Extracting random sentence from larger text string based on int value-CodePudding

What I'm attempting to do here is feed into a function an article of words (could be anywhere from 100 to 500 words), once the article is fed in I am trying to randomly grab parts of the article depending on an int so for example if the int is 10 then I just need 10 words returned (but in order so the string makes sense) not the first 10 words of the article, it must be different each time.

Code:

<?php

function get_random_paragraph_from_article($article, $articleWordsCount)
{
    $spun = array();
    $text_array = explode(" ", $article);
    if (count($text_array) > $articleWordsCount) {
        $text = shuffle($text_array);      
        foreach ($text as $value) {
            $spun .= $value . " ";
        }
    }
    return $spun;
}


if (isset($_GET['getRandomArticle'])) {
    
    include($_SERVER['DOCUMENT_ROOT'] . "/includes/inc-db-connection.php"); 
    
    $pdo = new PDO(sprintf('%s:host=%s;dbname=%s', DRIVER, HOST, DATA), USER, PASS);
    
    $command = $pdo->prepare("SELECT * FROM `articles` WHERE `article_keyword` LIKE '%{$_GET['q']}%' ORDER BY RAND() LIMIT 1");
    $command->execute();  
    
    while ($row = $command->fetch()) {      
        echo print_r(get_random_paragraph_from_article($row['article_body'], $_GET['count']));                        
    }       

}

?>

What I do know is I need to split each word into an array which I have done here $text_array = explode(" ", $article); from here is where I get confused as to what the next step should be, I have tried Googling but nothing similar comes up that I can see, any help would be appreciated.

CodePudding user response：

You seem to be getting close, But your shuffle will make the sentences confusing as you no longer have the words in a meaningful order. Rather, you can take a random number rand() and then use it as the starting point of the words you want. As long as count(textArray) >= rand() articleWordCount, you can loop through the array from the starting index of rand() to articleWordCount.

function get_random_paragraph_from_article($article, $articleWordsCount)
{
    $spun = array();
    $max_words = count($text_array) - $articleWordsCount;
    $random_article_starting_point = rand(0,$max_words);
    $text_array = explode(" ", $article);
    if (count($text_array) > $articleWordsCount) {
        $spun = array_splice($text_array, $random_article_starting_point, $articleWordsCount);
    }
    return $spun; //Seems like you initially wanted an array
}

array_splice will get part of an array at the starting point until the offset.

Docs: array_splice: https://www.php.net/manual/en/function.array-splice.php rand: https://www.php.net/manual/en/function.rand.php