想匹配一个网页地址中的所有图像地址,写了正则表达式如下:
$reg="/<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" \s*.*src\s*=\s*[\"|\']?\s*([^ alt="求问一个正则表达式的问题" >\"\']*)/i";
为什么像如下的图像文件地址:
<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" alt="求问一个正则表达式的问题" >
只能匹配到:
![]()
回复讨论(解决方案)
正则没错,建议贴出你的代码以供分析。
$reg="/<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" \s*.*src\s*=\s*[\"|\']?\s*([^ alt="求问一个正则表达式的问题" >\"\']*)/i";$s = '<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" alt="求问一个正则表达式的问题" >';preg_match_all($reg, $s, $m);print_r($m);Array
(
[0] => Array
(
[0] =>
$url=$_POST['url']; $rs=parse_url($url); $main_url=$rs['host']; $baseurl=substr($url,0,strrpos($url, '/')+1); $message=file_get_contents($url); $reg="/<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" \s*.*src\s*=\s*[\"|\']?\s*([^ alt="求问一个正则表达式的问题" >\"\']*)/i"; preg_match_all($reg, $message, $matches); for($i=0;$i
下面是对$img_array的处理了,试了一下新浪首页,百度啊什么的,好多图片地址无法匹配出来,最明显的就是图片路径里包含空格的
$reg="/<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" \s*.*src\s*=\s*[\"|\']?\s*([^ alt="求问一个正则表达式的问题" >\"\']*)/i";$s = '<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" alt="求问一个正则表达式的问题" >';preg_match_all($reg, $s, $m);print_r($m);Array
(
[0] => Array
(
[0] =>
$reg="/<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" \s*.*src\s*=\s*[\"|\']?\s*([^ alt="求问一个正则表达式的问题" >\"\']*)/i";$s = '<img src="/static/imghwm/default1.png" data-src="../Images/Album Cover/album_012.jpg" class="lazy" alt="求问一个正则表达式的问题" >';preg_match_all($reg, $s, $m);print_r($m);Array
(
[0] => Array
(
[0] =>)
[1] => Array
(
[0] => ../Images/Album Cover/album_012.jpg
)
)
很奇怪。。。我用的chrome,输出如下:
Array( [0] => Array ( [0] =>
数组没有完整输出。。后面的括号都没了通过“查看网页源代码”观看

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