[WordPress] Basic routine to pass an array of values from PHP to JavaScript.

php-to-js.php

<?php

/* Create an array of data to pass */
$obj = array( 
    'foo' => $foo, 
    'bar' => $bar, 
    'multifoo' => array( 'foo1', 'foo2' ) 
);

/* Enqueue javascript (assuming jQuery has been enqueued already)  */
wp_enqueue_script( 'script-handler', 'plugin-script.js', 'jquery', false, true );

/* Pass array as javascript object */
wp_localize_script( 'script-handler', 'obj', $obj );

plugin-script.js

;(function($){

    // Create object from PHP array values
    $.Obj = {
        foo : obj.foo, 
        bar : obj.bar,
        multifoo : obj.multifoo // obj.multifoo[0], obj.multifoo[1] usw.
    }
    
    // Check values in console
    console.log( 
        'foo: ' + $.Obj.foo +"\n"+
        'bar: ' + $.Obj.bar +"\n"+
        'multifoo [0]: ' + $.Obj.multifoo[0] +', '+
        'multifoo [1]: ' + $.Obj.multifoo[1] +', '+
        'multifoo [2]: ' + $.Obj.multifoo[2]
    );

}(jQuery))