and array_filter() function together like in below example:

<?php
$stack = array("PHP", "HTML", "CSS", "", "JavaScript", null, 0);
print_r(array_values(array_filter($stack)));
?>

Output:

Array
(
    [0] => PHP
    [1] => HTML
    [2] => CSS
    [3] => JavaScript
)

The post Remove Empty Array Elements and Reindex In PHP appeared first on The Code Developer.

In this article we will discuss how to get the first element of an array in PHP. There are many ways to get the first element of an array in PHP.

Get the first element of an array in PHP

We are using several method like direct accessing the 0th index, foreach loop, reset() function, array_shift() function, array_slice() function and array_values() to get the first element of an array.

Method #1 By direct accessing the 0th index:

<?php
$stack_array = array( 'code', 'developer','programming', 'blog');
echo $stack_array[0];
?>

The above example will output:

code

Method #2 Using foreach loop

<?php
$stack_array = array( 'code', 'developer','programming', 'blog');

$max_loop    = 1; //this is the desired value of looping
$count       = 0; //first we set the count to be zero
foreach ($stack_array as $key => $value) {
    echo $value;
    $count++; //increase the value of the count by 1
    if ($count == $max_loop) { //break the loop is count is equal to the max_loop
        break;
    }
}
?>

The above example will output:

code

Method #3 Using reset() function

The reset() function moves the internal pointer to the first element of the array and returns the value of the first array element.

Syntax

reset(array)

<?php 
$stack_array = array( 'code', 'developer','programming', 'blog');
echo reset($stack_array);
?>

The above example will output:

code

Method #4 Using array_shift() function

The array_shift() function removes the first element from an array, and returns the value of the removed element.

Syntax

array_shift(array)

<?php
$stack_array = array( 'code', 'developer','programming', 'blog');
$first_element = array_shift($stack_array);
echo $first_element;
?>

The above example will output:

code

Method #5 Using array_slice() function

The array_slice() function returns the sequence of elements from the array as specified by the offset and length parameters.

Syntax

array_slice(array,start,length,preserve)

<?php 
$stack_array = array( 'code', 'developer','programming', 'blog');
$first_element = array_slice($stack_array, 0, 1);
echo $first_element[0];
?>

The above example will output:

code

Method #6 Using array_values() function

The array_values() function returns an array containing all the values of an array. The returned array will have numeric keys, starting at 0 and increase by 1.

Syntax

array_values(array)

<?php 
$stack_array = array( 'code', 'developer','programming', 'blog');
$first_element = array_values($stack_array);
echo $first_element[0];
?>

The above example will output:

code

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