多くのメモリを使用する短いPHP - cURL + XMLreader

Question

私は単純なcURLリクエストを実行し、いくつかのデータを解析するPHPスクリプトを用意しています。これらのうち4つは私のサイトのWebユーザーごとに実行され、psでは12MのRAMを使用してこれらのプロセスが表示されます。私は基本的にループと意思決定に至るまで、このスクリプトのすべてを取り除くことができたので、メモリがcURLで漏れているとわかりますが、どうすればよいかわかりません。

CURLのキーがありませんか？これでメモリやプロセッサ時間を節約できますか？ここで

<?php 
//Caching 
$cachefile = '../../playlistcache/curplayingBOSUN_cache.html'; 
$cachetime = 18; 
// Serve from the cache if it is younger than $cachetime 
if (file_exists($cachefile) && time() - $cachetime < filemtime($cachefile)) { 
include($cachefile); 
echo "<!-- Cached copy, generated ".date('H:i', filemtime($cachefile))." -->\n"; 
exit; 
} 
ob_start(); // Start the output buffer 


// URL to your Shoutcast server, including port 
// don't put in the http:// part! do it like you see here 
// also, reverse DNS lookup needs to be on, or this probably won't work 
$server = "SERVERADDRESS"; 

// Admin password for your Shoutcast server 
$password = "SERVERPASSWORD"; 


$mysession = curl_init(); 
curl_setopt($mysession, CURLOPT_URL, "http://$server/admin.cgi?sid=1&mode=viewxml"); 
curl_setopt($mysession, CURLOPT_HEADER, false); 
curl_setopt($mysession, CURLOPT_RETURNTRANSFER, true); 
curl_setopt($mysession, CURLOPT_POST, false); 
curl_setopt($mysession, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); 
curl_setopt($mysession, CURLOPT_USERPWD, "admin:$password"); 
curl_setopt($mysession, CURLOPT_FOLLOWLOCATION, true); 
curl_setopt($mysession, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); 
$xml = curl_exec($mysession); 
curl_close($mysession); 

$songs = "\n"; 
$xmlreader = new XMLReader(); 
$xmlreader->xml($xml); 

//$xmlreader->next('SHOUTCASTSERVER'); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 
$xmlreader->read(); 

$songs .= "\n"; 
$songs .= $xmlreader->readString(); 
echo $songs; 


// Cache the output to a file 
$fp = fopen($cachefile, 'w'); 
fwrite($fp, ob_get_contents()); 
fclose($fp); 
ob_end_flush(); // Send the output to the browser 


?> 

は、それが解析するXMLです：

<SHOUTCASTSERVER> 
<CURRENTLISTENERS>2</CURRENTLISTENERS> 
<PEAKLISTENERS>29</PEAKLISTENERS> 
<MAXLISTENERS>300</MAXLISTENERS> 
<UNIQUELISTENERS>2</UNIQUELISTENERS> 
<AVERAGETIME>16318</AVERAGETIME> 
<SERVERGENRE>Misc</SERVERGENRE> 
<SERVERURL></SERVERURL> 
<SERVERTITLE></SERVERTITLE> 
<SONGTITLE>The Velvet Underground - White Light/White Heat</SONGTITLE> 
<NEXTTITLE/> 
<STREAMHITS>5093</STREAMHITS> 
<STREAMSTATUS>1</STREAMSTATUS> 
<STREAMPATH>/urbos.mp3</STREAMPATH> 
<BITRATE>96</BITRATE> 
<CONTENT>audio/mpeg</CONTENT> 
<VERSION>2.0.0.29 (posix(linux x86))</VERSION> 
<LISTENERS> 
<LISTENER> 
<HOSTNAME></HOSTNAME> 
<USERAGENT>unregularradio/1.0 CFNetwork/548.0.4 Darwin/11.0.0</USERAGENT> 
<CONNECTTIME>114</CONNECTTIME> 
<UID>0xb3a0a0cc</UID> 
</LISTENER> 
<LISTENER> 
<HOSTNAME></HOSTNAME> 
<USERAGENT> 
iTunes/10.5.3 (Windows; Microsoft Windows Vista Business Edition Service Pack 2 (Build  6002)) AppleWebKit/534.52.7 
</USERAGENT> 
<CONNECTTIME>32522</CONNECTTIME> 
<UID>0xb4104f0c</UID> 
</LISTENER> 
</LISTENERS> 
<SONGHISTORY> 
<SONG> 
<PLAYEDAT>1329390441</PLAYEDAT> 
<TITLE>The Velvet Underground - White Light/White Heat</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329390265</PLAYEDAT> 
<TITLE>Kim Hiorthøy - Torture Happiness</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329390087</PLAYEDAT> 
<TITLE>Wild Adriatic - The Writer</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329390058</PLAYEDAT> 
<TITLE>UNregular Radio - Lift Fest www.liftfest.com</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329389770</PLAYEDAT> 
<TITLE>Mister Vertigo - Spear Hill</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329389627</PLAYEDAT> 
<TITLE>The Pinkerton Thugs - Together</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329389360</PLAYEDAT> 
<TITLE>Jack Johnson - Go On</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329389154</PLAYEDAT> 
<TITLE> 
Yung Damon!_My Show ft. Gucci Mane prod. by Big Hurt (Dirty) 
</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329388975</PLAYEDAT> 
<TITLE>Gayle Skidmore - Bad For Me</TITLE> 
</SONG> 
<SONG> 
<PLAYEDAT>1329388741</PLAYEDAT> 
<TITLE>Dubb Zero - Track two</TITLE> 
</SONG> 
</SONGHISTORY> 
</SHOUTCASTSERVER> 

Answer 1

あなたは異なるアプローチを使用して、オブジェクトを反復処理したい、とあなたが取得したい場合があり、プレーンテキストとして出力を保存するinstedあり特定の値。これは役に立ちます：

<?php 
header('Content-Type:text/html; charset=UTF-8');//Required for chars like ø 
//do you curl and save results or use local copy. 
$xml=file_get_contents('songs.xml'); 

$xmlreader = new XMLReader(); 
$xmlreader->xml($xml); 

$i=0; 
$replace=array("\r\n", "\r", "\n", "\t"); 
while ($xmlreader->read()) { 
    if ($xmlreader->name === 'SONG' && $xmlreader->nodeType == XMLReader::ELEMENT) { 
     $song[$i]['date']=substr(str_replace($replace,'',$xmlreader->readString()),0,10); 
     $song[$i]['title']=substr(str_replace($replace,'',$xmlreader->readString()),10); 
    $i++; 
    } 
} 

//do your saving here, you could also json_encode the array for easy access. 
print_r($song); 
/* 
Array 
(
    [0] => Array 
     (
      [date] => 1329390441 
      [title] => The Velvet Underground - White Light/White Heat 
     ) 

    [1] => Array 
     (
      [date] => 1329390265 
      [title] => Kim Hiorthøy - Torture Happiness 
     ) 

    [2] => Array 
     (
      [date] => 1329390087 
      [title] => Wild Adriatic - The Writer 
     ) 

    [3] => Array 
     (
      [date] => 1329390058 
      [title] => UNregular Radio - Lift Fest www.liftfest.com 
     ) 

    [4] => Array 
     (
      [date] => 1329389770 
      [title] => Mister Vertigo - Spear Hill 
     ) 

    [5] => Array 
     (
      [date] => 1329389627 
      [title] => The Pinkerton Thugs - Together 
     ) 

    [6] => Array 
     (
      [date] => 1329389360 
      [title] => Jack Johnson - Go On 
     ) 

    [7] => Array 
     (
      [date] => 1329389154 
      [title] => Yung Damon!_My Show ft. Gucci Mane prod. by Big Hurt (Dirty) 
     ) 

    [8] => Array 
     (
      [date] => 1329388975 
      [title] => Gayle Skidmore - Bad For Me 
     ) 

    [9] => Array 
     (
      [date] => 1329388741 
      [title] => Dubb Zero - Track two 
     ) 

) 

*/ 
?>