How to Add Elements to Subarrays in a PHP Multidimensional Array Using array_push

Appending Elements to a Multidimensional PHP Array with array_push

When working with multidimensional arrays, adding elements to subarrays can sometimes pose a challenge. In this example, we have a multidimensional array named $md_array with two subarrays 'recipe_type' and 'cuisine'. The task involves adding new elements to these subarrays using the array_push function.

Understanding Multidimensional Arrays

A multidimensional array is simply an array within an array. The subarrays can have their own keys and values, creating a hierarchical structure. In $md_array, 'recipe_type' contains arrays with numeric keys, while 'cuisine' has numeric keys and associative arrays as values.

Using array_push for Subarrays

To add an element to a subarray using array_push, we need to identify the key of the desired subarray. Let's consider adding an element to 'recipe_type':

<code class="php">$newdata = [
    'wpseo_title' => 'test',
    'wpseo_desc' => 'test',
    'wpseo_metakey' => 'test'
];

// Incrementally add elements to 'recipe_type'
$md_array["recipe_type"][] = $newdata;</code>

By using the square brackets [], we can add the $newdata array to the end of 'recipe_type'.

Associative Subarrays

Adding elements to associative subarrays requires a slightly different approach. In this case, with 'cuisine', we need to use the array key as a parameter to array_push:

<code class="php">$newdata = [
    'wpseo_title' => 'test',
    'wpseo_desc' => 'test',
    'wpseo_metakey' => 'test'
];

// Add elements to 'cuisine' using an existing key
array_push($md_array["cuisine"], $newdata);</code>

Conclusion

By understanding the structure of multidimensional arrays and using the appropriate syntax for adding elements, we can easily modify the contents of these arrays. array_push is a versatile function that allows us to append new elements to both incremental and associative subarrays.

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