PHP img url 与 preg_match答案

【问题标题】：PHP img url with preg_matchPHP img url 与 preg_match
【发布时间】：2014-05-03 02:53:07
【问题描述】：

只想获取 img url

"//lh5.googleusercontent.com/-0qGW989h9DM/AAAAAAAAAAI/AAAAAAAAG3g/aXkL8mbboKY/photo.jpg"

来自

    <meta itemprop="name" content="Saurabh Sharma">
<meta itemprop="description" content="Works at Google as Product Manager. Lives in San Francisco. Lived in New Delhi - Mumbai - Canonsburg - Pittsburgh - Austin - San Francisco.">
<meta itemprop="image" content="//lh5.googleusercontent.com/-0qGW989h9DM/AAAAAAAAAAI/AAAAAAAAG3g/aXkL8mbboKY/photo.jpg">
<meta itemprop="url" content="https://plus.google.com/+SaurabhSharma">
</head>
<body class="Td lj">
<input type="text" name="hist_state" id="hist_state" style="display:none;">

如何用 preg_match 做到这一点？

【问题讨论】：

标签： php preg-match file-get-contents

【解决方案1】：

为了获取图片内容，使用如下

$data = '<meta itemprop="name" content="Saurabh Sharma"><meta itemprop="description" content="Works at Google as Product Manager. Lives in San Francisco. Lived in New Delhi - Mumbai - Canonsburg - Pittsburgh - Austin - San Francisco."><meta itemprop="image" content="//lh5.googleusercontent.com/-0qGW989h9DM/AAAAAAAAAAI/AAAAAAAAG3g/aXkL8mbboKY/photo.jpg"><meta itemprop="url" content="https://plus.google.com/+SaurabhSharma"></head><body class="Td lj"><input type="text" name="hist_state" id="hist_state" style="display:none;">';

preg_match('/<meta itemprop=\"image\" content=\"(.*?)\">/i', $data, $matches);

$matches 将返回一个数组

Array
(
    [0] => 
    [1] => //lh5.googleusercontent.com/-0qGW989h9DM/AAAAAAAAAAI/AAAAAAAAG3g/aXkL8mbboKY/photo.jpg
)

【讨论】：

内容和 itemprop 应该被翻转然后它应该可以工作
print_r($matches[1]) 会给你图片网址
有没有办法在结果前添加http:？