用php获取字符串中的第一个图像 [英] Getting the first image in string with php

问题描述

我正试图从我的每个帖子中获取第一张图片。如果我只有一个图像，下面这段代码很有效。但如果我有一个以上的它给了我一个图像，但并不总是第一个。

I'm trying to get the first image from each of my posts. This code below works great if I only have one image. But if I have more then one it gives me an image but not always the first.

我真的只想要第一张图片。很多时候第二张图片是下一个按钮

I really only want the first image. A lot of times the second image is a next button

$texthtml = 'Who is Sara Bareilles on Sing Off<br>
<img alt="Sara" title="Sara" src="475993565.jpg"/><br>
<img alt="Sara" title="Sara two" src="475993434343434.jpg"/><br>';

preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $texthtml, $matches);
$first_img = $matches [1] [0];

现在我可以把这个$ first_img放在简短的描述前面

now I can take this "$first_img" and stick it in front of the short description

<img alt="Sara" title="Sara" src="<?php echo $first_img;?>"/>

推荐答案

如果您只需要第一个源标记， preg_match 应该代替 preg_match_all ，这对你有用吗？

If you only need the first source tag, preg_match should do instead of preg_match_all, does this work for you?

<?php
    $texthtml = 'Who is Sara Bareilles on Sing Off<br>
    <img alt="Sara" title="Sara" src="475993565.jpg"/><br>
    <img alt="Sara" title="Sara two" src="475993434343434.jpg"/><br>';
    preg_match('/<img.+src=[\'"](?P<src>.+?)[\'"].*>/i', $texthtml, $image);
    echo $image['src'];
?>

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