Question

我创建了一个PHP脚本，它将从Flickr帐户中获取图像，然后以专辑形式显示它们。一切都很好，除了每张专辑之前发生的这个讨厌的小0。这是一个示例HTML文档：

<html>

<head>
    <script type="text/javascript" src="chrome-extension://bfbmjmiodbnnpllbbbfblcplfjjepjdn/js/injected.js"></script>
    <style type="text/css"></style>
</head>

<body>0
    <div class="album" id="72157643471292484">
        <img class="album-thumnail" src="https://farm4.staticflickr.com/3702/13647757594_46fb10ca56_m.jpg">
        <div class="album-information">
            <div class="album-header">
                <p class="album-title">Set 1</p><span class="album-contents">3</span>
            </div>
            <p class="album-description"></p>
        </div>
    </div>0
    <div class="album" id="72157643469056814">
        <img class="album-thumnail" src="https://farm4.staticflickr.com/3739/13647432073_9c11d27b7c_m.jpg">
        <div class="album-information">
            <div class="album-header">
                <p class="album-title">Test Gallery 1</p><span class="album-contents">9</span>
            </div>
            <p class="album-description">Bing Backgrounds</p>
        </div>
    </div>
</body>

</html>

在上面的代码中，在标签关闭之后，一旦关闭，就会有第二个0.它们位于专辑的开始标记之前，我不知道为什么。我不认为我已经提到过如何调用它，但它是通过jQuery的AJAX调用的。

这是PHP

<?php

$api = '';
$userid = '';
$apiurl = 'https://api.flickr.com/services/rest/?';
$responseformat = 'php_serial';

//Initiate the PHP script
echo createHTML();


function createHTML(){
    return '<div class="gallery">'.createCollectionHTML().'</div>';
}

function createCollectionHTML(){
    $html_resp = '';
    $collections = getCollections();
    foreach($collections['collections']['collection'] as $c){
        $html_resp = $html_resp.'
        <div class="collection">
        <div class="coll-header">
            <div class="text-header"><span>'.$c['title'].'</span></div>
        </div>
        <div class="coll-albums">'.getAlbumHTML($c).'</div></div>';
    }
    return $html_resp;
}

function getAlbumHTML($coll_data){
    $album_html = "";
    $album_num = 0;
    foreach($coll_data['set']as $s){
        $album_num++;
        $album_html_lower = '<div id="'.$s['id'].'"><img class="album-thumnail" src="'.getSetThumbnailURL($s['id']).'"/><div class="album-information"><div class="album-header"><p class="album-title">'.$s['title'].'</p><span class="album-contents">'.getSetContentsNum($s['id']).'</span></div><p class="album-description">'.$s['description'].'</p></div></div>';
        if($album_num == 1){
            $album_html = $album_html + '<div class="album-row">'.$album_html_lower;
        }else if($album_num == 2){
            $album_html = $album_html + $album_html_lower;
        }else if($album_nnum == 3){
            $album_html = $album_html + $album_html_lower.'</div>';
            $album_num = 0;
        }
    }
    return $album_html;
}

function getSetContentsNum($id){
    $set_data = getSetInformation($id);
    return $set_data['photoset']['count_photos'];
}
function getRequest($arguments){
        global $apiurl;

    //Enocdes the arguments for JSON request
    $encoded_params = array();
    foreach ($arguments as $k => $v){
        $encoded_params[] = urlencode($k).'='.urlencode($v);
    }

    //Join the url via arguments and $apiurl variable
    $url = $apiurl.implode('&', $encoded_params);

    //Request the file, unserialize the JSON response
    $rsp = file_get_contents($url);
    $rsp_obj = unserialize($rsp);

    //Checks if response was okay, else, returns failure message
    if($rsp_obj['stat']== 'ok'){
        return $rsp_obj;
    }else{
        echo 'requestfail|message:'.$rsp_obj['message'];
        return;
    }
}

function getCollections(){
    global $api;
    global $userid;
    global $responseformat;   

    $args = array(
        'method' => 'flickr.collections.getTree',
        'api_key' => $api,
        'user_id' => $userid,
        'format' => $responseformat
        );
       return getRequest($args);
}

function getSetInformation($id){
        global $api;
    global $userid;
    global $responseformat; 

    $args = array(
        'method' => 'flickr.photosets.getInfo',
        'photoset_id' => $id,
            'api_key' => $api,
    'format' => $responseformat
        );
       return getRequest($args);
}

function getSetPhotos($id){
        global $api;
    global $userid;
    global $responseformat; 
        $args = array(
        'method' => 'flickr.photosets.getPhotos',
        'photoset_id' => $id,
        'extras' => 'url_s',
        'media' => 'photos',
            'api_key' => $api,
    'format' => $responseformat
        );
       return getRequest($args);
}

function getSetThumbnail($id){
    $set_pics = getSetPHotos($id);
    return $set_pics['photoset']['photo'][0];
}

function getSetThumbnailURL($id){
    $thumbnail_info = getSetThumbnail($id);
    return $thumbnail_info['url_s'];
}
?>

我认为值得注意的是，如果我放置一个＆＃34; 1＆＃34;在$ album_html变量中或在$ album_html_lower的开始标记之前放置1，在任何一种情况下都将0替换为1，但是，我无法完全删除0.所以我该如何删除它？

Answer 1

您使用加号连接字符串，而不是使用点：

// Wrong
$album_html = $album_html + $album_html_lower;
// Right
$album_html = $album_html . $album_html_lower;

加号仅用于算术运算，这使得PHP希望将变量转换为整数。不以整数开头的字符串将强制转换为0，从而生成您提供的HTML。用点替换加号，问题就解决了。

您也可以用速记符号替换这些语句：

$album_html .= $album_html_lower;

.=运算符将右手值连接到左手值的末尾。

在旁注中，getAlbumHTML()中的第三个if语句包含＆＃39; n＆＃39;变量名$album_nnum中的内容太多。

正在放置PHP随机0

1 个答案: