TTS using Google Translate API

gistfile1.php

<?php

class TTS {
  private $language;


  public function __construct($lang='nl') {
    $this->language = $lang;
  }

  public function toMP3($text, $file) {
    $parts = $this->splitText($text);
    $data = '';
    foreach($parts as $part) {
      if($part) {
        $url = "http://translate.google.com/translate_tts?tl=%s&q=%s";
        $data .= file_get_contents(sprintf($url, $this->language, urlencode($part)));
      }
    }
    file_put_contents($file, $data);
  }

  private function splitText($text) {
    $parts = array();
    $p = explode("\n", $text);
    foreach($p as $part) {
      if(strlen($part) >= 100) {
        $words = explode(' ', $part);
        $word_count = 0;
        $sentence = '';
        foreach($words as $i => $word) {
          $sentence = $word . ' ';
          if(isset($words[$i+1]) && strlen($word_count . $words[$i+1]) >= 100) {
            $parts[] = $sentence;
            $sentence = '';
          }
        }
        if(strlen($sentence)) {
          $parts[] = $sentence;
        }
      } else {
        $parts[] = $part;
      }
    }
    return $parts;
  }
}