preg_match_all顯示多個結果

Question

我試圖從一個頁面獲取此消息（METAR），並顯示一切只是在沒有樣式和額外信息的其他php文件中。 目前我使用此代碼：

<?php 
$options = array('http' => array(
'method' => 'GET', 
)); 

$config= stream_context_create($options); 
$config_final=file_get_contents('http://www.smn.gov.ar/mensajes/index.php?observacion=metar&operacion=consultar&87582=on&87641=on&87750=on&87765=on&87222=on&87761=on&87860=on&87395=on&87344=on&87166=on&87904=on&87571=on&87347=on&87803=on&87576=on&87162=on&87532=on&87497=on&87097=on&87046=on&87548=on&87217=on&87506=on&87692=on&87418=on&87574=on&87715=on&87374=on&87289=on&87852=on&87178=on&87896=on&87823=on&87270=on&87155=on&87453=on&87925=on&87934=on&87480=on&87047=on&87553=on&87311=on&87909=on&87436=on&87509=on&87912=on&87623=on&87444=on&87129=on&87371=on&87645=on&87022=on&87127=on&87828=on&87121=on&87938=on&87791=on&87448=on',false, $config); 
preg_match_all("|<td width=\"100%\">METAR (.*)</td>|sU", $config_final, $tiempo); 
echo $tiempo[1][0]; 
?> 

</div> 

使用的代碼，我只能得到第一METAR，啥子我需要的是看到他們在不同的線路，如顯示不同的結果。 任何想法？

在此先感謝

Answer 1

我建議你使用PHP的內置HTML解析器對於這一點，特別是DOMDocument，並使用DOMXpath搜尋那些針。

例子：

$url = 'http://www.smn.gov.ar/mensajes/index.php?observacion=metar&operacion=consultar&87582=on&87641=on&87750=on&87765=on&87222=on&87761=on&87860=on&87395=on&87344=on&87166=on&87904=on&87571=on&87347=on&87803=on&87576=on&87162=on&87532=on&87497=on&87097=on&87046=on&87548=on&87217=on&87506=on&87692=on&87418=on&87574=on&87715=on&87374=on&87289=on&87852=on&87178=on&87896=on&87823=on&87270=on&87155=on&87453=on&87925=on&87934=on&87480=on&87047=on&87553=on&87311=on&87909=on&87436=on&87509=on&87912=on&87623=on&87444=on&87129=on&87371=on&87645=on&87022=on&87127=on&87828=on&87121=on&87938=on&87791=on&87448=on'; 
$dom = new DOMDocument(); 
libxml_use_internal_errors(true); 
$dom->loadHTMLFile($url); 
libxml_clear_errors(); 
$xpath = new DOMXpath($dom); 

// search for td's with contains METAR 
$metars = $xpath->query('//td[contains(text(), "METAR")]'); 
if($metars->length <= 0) { 
    echo 'no metars found'; 
    exit; 
} 

$data = array(); 
foreach($metars as $metar) { 
    $data[] = $metar->nodeValue; 
} 

echo '<pre>'; 
print_r($data);