Get search terms

getSearchTerms.js

/**
 * DWTFYW License
 *
 * Author: Tony Brix, http://tonybrix.info
 *
 * Example:
 *    positive terms -----------V-----------V---------V-------V-----------------------V
 * console.log(getSearchTerms("this -is 'a string' '-with' positive -'and negative' terms"));
 *    negative terms ----------------^-------------------------------------^
 * Result:
 * {
 *   "positive":  [
 *     "this",
 *     "a string",
 *     "-with",
 *     "positive"
 *     "terms"
 *   ],
 *   "negative":  [
 *     "is",
 *     "and negative"
 *   ]
 * }
 *
 * Get search terms separated by spaces from a search query.  Negative terms have a dash(-) in front. Terms can have space or dash if quoted.
 * @param {string} search Terms
 * @return {object} An array of the terms seperated by positive and negative
 */
function getSearchTerms(search) {
	const matches = search.match(/-?"[^"]+"|-?'[^']+'|\S+/g);

	// sort the terms
	const terms = {
		positive: [],
		negative: []
	};
	if (matches !== null) {
		for (let i = 0; i < matches.length; i++) {
			let match = matches[i];
			const negative = ("-" === match.substr(0, 1));
			if (negative) {
				match = match.substr(1);
			}
			if ((match.substr(0, 1) === "\"" && match.substr(-1) === "\"") || (match.substr(0, 1) === "'" && match.substr(-1) === "'")) {
				match = match.substr(1, match.length - 2);
			}
			if (negative) {
				terms.negative.push(match);
			} else {
				terms.positive.push(match);
			}
		}
	}

	return terms;
}

getSearchTerms.php

<?php
/**
 * DWTFYW License
 * 
 * Author: Tony Brix, http://tonybrix.info
 * 
 * Example:
 *    positive terms --------V-----------V---------V-------------------------------V
 * var_dump(getSearchTerms("this -is 'a string' '-with' -'positive and negative' terms"));
 *    negative terms -------------^--------------------------------^
 * Result:
 * array(2) {
 *   ["positive"]=>
 *  array(4) {
 *     [0]=>
 *     string(4) "this"
 *     [1]=>
 *     string(8) "a string"
 *     [2]=>
 *     string(5) "-with"
 *     [3]=>
 *     string(5) "terms"
 *   }
 *   ["negative"]=>
 *   array(2) {
 *     [0]=>
 *     string(2) "is"
 *     [1]=>
 *     string(21) "positive and negative"
 *   }
 * }
 * 
 * Get search terms separated by spaces from a search query.  Negative terms have a dash(-) in front. Terms can have space or dash if quoted.
 * @param string $search 
 * @return array An array of the terms seperated by positive and negative
 */
function getSearchTerms($search) {
	$matches = null;
	preg_match_all("/-?\"[^\"]+\"|-?'[^']+'|\S+/", $search, $matches);

	// sort the terms
	$terms = [
		"positive" => [],
		"negative" => []
	];
	foreach ($matches[0] as $match) {
		$negative = ("-" === $match[0]);
		if ($negative) {
			$match = substr($match, 1);
		}
		if (($match[0] === '"' && substr($match, -1) === '"') || ($match[0] === "'" && substr($match, -1) === "'")) {
			$match = substr($match, 1, strlen($match) - 2);
		}
		if ($negative) {
			$terms["negative"][] = $match;
		} else {
			$terms["positive"][] = $match;
		}
	}

	return $terms;
}