<?php
	function not_null($value) {
		if (is_array($value)) {
			if (sizeof($value) > 0) {
				return true;
			} else {
				return false;
			}
		} else {
			if (($value != '') && (strtolower($value) != 'null') && (strlen(trim($value)) > 0)) {
				return true;
			} else {
				return false;
			}
		}
	}
	
	//generate a random sentence
	function sentence($min = 1, $max = 10) {
		if (!isset($_SESSION['dic'])) {
			$_SESSION['dic'] = file_get_contents('_private/dictionary.txt');
			
			$_SESSION['dic'] = str_replace("\r", "\t", $_SESSION['dic']);
			$_SESSION['dic'] = str_replace("\n", "\t", $_SESSION['dic']);
			$_SESSION['dic'] = str_replace("\t\t", "\t", $_SESSION['dic']);
			$_SESSION['dic'] = explode("\t", $_SESSION['dic']);
		}
		$total_words = sizeof($_SESSION['dic']) - 1;
		
		srand ((float) microtime() * 10000000);
		$words = rand($min, $max);
		
		$sentence = '';
		for ($i = 0; $i < $words; $i++) {
			$id = rand(0, $total_words);
			$sentence .= ' ' . $_SESSION['dic'][$id];
		}
		
		return trim($sentence);
	}
?>