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| <?php | |
| $str = 'fD3_'; | |
| $chars = array_merge(range('a', 'z'), range('A', 'Z'), range('0', '9'), ['_']); | |
| $total = 0; | |
| $brut = ''; | |
| $len = strlen($str); | |
| /** | |
| * @see: https://www.programmingalgorithms.com/algorithm/brute-force?lang=PHP | |
| */ | |
| function BruteForce($testChars, $startLength, $endLength, $testCallback) { | |
| for ($len = $startLength; $len <= $endLength; ++$len) { | |
| for ($i = 0; $i < $len; ++$i) $chars[$i] = $testChars[0]; | |
| if ($testCallback($chars)) return implode("", $chars); | |
| for ($i1 = $len - 1; $i1 > -1; --$i1) { | |
| $i2 = 0; | |
| $testCharsLen = strlen($testChars); | |
| for ($i2 = strpos($testChars, $chars[$i1]) + 1; $i2 < $testCharsLen; ++$i2) { | |
| $chars[$i1] = $testChars[$i2]; | |
| if ($testCallback($chars)) return implode("", $chars); | |
| for ($i3 = $i1 + 1; $i3 < $len; ++$i3) { | |
| if ($chars[$i3] != $testChars[$testCharsLen - 1]) { | |
| $i1 = $len; | |
| break 2; | |
| } | |
| } | |
| } | |
| if ($i2 == $testCharsLen) $chars[$i1] = $testChars[0]; | |
| } | |
| } | |
| return false; | |
| } | |
| $brut = BruteForce(implode("", $chars), 1, $len, function ($testChars) use($str, &$total) { | |
| $total++; | |
| return strcmp(implode($testChars), $str) == 0; | |
| }); | |
| print sprintf("Full string: %s => %d\r\n", $brut, $total); | |
| $total = 0; | |
| $brut = ''; | |
| $len = strlen($str); | |
| for($i = 0; $i < $len; $i++){ | |
| foreach($chars as $char){ | |
| $total++; | |
| if(ord($char) == ord($str[$i])){ | |
| $brut .= $char; | |
| continue 2; | |
| } | |
| } | |
| } | |
| print sprintf("By char: %s => %d\r\n", $brut, $total); |
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