Online PHP editor | output for s6dZe

@ 2014-08-02T23:40:36Z

<?php


function find_words($in) {
	$len = strlen($in);
	if ($len < 2) {
		return $in;
	}

    // no state
    $upper = function ($c) {
        return 'A' <= $c && $c <= 'Z';
    };
    $lower = function ($c) {
        return 'a' <= $c && $c <= 'z';
    };
    $alpha = function ($c) use ($upper, $lower) {
        return $upper($c) || $lower($c);
    };
    $num = function ($c) {
        return '0' <= $c && $c <= '9';
    };
    $alpha_num = function ($c) use ($alpha, $num) {
        return $alpha($c) || $num($c);
    };

    // stream state
	$pos = 0;
    $char = $in[0];
    $peek = function() use ($in, &$pos, $len) {
        if ($pos+1 >= $len) {
            return null;
        }
        return $in[$pos+1];
    };
	$next = function() use ($peek, &$pos, &$char) {
        $char = $peek();
        $pos++;
        return $char !== null;
	};

    // lex state
	$out = array();

    $std_word = null;
    $upr_word = null;
    $num_word = null;

	$find_word = function () use (&$char, $alpha_num, $lower, $upper, $next, $peek, &$std_word, &$upr_word, &$num_word) {
        while (!$alpha_num($char)) {
            if (!$next()) {
                return null;
            }
        }
        if ($lower($char)) {
            return $std_word; // lowercase word
        }
        if ($upper($char)) {
        	if ($upper($peek())) { // uppercase word
        	    return $upr_word;
    	    }
	        return $std_word; // capitalized word
        }
        return $num_word;
	};

    $upr_word = function() use (&$out, &$char, $next, $peek, $upper, $lower, $find_word) {
        $word = $char;
        while ($next() && $upper($char)) {
            if ($lower($peek())) { // start of capitalized word (e.g. FOOBar at B)
                break;
            }
            $word .= $char;
        }
        $out[] = $word;
        return $find_word;
    };
    $std_word = function() use (&$out, &$char, $next, $lower, $find_word) {
        $word = $char;
        while ($next() && $lower($char)) {
            $word .= $char;
        }
        $out[] = $word;
        return $find_word;
    };
    $num_word = function() use (&$out, &$char, $next, $num, $find_word) {
        $word = $char;
        while ($next() && $num($char)) {
            $word .= $char;
        }
        $out[] = $word;
        return $find_word;
    };

	$state = $find_word;
	while ($state !== null) {
		$state = $state();
	}
    return $out;
}


$samples = array(
    'FooBar123',
    'FooBAR123',
    'FOOBar123',
    'foo_bar_123_Baz',
    'FOO_bar_123BAZ',
    'FOO_Bar_123baz',
    'foo_BAR_123_baz',
    'foo_Bar_123_Baz',
    'Foo_bar_123_BAZ',
);



print_r(array_map(function ($name) {
    return array(
        'name' => $name,
        'words' => find_words($name),
    );
}, $samples));

Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Array ( [0] => Array ( [name] => FooBar123 [words] => Array ( [0] => Foo [1] => Bar [2] => 123 ) ) [1] => Array ( [name] => FooBAR123 [words] => Array ( [0] => Foo [1] => BAR [2] => 123 ) ) [2] => Array ( [name] => FOOBar123 [words] => Array ( [0] => FOO [1] => Bar [2] => 123 ) ) [3] => Array ( [name] => foo_bar_123_Baz [words] => Array ( [0] => foo [1] => bar [2] => 123 [3] => Baz ) ) [4] => Array ( [name] => FOO_bar_123BAZ [words] => Array ( [0] => FOO [1] => bar [2] => 123 [3] => BAZ ) ) [5] => Array ( [name] => FOO_Bar_123baz [words] => Array ( [0] => FOO [1] => Bar [2] => 123 [3] => baz ) ) [6] => Array ( [name] => foo_BAR_123_baz [words] => Array ( [0] => foo [1] => BAR [2] => 123 [3] => baz ) ) [7] => Array ( [name] => foo_Bar_123_Baz [words] => Array ( [0] => foo [1] => Bar [2] => 123 [3] => Baz ) ) [8] => Array ( [name] => Foo_bar_123_BAZ [words] => Array ( [0] => Foo [1] => bar [2] => 123 [3] => BAZ ) ) )
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => Array ( [name] => FooBar123 [words] => Array ( [0] => Foo [1] => Bar [2] => 123 ) ) [1] => Array ( [name] => FooBAR123 [words] => Array ( [0] => Foo [1] => BAR [2] => 123 ) ) [2] => Array ( [name] => FOOBar123 [words] => Array ( [0] => FOO [1] => Bar [2] => 123 ) ) [3] => Array ( [name] => foo_bar_123_Baz [words] => Array ( [0] => foo [1] => bar [2] => 123 [3] => Baz ) ) [4] => Array ( [name] => FOO_bar_123BAZ [words] => Array ( [0] => FOO [1] => bar [2] => 123 [3] => BAZ ) ) [5] => Array ( [name] => FOO_Bar_123baz [words] => Array ( [0] => FOO [1] => Bar [2] => 123 [3] => baz ) ) [6] => Array ( [name] => foo_BAR_123_baz [words] => Array ( [0] => foo [1] => BAR [2] => 123 [3] => baz ) ) [7] => Array ( [name] => foo_Bar_123_Baz [words] => Array ( [0] => foo [1] => Bar [2] => 123 [3] => Baz ) ) [8] => Array ( [name] => Foo_bar_123_BAZ [words] => Array ( [0] => Foo [1] => bar [2] => 123 [3] => BAZ ) ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Parse error: syntax error, unexpected T_FUNCTION in /in/s6dZe on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_FUNCTION in /in/s6dZe on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/s6dZe on line 11
Process exited with code 255.

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