<?php
/*
 * aryInit.php -- test stub
 *
 * The point of this test stub is to test the initialization of member arrays.  Since declared arrays cannot be set
 * to null without generating a warning, this stub tests initializing an array using the empty bracket shorthand and
 * then calls a method to add a line of text to the array.
 *
 * What we want to see, and we do, is that the initialization of the array doesn't create a blank/null first record
 * and that the newly assigned string is set to element 0 of the array.
 *
 * OUTPUT:
 * =======
 * On init:
 * testArray::__set_state(array(
 *    'foo' =>
 *   array (
 *   ),
 * ))
 * On insert:
 * testArray::__set_state(array(
 *    'foo' =>
 *   array (
 *     0 => 'This is a test',
 *   ),
 * ))
 * Execution ends.
 *
 *
 * 01-08-20     mks     DB-150: original coding
 *
 */
class testArray {
    public array $foo;

    public function __construct()
    {
        $this->foo = [];
    }

    public function addString(string $newLine): bool
    {
        if (!is_string($newLine)) return false;
        $this->foo[] = $newLine;
        return true;
    }
}

$objTest = new testArray();
echo 'On init: ' . PHP_EOL;
var_export($objTest);
echo PHP_EOL;
if ($objTest->addString('This is a test')) {
    echo 'On insert: ' . PHP_EOL;
    var_export($objTest);
    echo PHP_EOL;
} else {
    echo 'Failed to insert string!' . PHP_EOL;
}
echo 'Execution ends.' . PHP_EOL;