Example PHPBench PHP 8.1 errors

Filetime_VS_MD5_VS_Hash_File_Bench.php

<?php
/**
 * @notice This file must live in a "benchmarks" directory for this exmaple.
 */
class Filemtime_VS_MD5_VS_Hash_File_Bench {

	/**
	 * @Revs(1000)
	 * @Iterations(3)
	 */
	public function bench_filetime() : void {
		filemtime( __FILE__ );
	}


	/**
	 * @Revs(1000)
	 * @Iterations(3)
	 */
	public function bench_md4_file() : void {
		hash_file( 'md4', __FILE__ );
	}


	/**
	 * @Revs(1000)
	 * @Iterations(3)
	 */
	public function bench_md5_file() : void {
		md5_file( __FILE__ );
	}


	/**
	 * @Revs(1000)
	 * @Iterations(3)
	 */
	public function bench_fnv1a_file() : void {
		hash_file( 'fnv1a64', __FILE__ );
	}


	/**
	 * @Revs(1000)
	 * @Iterations(3)
	 */
	public function bench_murmur_file() : void {
		hash_file( 'murmur3f', __FILE__ );
	}
}

phpbench.json

{
  "runner.php_disable_ini": true,
  "runner.path": "benchmarks"
}

run.cmd

php phpbench.phar run