keywords_google.php

<?php

// ejemplo de uso
// https://dominio/keywords_google.php?search=lavadoras&lang=es

// resultados para la keyword lavadoras
// https://gist.github.com/vivirenremoto/e6373a847903501b8d2b07b6e658feab

function get_curl($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_TIMEOUT,60);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_ENCODING, '');
    curl_setopt($ch,CURLOPT_USERAGENT,'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13');
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    return $response;
}

function get_suggestions($search, $lang){
    $url = "http://suggestqueries.google.com/complete/search?output=firefox&hl=" . $lang . "&q=" . urlencode($search);
    $json = json_decode( get_curl($url) );
    return $json[1];
}


$search = $_GET['search'];
$lang = isset($_GET['lang']) ? $_GET['lang'] : 'es';
$keywords = array();


$json1 = get_suggestions($search, $lang);
foreach( $json1 as $value1 ){
    $keywords[] = $value1;

    $json2 = get_suggestions($value1, $lang);
    foreach( $json2 as $value2 ){
        $keywords[] = $value2;

        $json3 = get_suggestions($value2, $lang);
        foreach( $json3 as $value3 ){
            $keywords[] = $value3;

            $json4 = get_suggestions($value3, $lang);
            foreach( $json4 as $value4 ){
                $keywords[] = $value4;
            }
        }
    }
}

$keywords = array_unique($keywords);

sort($keywords);

echo '<b>' . count($keywords) . ' keywords</b><br>';

foreach( $keywords as $keyword ){
    echo $keyword . '<br>';
}