Question

我正在尝试从少数外部网站获取图片，因为我正在尝试为我的项目开发链接共享网站。我用curl将文件下载到本地服务器，但getimagesize仍然很慢（30秒）。我是php的新手任何帮助将不胜感激。这是代码：

function check_url($value)
{
$value = trim($value);
if (get_magic_quotes_gpc()) 
{
    $value = stripslashes($value);
}
$value = strtr($value, array_flip(get_html_translation_table(HTML_ENTITIES)));
$value = strip_tags($value);
$value = htmlspecialchars($value);
return $value;
}   

$curl = curl_init();

$temp_file = tempnam(sys_get_temp_dir(), 'link');
$fp = fopen($temp_file, "w");
curl_setopt ($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_FILE, $fp);

curl_exec ($curl);
curl_close($curl);

///
$html = file_get_contents($temp_file);
fclose ($fp);
unlink($temp_file);

if($html) {
//parsing begins here:
$doc = new DOMDocument();
@$doc->loadHTML($html);
$nodes = $doc->getElementsByTagName('title');

 //get and display what you need:
 $title = $nodes->item(0)->nodeValue;
 $metas = $doc->getElementsByTagName('meta');

 for ($i = 0; $i < $metas->length; $i++)
 {
 $meta = $metas->item($i);
 if($meta->getAttribute('name') == 'description')
 $description = $meta->getAttribute('content');
 }

 // fetch images
 $image_regex = '/<img[^>]*'.'src=[\"|\'](.*)[\"|\']/Ui';
 preg_match_all($image_regex, $html, $img, PREG_PATTERN_ORDER);
 $images_array = $img[1];

 ?>
 <div class="images">
<?php
 $k=1;
 for ($i=0;$i<=sizeof($images_array);$i++)
{
if(@$images_array[$i])
{
    if(@getimagesize(@$images_array[$i]))
    {
        list($width, $height, $type, $attr) =   getimagesize(@$images_array[$i]);
        if($width >= 80 && $height >= 80 ){

        echo "<img src='".@$images_array[$i]."' width='100' id='".$k."' >";

        $k++;
        }
    }
}
}

?>




<input type="hidden" name="total_images" id="total_images" value="<?php echo --$k?>" />
</div>
<div class="info">

    <label class="title">
        <?php  echo @$title; ?>
    </label>
    <br clear="all" />
    <label class="url">
        <?php  echo substr($url ,0,35); ?>
    </label>
    <br clear="all" /><br clear="all" />
    <label class="desc">
        <?php  echo @$description; ?>
    </label>
    <br clear="all" /><br clear="all" />

    <label style="float:left"><img src="prev.png" id="prev" alt="" /><img src="next.png" id="next" alt="" /></label>

    <label class="totalimg">
        Total <?php echo $k?> images
    </label>
    <br clear="all" />

</div>
<?php
} else {
echo "Please enter a valid url";
}
?>

Answer 1

这并不奇怪。您正在遍历所有这些图像。下载这些图像然后获取它们的大小可能需要很长时间。

充其量，您可以异步加载这些图像并缓存结果。

从本地服务器缓慢getimagesize

1 个答案: