PHP Exercises: Cut out words of 3 to 6 characters length from a given sentence not more than 1024 characters

Last update on May 30 2022 11:44:32 (UTC/GMT +8 hours)

PHP: Exercise-74 with Solution

Internet search engine giant, such as Google accepts web pages around the world and classify them, creating a huge database. The search engines also analyze the search keywords entered by the user and create inquiries for database search. In both cases, complicated processing is carried out in order to realize efficient retrieval, but basics are all cutting out words from sentences.
Write a PHP program to cut out words of 3 to 6 characters length from a given sentence not more than 1024 characters.

Input: Multiple character strings are given. One string is given per line

Input:
English sentences consisting of delimiters and alphanumeric characters are given on one line.

Sample Solution: -

PHP Code:

<?php
$stdin = trim(fgets(STDIN));
echo "Original string: ".$stdin; 
$words = preg_split("/[\s,\.]/", $stdin);
$compWords = array();
for ($i = 0; $i < count($words); $i++) {
  if (strlen($words[$i]) > 2 && strlen($words[$i]) < 7) {
    $compWords[] = $words[$i];
  }
}
echo "\nWords  of 3 to 6 characters length: ";
print implode(' ', $compWords) . PHP_EOL;

?>

Sample Input:
The quick brown fox

Sample Output:

Original string: The quick brown fox
Words  of 3 to 6 characters length: The quick brown fox

Flowchart:

PHP Code Editor:

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PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC