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‎img/m-worldmap.jpg‎

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‎img/search.png‎

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‎img/worldmap.jpg‎

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‎index.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="theme-color" media="(prefers-color-scheme: dark)" content="black" />
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<meta name="description" content="Search for the city you are interested in and get basic information about it such as: status of the city, population, country in which it is located and country abbreviation, coordinates of the city.">
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<link rel="icon" href="./img/search.png">
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<link rel="apple-touch-icon" href="./img/search.png">
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<link rel="stylesheet" href="./style.css">
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<title>Search city info</title>
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</head>
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<body>
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<main>
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<section class="search-block">
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<h1>Find a city and get information about it</h1>
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<p>(Capitals, cities, towns)</p>
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<form id="search-form">
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<label>
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<input id="search" type="text" spellcheck="false" autocomplete="off" placeholder="City name">
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<button id="reset" type="reset" title="Click me to clear the input field">&#215;</button>
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</label>
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<output>
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<ul id="hint"></ul>
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</output>
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</form>
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</section>
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<section class="result-block">
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<ul id="result"></ul>
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</section>
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</main>
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<div class="mask"></div>
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<script src="./script.js"></script>
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</body>
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</html>

‎php/core.php‎

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<?php
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require_once './function.php';
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$request = trim(file_get_contents("php://input"));
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$request = json_decode($request, true);
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$action = $request['action'];
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switch($action) {
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case 'inputSearch':
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inputSearch();
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break;
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case 'loadCityInfo':
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loadCityInfo();
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break;
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}
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‎php/createKeywords.php‎

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<?php
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/*
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This function needed to create keywords from a string, which is target for search.
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Having keywords column in DB table makes search more efficient, because:
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-Saves time for processing the target string during the search.
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-Creates the possibility of adding new keywords by which the target string can be found without changing it.
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-Creates the possibility of excluding exception words (or service words).
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!!! Before you use the code make sure that you have created 'keywords' column in target table.
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In this example I have created keywords for the table 'cities'.
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*/
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$conn = mysqli_connect("host", "login", "password", "database");
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mysqli_query($conn, "SET NAMES 'utf8' COLLATE 'utf8_general_ci'");
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mysqli_query($conn, "SET CHARACTER SET 'utf8'");
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// This process can take for a while if you have a lot of items in the table. You can increase the time if necessary.
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ini_set('max_execution_time', 1000);
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// words that do not carry a semantic load for search (use optionally)
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$servWords = array("and", "or", "of", "a", "the", "some", "any");
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$errors = [];
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$sql = "SELECT `city`, `id` FROM `cities`";
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$res = mysqli_query($conn, $sql);
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while ($row = mysqli_fetch_assoc($res)) {
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$textArr = [];
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$keysArr = [];
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$id = $row['id'];
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$name = preg_replace("/[^\w\s]/iu", "", $row['city']);
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$textArr = preg_split("/[\W]/iu", mb_strtolower($name), null, PREG_SPLIT_NO_EMPTY);
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foreach ($textArr as $aKey => $a) {
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if (!in_array($a, $servWords)) {
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$keysArr[] = $a;
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}
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// OR (if you don't want to use exceptions)
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// $keysArr[] = $a;
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}
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$keys = implode("+", $keysArr);
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$keys = '+' . $keys;
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$sql2 = "UPDATE `cities` SET `keywords`='$keys' WHERE `id`='$id'";
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$res2 = mysqli_query($conn, $sql2);
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if ($res2 == false) {
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$errors[] = 'error with city ' . $row['city'] . '-' . $row['id'];
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}
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}
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if (empty($errors)) {
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echo '1';
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} else {
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echo json_encode($errors);
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}
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mysqli_close($conn);

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