چطور میشه از تکرار foreach جلوگیری کرد?

poyaazim · Sep 12, 2008

دوستان, کد زیر یک rss feed reader هستش. من میخوام تعداد نمایش لینکهای RSS رو محدود کنم, مثلا 10 لینک رو نشون بده. در حال حاظر کل لینکهای فید رو نشون میده.

کد:

<?
/*
RSS Reader Class 1.0
Gregwiz RSS Reader is a simple RSS integration class
Author: Suppakit Taethaweesap http://www.gregwiz.com
License:     GPL
*/
class RssReader{
	var $xml_parser;
	var $rss_content;
	var $currentTag = '';
	var $currentAttribs = '';
	var $depth = 0;
	var $main;
	var $item_counter = 0;
	var $cache_dir = 'temp';

	function Rss_Reader ($file) {
		$this->xml_parser = xml_parser_create();
		xml_set_object($this->xml_parser, $this);
		xml_set_element_handler($this->xml_parser, startElement, endElement);
		xml_set_character_data_handler($this->xml_parser, characterData);
		if($this->cache_time > 0) {
			$usedcache = false;
			$cache_file = $this->cache_dir . '/rsscache_' . md5($file);
			if (file_exists($cache_file)) {
				$timedif = @(time() - filemtime($cache_file));
				if ($timedif < $this->cache_time) {
					// cached file is fresh enough, return cached array
					$file = $cache_file;
					$usedcache = true;
				} 
			}
		}
		if (!($fp = fopen($file, "r"))) {
			die("could not open XML input");
		}
		
		$read = '';
		while ($data = fread($fp, 4096)) {
			if (!xml_parse($this->xml_parser, $data, feof($fp))) {
				die(sprintf("XML error: %s at line %d",
							xml_error_string(xml_get_error_code($this->xml_parser)),
							xml_get_current_line_number($this->xml_parser)));
			}
			$read .= $data;
		}
		xml_parser_free($this->xml_parser);
		if($this->cache_time > 0) {
			if (!$usedcache) {
				if (file_exists($cache_file)) { unlink($cache_file);	}
				$f = @fopen($cache_file, 'w');
				fwrite ($f, $read);
				fclose($f);
			}
		}
		echo '<div>';
		foreach ($this->rss_content[items] as $content) {
			echo '<div class="newsfeed"><a href="'.$content[link].'" target="_blank">'.$content[title].'</a>'.'</div>';
		}
		echo '</div>';
	}


	function startElement($parser, $name, $attrs) {
		$name = strtolower($name);
		switch($name) {
   		case "rss":
   		case "rdf:rdf":
   		case "items":
   			$this->currentTag = "";
   			break;
   		case "channel":
   			$this->main = "channel";
   			break;
   		case "image":
   			$this->main = "image";
   			$this->rss_content["image"] = array();
   			break;
   		case "item":
   			$this->main = "items";
   			break;
   		default:
   			$this->currentTag = $name;
   			break;
   		}
	}

	function endElement($parser, $name) {
		$name = strtolower($name);
		$this->currentTag = "";
        if ($name == "item") {
   			$this->item_counter++;
   		}
	}

	function characterData($parser, $data) {
		if ($this->currentTag != "") {
			switch($this->main) {
				case "channel":
					if (isset($this->rss_content[$this->currentTag])) {
						$this->rss_content[$this->currentTag] .= $data;
					} else {
						$this->rss_content[$this->currentTag] = $data;
					}
					break;
				case "image":
					if (isset($this->rss_content[$this->main][$this->currentTag])) {
						$this->rss_content[$this->main][$this->currentTag] .= $data;
					} else {
						$this->rss_content[$this->main][$this->currentTag] = $data;
					}
					break;
				case "items":
					if (isset($this->rss_content[$this->main][$this->item_counter][$this->currentTag])) {
						$this->rss_content[$this->main][$this->item_counter][$this->currentTag] .= $data;
					} else {
						$this->rss_content[$this->main][$this->item_counter][$this->currentTag] = $data;
					}
					break;
			}
		}
	}
	
}
?>

Domanjiri · Sep 12, 2008

سلام

راستشو بخواي من كدت رو نخوندم ولي فقط كافيه به جاي foreach از حلقه for استفاده بكني ، اونجا ميتوني تعداد رو مشخص كني!

يا علي

sajadmaz · Sep 12, 2008

PHP:

$count = 1;
echo '<div>';

foreach ($this->rss_content[items] as $content) 
{
if ($count == 10 ) { break;}

echo '<div class="newsfeed"><a href="'.$content[link].'" target="_blank">'.$content[title].'</a>'.'</div>';
$count++;
}
echo '</div>';