<?php

$str = 'exercise left for the reader';
var_dump(strlen($str));

var_dump(memory_get_peak_usage() / 1024 / 1024);

try {
	var_dump(json_decode($str, flags: JSON_THROW_ON_ERROR));
} catch (\Exception $e) {
	echo $e->getMessage(), PHP_EOL;
}

var_dump(memory_get_peak_usage() / 1024 / 1024);