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run code in 200+ php & hhvm versions
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<?php for ($i=0; $i<10; $i++) { echo 'HTX-'.base26_encode(random_int(208827064576, 5429503678975)), PHP_EOL; }
Output for 5.6.38
Fatal error: Call to undefined function base26_encode() in /in/LQlXO on line 3
Process exited with code 255.