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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$memory = memory_get_usage();
$array = range(0, 99);
printf('memory: %s%s', memory_get_usage() - $memory, PHP_EOL);
$array['qwe'] = 'new item value';
printf('memory: %s%s', memory_get_usage() - $memory, PHP_EOL);