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<?php echo sprintf("\n%.1fMB", memory_get_usage(true) / 1024 / 1024); // allocate a large byte string of around 5 MB $a = str_repeat("0", 5 * 1024 * 1024); echo sprintf("\n%.1fMB", memory_get_usage(true) / 1024 / 1024); // setting the memory limit lower than the current is accepted ini_set("memory_limit", "3M"); echo sprintf("\n%.1fMB", memory_get_usage(true) / 1024 / 1024); // further allocation beyond the limit $b = str_repeat("0", 5 * 1024 * 1024); echo sprintf("\n%.1fMB", memory_get_usage(true) / 1024 / 1024);

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34.88 ms | 461 KiB | 5 Q