How to resize image using wordpress function

Question

I want to resize image. Some times when we upload small image want to resize.

How can I do it?

Eg - When we upload 250px * 190px image I want to resize 450px * 200px

I used below code but it's not working:

add_image_size( 'img-fluid featured-purple-img', 475, 290, true ); // width, height, crop 

Answer 1

Adding the Image Size is just the first step. To make it avaible in the Media Uploader use this code in your functions.php

add_filter( 'image_size_names_choose', 'my_custom_sizes' );


function my_custom_sizes( $sizes ) {
    return array_merge( $sizes, array(
        'img-fluid featured-purple-img' => __( 'New Custom Size Name' ),
    ) );
}

If you want to use the image size in a template, this will do the trick:

if ( has_post_thumbnail() ) { 
    the_post_thumbnail( 'img-fluid featured-purple-img' ); 
}

Also I'm not quite sure how a whitespace in the image name affects functionality