The cleanLongWords() function presented in this page can be used to clean text with multiple consecutive characters and long words in PHP. Useful to clean texts that users add in input text fields or textarea.
By default, the function allows maximum 2 consecutive repetitions of characters in words, but not affects the numbers, and split the word to maximum 23 characters. See the comments in code, and example below.

Code of the cleanLongWords() function

- Click to select it.
function cleanLongWords($text, $nrchr=2, $maxword=23) {
// function to clean text with multiple consecutive characters and very long words ( http://coursesweb.net/ )
// $nrchr = allowed number of consecutive character
// $maxword = maximum word length
  $paterns = array();
  $chr = array('q','w','e','r','t','y','u','i','o','p','a','s','d','f','g','h','j','k','l',';','z','x','c','v','b','n','m',',','!','@','#','%','&','_','=',':','"','`','~',';','â','á','é','í','ó','ú','ý','ø','č','ć','đ','š','ž','ā','ä','ǟ','ḑ','ē','ī','ļ','ņ','ō','ȯ','ȱ','õ','ȭ','ŗ','š','ț','ū','ž','ş','î','ă',"'",'$','\^','\*','\(','\)','\{','\}','\|','\?','\.','\[','\]','\/','\\\\','\>','\<');

  // uncomment next line if you want to clean consecutive numbers too
  ///  $chr = array_merge($chr, array('1','2','3','4','5','6','7','8','9','0'));
  $n_chr = count($chr);
  for($i=0; $i<$n_chr; $i++) {$paterns[$i] = '/(['. $chr[$i] .']{'. $nrchr .',}){2,}/i'; }
  $text = preg_replace($paterns, '$1', $text);

  // if $maxword > 0, split the word to specified number of characters
  return ($maxword > 0) ? wordwrap($text, $maxword, ' ', true) : $text;
}

Example usage

<?php
// Here Add the cleanLongWords() function

$text = '\\\\\\\\\  A ttttttteeeeeeeeexxxxxxt with loooooonnnnnngggggg woooooooooooords and coooooonnnnnnsssssseeeeeeccccccuuuuuuttttttiiiiiivvvvvveeeeeee characteeeeeerrrrrrssssss [[[[[]]]]]] ///////......';


$text1 = cleanLongWords($text);
$text2 = cleanLongWords($text, 3);    // allow 3 consecutive repetitions of characters
$text3 = cleanLongWords($text, 1, 0);    // not consecutive characters, and not split the word

echo '$text1 - '. $text1;
echo '<br>$text2 - '. $text2;
echo '<br>$text3 - '. $text3;
?>
- Result:
$text1 - \\ A tteexxt with loonngg woords and coonnsseeccuuttiivvee characteerrss [[]] //..
$text2 - \\\\\ A ttteeexxxt with looonnnggg wooords and cooonnnssseeecccuuuttti iivvveee characteeerrrsss [[[[[]]] ///...
$text3 - \ A text with long words and consecutive characters [] /.

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which tag renders as emphasized text, displaying the text oblique?
<strong> <pre> <em>
<p>Web development courses: <em>CoursesWeb.net</em></p>
Which CSS property defines the space between the element border and its content?
margin padding position
h3 {
  padding: 2px 0.2em;
}
Click on the method which returns the first element that matches a specified group of selectors.
getElementsByName() querySelector() querySelectorAll()
// gets first Div with class="cls", and shows its content
var elm = document.querySelector("div.cls");
alert(elm.innerHTML);
Indicate the PHP variable that contains data from a form sent with method="post".
$_SESSION $_GET $_POST
if(isset($_POST["field"])) {
  echo $_POST["field"];
}
Delete multiple consecutive characters and Split long words

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