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run code in 150+ php & hhvm versions
Bugs & Features
<?php class Similarity { protected $data = null; protected $distance = null; public function __construct($data, $distance) { $this->data = (string)$data; $this->distance = (int)$distance; } public function checkMatch($search, callable $checker=null, array $args=[], $return=false) { $data = preg_split('/\s+/', strtolower($this->data), -1, PREG_SPLIT_NO_EMPTY); $search = trim(preg_replace('/\s+/', ' ', strtolower($search))); foreach($this->getAssoc($data, substr_count($search, ' ')+1) as $assoc) { foreach($this->getPermutations($assoc) as $ordered) { $ordered = join(' ', $ordered); $result = call_user_func_array($checker, array_merge([$ordered, $search], $args)); if($result<=$this->distance) { return $return?$ordered:true; } } } return $return?null:false; } protected function getPermutations(array $input) { if(count($input)==1) { return [$input]; } $result = []; foreach($input as $key=>$element) { foreach($this->getPermutations(array_diff_key($input, [$key=>0])) as $subarray) { $result[] = array_merge([$element], $subarray); } } return $result; } protected function nextAssoc($assoc) { if(false !== ($pos = strrpos($assoc, '01'))) { $assoc[$pos] = '1'; $assoc[$pos+1] = '0'; return substr($assoc, 0, $pos+2). str_repeat('0', substr_count(substr($assoc, $pos+2), '0')). str_repeat('1', substr_count(substr($assoc, $pos+2), '1')); } return false; } protected function getAssoc(array $data, $count=2) { if(count($data)<$count) { return null; } $assoc = str_repeat('0', count($data)-$count).str_repeat('1', $count); $result = []; do { $result[]=array_intersect_key($data, array_filter(str_split($assoc))); } while($assoc=$this->nextAssoc($assoc)); return $result; } } $data = 'Niels Faurskov Andersen'; $search = [ 'Niels Andersen', 'Niels Faurskov', 'Niels Faurskov Andersen', 'Nils Faurskov Andersen', 'Nils Andersen', 'niels faurskov', 'niels Faurskov', 'niffddels Faurskovffre', 'niels faærskov' ]; $checker = new Similarity($data, 2); echo(sprintf('Testing "%s"'.PHP_EOL.PHP_EOL, $data)); foreach($search as $name) { echo(sprintf( 'Name "%s" has %s'.PHP_EOL, $name, ($result=$checker->checkMatch($name, 'levenshtein', [], 1)) ?sprintf('matched with "%s"', $result) :'mismatched' ) ); }
Output for 5.4.0 - 7.1.0
Testing "Niels Faurskov Andersen" Name "Niels Andersen" has matched with "niels andersen" Name "Niels Faurskov" has matched with "niels faurskov" Name "Niels Faurskov Andersen" has matched with "niels faurskov andersen" Name "Nils Faurskov Andersen" has matched with "niels faurskov andersen" Name "Nils Andersen" has matched with "niels andersen" Name "niels faurskov" has matched with "niels faurskov" Name "niels Faurskov" has matched with "niels faurskov" Name "niffddels Faurskovffre" has mismatched Name "niels faærskov" has matched with "niels faurskov"
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/bgotZ on line 13
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/bgotZ on line 13
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/bgotZ on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/bgotZ on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/bgotZ on line 4
Process exited with code 255.