<?php function generateRandomString($length = 10) { $characters = '0123456789abcdefghijklmnopqrstuvwxyz-_.'; $charactersLength = strlen($characters); $randomString = ''; for ($i = 0; $i < $length; $i++) { $randomString .= $characters[rand(0, $charactersLength - 1)]; } return $randomString; } $unique = array(); for ($i = 0; $i < 9000000; $i++) { $u=$i+1; $random = generateRandomString(5); if(!in_array($random, $unique)){ echo $u.".m".$random."@[server]\n"; $unique[] = $random; gc_collect_cycles(); }else{ echo "duplicate detected"; $i--; } } echo memory_get_peak_usage();
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