php edit array value inside forloop

Question

I have an array of arrays, and I want to loop them while assigning a new key-value for each. But the original array fails to response. Here is my try:

<?php
$cards = array(
    array(
        "test" => 1  
    ),array(
        "test" => 2      
    )
);

foreach($cards as $card){
    $card["success"] = 1;
}

print_r($cards);

OUTPUT:

Array
(
    [0] => Array
        (
            [test] => 1
        )

    [1] => Array
        (
            [test] => 2
        )

)

How can I modify the method hence the 'success' value can be inserted into each of them?

Tuyen · Accepted Answer · 2017-04-18 03:56:51Z

3

Passing array elements by reference (notice the & sign):

foreach($cards as &$card){
    $card["success"] = 1;
}

answered Apr 18, 2017 at 3:56

Tuyen

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Comments

Sahil Gulati · Accepted Answer · 2017-04-18 03:57:53Z

1

You can use it like this. Here we are inserting value on the iteration of $key.

Try this code snippet here

<?php
ini_set('display_errors', 1);
$cards = array(
    array(
        "test" => 1  
    ),array(
        "test" => 2      
    )
);

foreach($cards as $key=> $card){
    $cards[$key]["success"] = 1;//Inserting value on the a key of $cards
}

print_r($cards);

Output:

Array
(
    [0] => Array
        (
            [test] => 1
            [success] => 1
        )

    [1] => Array
        (
            [test] => 2
            [success] => 1
        )

)

answered Apr 18, 2017 at 3:57

Sahil Gulati

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