gist #1: fuzzy substring search, exchange currency (stand-alone) - PHP

В этом посте 2 gist-исходника на PHP:

1. Нечёткий поиск подстрок в тексте с произвольным окончанием слов.
2. Функция для простой конвертации валют.

	<?php
	function fuzzyChain($search,$where,$skipFirst=0) {
	/********************************
	FuzzyChain
	©Copyright,2017 @xmoonlight
	https://github.com/xmoonlight
	********************************/
	$spaces="\s";
	$sWords=preg_split("/[".$spaces."]+/iu",$search);
	$wWords=preg_split("/[".$spaces."]+/iu",$where);
	$OnlyRu = "БбвГгДдЁёЖжЗзИиЙйЛлмнПптУФфЦцЧчШшЩщЪъЫыЬьЭэЮюЯя";
	$OnlyEn = "DdFfGghIiJjLlNQqRrSstUVvWwYZz";
	$Rus = array("А","а","В","Е","е","К","к","М","Н","О","о","Р","р","С","с","Т","у","Х","х","З","О","1","т","и","а","@","п","ь");
	$Eng = array("A","a","B","E","e","K","k","M","H","O","o","P","p","C","c","T","y","X","x","3","0","i","m","u","@","a","n","b");
	$RRus=array();
	$REng=array();
	foreach ($Rus as $k=>$i) $RRus[$k]="/".$i."/u";
	foreach ($Eng as $k=>$i) $REng[$k]="/".$i."/u";
	$wordPos=0;
	$chain=0;
	foreach($wWords as $wpos=>$w) {
	$w=mb_strtolower($w, 'UTF-8');
	$s=mb_strtolower($sWords[$chain], 'UTF-8');
	if(!preg_match("/[".$OnlyEn."]/u",$w)) {
	$w=preg_replace($REng,$Rus,$w);
	$s=preg_replace($REng,$Rus,$s);
	} else {
	$w=preg_replace($RRus,$Eng,$w);
	$s=preg_replace($RRus,$Eng,$s);
	}
	$found=0;
	$d=0;
	$pos=0;
	$len=min(mb_strlen($w),mb_strlen($s));
	for ($i = 0; $i < $len-$skipFirst; $i++) {
	if (mb_substr($s,$skipFirst+$d,1)===mb_substr($w,$skipFirst+$i,1)) {
	if($d==0) $pos=$i;
	$d++;
	} else $d=0;
	if (mb_substr($s,$skipFirst,$len-$pos)===mb_substr($w,$skipFirst+$pos,$len-$pos) || $d>=$len/2) {
	$found=1;break;
	}
	}
	if ($found===1) {
	$chain++;
	if ($chain===1) $wordPos=$wpos;
	if ($chain===count($sWords)) break;
	} else $chain=0;
	}
	if ($chain===count($sWords)) return array($wordPos+1,$wWords[$wordPos]);
	else return false;
	}
	///MAIN///
	$search='протектор зимней шины';
	$where='Одним из основных элементов реnpoтeктушкатоpатора зимних шин являются ламели.';
	if ($result=fuzzyChain($search,$where)) echo 'Найдено с '.$result[0].'-го слова: ['.$result[1].']';
	else echo 'Ничего не найдено';
	?>

view raw fuzzyChain_test.php hosted with ❤ by GitHub

	<?php
	function exchange($amount,$give,$get) {
	$exchanges=[
	'USD:RUB'=>60,
	'RUB:USD'=>1/60,
	];
	$in=[$give.':'.$get=>$amount];
	$key=key($in);
	if ($amount>0 && $exchanges[$key]) {
	$out=$exchanges[$key]*$in[$key];
	return $out.' '.explode(':',$key,2)[1];
	} else return false;
	}
	///MAIN////
	if ($out=exchange(2,'USD','RUB')) echo $out;
	else echo 'Exchange is not possible!';
	?>

view raw exchange.php hosted with ❤ by GitHub