Created
January 14, 2018 19:07
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| <?php | |
| if (isset($_POST['comment'])) { | |
| echo replaceWords($_POST['comment']); | |
| } else { | |
| echo renderForm(); | |
| } | |
| function replaceWords($comment) { | |
| $bad_words = ['fuck', 'shit', 'pussy']; | |
| $pattern = array_map(function($word) { | |
| $first = substr($word, 0, 1); | |
| $middle = substr($word, 1, -1); | |
| $last = substr($word, -1); | |
| return "/\b($first)$middle($last)\b/i"; | |
| }, $bad_words); | |
| return preg_replace($pattern, '$1***$2', $comment); | |
| } | |
| function renderForm() { | |
| return <<<HTML | |
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Bad words</title> | |
| </head> | |
| <body> | |
| <form id="my-form"> | |
| <textarea name="comment" id="comment"></textarea> | |
| </form> | |
| <pre id="result"></pre> | |
| <script> | |
| const form = document.getElementById('my-form') | |
| const message = document.getElementById('comment') | |
| const result = document.getElementById('result') | |
| message.addEventListener('input', () => { | |
| const data = new FormData(form) | |
| const xhr = new XMLHttpRequest() | |
| xhr.onload = () => { | |
| result.textContent = xhr.responseText | |
| } | |
| xhr.open('POST', 'validate.php') | |
| xhr.send(data) | |
| }) | |
| </script> | |
| </body> | |
| </html> | |
| HTML; | |
| } | |
| ?> |
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