How to insert an element in any position in php

Question

I am with an array like $x = array(1,2,3,4,5); i would like to add element 6 in between 3 and 4 and make it like array(1,2,3,6,4,5);

how do i make it in that place or first place?

score 2 · Answer 1 · answered Sep 26 '10 at 17:39

2

array_insert($array,$pos,$val);

function array_insert($array,$pos,$val)
{
    $array2 = array_splice($array,$pos);
    $array[] = $val;
    $array = array_merge($array,$array2);

    return $array;
}

answered Sep 26 '10 at 17:39

sushil bharwani

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`array_insert()` is not pre-defined in PHP. You need to create it yourself. – BoltClock Sep 26 '10 at 17:39
This answer is the function definition of `array_insert()` – Kevin Lacquement Sep 26 '10 at 17:42

score 1 · Accepted Answer · answered Sep 26 '10 at 17:40

1

Try this:

$x = array(1,2,3,4,5);
$x = array_merge(array_slice($x, 0, 3), array(6), array_slice($x, 3));
print_r($x);

Output;

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 6
    [4] => 4
    [5] => 5
)

answered Sep 26 '10 at 17:40

codaddict

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82
492
529

score 1 · Answer 3 · answered Sep 26 '10 at 17:46

1

Use array_splice($array, $pos, 0, array($val)).

answered Sep 26 '10 at 17:46

aib

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`$length` is 0 by default; and this doesn't do what the OP asked for. This will replace the element in `$pos` with `$val`, not insert at `$pos`. – NullUserException Sep 26 '10 at 17:48
Take a look at Example #2. A `$length` of 0, though undocumented, causes insertion. I noticed `= 0` in the parameter list too, it must be an artifact. – aib Sep 26 '10 at 17:53
This does exactly what KoolKabin asked for, and doesn't replace any elements. But it's unnecessary to place the inserted value into an array. Also, this question seems to me an exact duplicate of this 9-hour-old question: http://stackoverflow.com/questions/3797239/php-array-insert-new-item-in-any-position/3797526#3797526 – GZipp Sep 26 '10 at 19:15
@GZipp: It is if you want to insert an array, object or NULL. – aib Sep 26 '10 at 22:08
Absolutely true, and since doing it that way makes the operation safer, I retract that part of my comment. – GZipp Sep 26 '10 at 23:18

score 0 · Answer 4 · answered Sep 26 '10 at 17:45

It can by done like this:

function array_insert_value(array $array = array(), $value = null, $position = null)
{
    if(empty($position)) 
        return array_merge($array, array($value));
    else 
        return array_merge(
            array_slice($array, 0, $position),
            array($value),
            array_slice($array, $position)
        );    
}

score 0 · Answer 5 · answered Sep 26 '10 at 18:06

I cam up with this function. I have also included the code I used for testing I hope this helps.

function chngNdx($array,$ndex,$val){
    $aCount = count($array);

    for($x=($aCount)-1;$x>=$ndex;$x--){
        $array[($x+1)] = $array[$x];
    }

    $array[$ndex] = $val;

    return $array;
}

$aArray = array();
$aArray[0] = 1;
$aArray[1] = 2;
$aArray[2] = 3;
$aArray[3] = 4;
$aArray[4] = 5;
$ndex =  3;     // # on the index to change 0-#
$val = 6;

print("before: ".print_r($aArray)."<br />");
$aArray = chngNdx($aArray,$ndex,$val);
print("after: ".print_r($aArray)."<br />");

How to insert an element in any position in php

5 Answers5