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HomeBackend DevelopmentPHP Tutorial求问一个正则表达式的问题

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:
求问一个正则表达式的问题 


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] => 求问一个正则表达式的问题
$url=$_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] => 求问一个正则表达式的问题
$reg="/<img  src="/static/imghwm/default1.png"  data-src="../Images/Album Cover/album_012.jpg"  class="lazy" \s*.*src\s*=\s*[\"|\']?\s*([^ alt="求问一个正则表达式的问题" >\"\']*)/i";$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] => 求问一个正则表达式的问题         )

    [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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