Online PHP editor | output for EFdLW

@ 2020-07-29T14:45:56Z

<?php

function benchmark(string $name, callable $callback) {
    $string = ')(§"!$&&))§/$"=$/%$%$!§%%"§=)$(&§"&$/%!(%(!$(%$!=!%==!§(%§$8234@#$ABCFG3478&* hello';

    $time = microtime(true);
    
    for ($i = 0; $i < 100_000; ++$i) {
        $callback($string);
    }
    
    $time = microtime(true) - $time;
    
    echo number_format($time, 6), 's: ', $name, ' (result: ', $callback($string), ")\n";
}

benchmark('preg', function (string $string) {
    $firstLetter = null;
    
    if (preg_match('/[a-z0-9]/i', $string, $match)) {
        $firstLetter = $match[0];
    }

    return $firstLetter;
});

benchmark('ctype_alnum', function (string $string) {
    $length = strlen($string);
    $firstLetter = null;
    
    for ($i = 0; $i < $length; ++$i) {
        if (ctype_alnum($string[$i])) {
            $firstLetter = $string[$i];
            break;
        }
    }
    
    return $firstLetter;
});

benchmark('strcspn', function (string $string) {
    return $string[strcspn($string, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")] ?? null;
});

Output for 7.4.8: 0.033587s: preg (result: 8) 0.225340s: ctype_alnum (result: 8) 0.694287s: strcspn (result: 8)
Output for 7.4.7: 0.062920s: preg (result: 8) 0.259254s: ctype_alnum (result: 8) 0.637390s: strcspn (result: 8)
Output for 7.4.6: 0.040168s: preg (result: 8) 0.240447s: ctype_alnum (result: 8) 0.638092s: strcspn (result: 8)
Output for 7.4.5: 0.064419s: preg (result: 8) 0.263502s: ctype_alnum (result: 8) 0.785059s: strcspn (result: 8)
Output for 7.4.4: 0.041186s: preg (result: 8) 0.221145s: ctype_alnum (result: 8) 0.598469s: strcspn (result: 8)
Output for 7.4.3: 0.037540s: preg (result: 8) 0.220236s: ctype_alnum (result: 8) 0.675878s: strcspn (result: 8)
Output for 7.4.2: 0.041142s: preg (result: 8) 0.260334s: ctype_alnum (result: 8) 0.667934s: strcspn (result: 8)
Output for 7.4.1: 0.059451s: preg (result: 8) 0.257777s: ctype_alnum (result: 8) 0.587912s: strcspn (result: 8)
Output for 7.4.0: 0.052054s: preg (result: 8) 0.295840s: ctype_alnum (result: 8) 0.616256s: strcspn (result: 8)
Output for 7.2.0 - 7.2.32, 7.3.0 - 7.3.20: Parse error: syntax error, unexpected '_000' (T_STRING), expecting ';' in /in/EFdLW on line 8
Process exited with code 255.

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