Question

将所有img标记替换为锚标记，其中img src属性值应为锚标记href属性值。我无法理解如何编写模式来匹配整个并替换img标签并将href值返回锚标签作为后续处理函数中img标签的src属性值。

我在下面尝试过：

$pattern = '/<img[^>]+>/i'; 
$callback_fn = 'process';   
$content = preg_replace_callback($pattern, $callback_fn, $string);
function process($matches) 
{
        print_r($matches);
    return "&nbsp;&nbsp;<a href='http://mywebsite.com/".$matches[0]."'> <font color ='black' >View Image</font>&nbsp;&nbsp;</a>";
}       
echo $content;

例如：

$string = "this is dummy string <img src="imageone.jpg" alt="" /> this is another sentesnces <img src="imagetwo.jpg" /> this is third one";

输出结果为：

this is dummy string View Image this is another sentesnces View Image this is third one

此处，查看图像与

链接

http://mywebsite.com/<img src="imageone.jpg" alt="" />

但我想要这个：

http://mywebsite.com/imageone.jpg

Answer 1

试试这个

$pattern = '/<img.+src=(.)(.*)\1[^>]*>/iU';
$callback_fn = 'process';
$string = 'this is dummy string <img src="imageone.jpg" alt="" /> this is another sentesnces <img src="imagetwo.jpg" /> this is third one';
$content = preg_replace_callback($pattern, $callback_fn, $string);
function process($matches)
{
    return "&nbsp;&nbsp;<a href='http://mywebsite.com/".$matches[2]."'> <font color ='black' >View Image</font>&nbsp;&nbsp;</a>";
}
echo $content;

使用<font>代替<span>代码，因为<font>已被弃用。

用锚标记替换所有img标记

1 个答案: