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php中使用preg_match_all匹配文章中的图片示例 - 站长搜索
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php中使用preg_match_all匹配文章中的图片示例

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2014-12-05 11:52:15 转载来源: 网络整理/侵权必删

本文为大家讲解的是php中使用preg_match_all匹配文章中的图片示例,感兴趣的同学参考下。 preg_match_all 函数: int preg_match_all ( string pattern, string subject, array matches [, int flags] )执行一个全局正则表达式匹配 在 subject 中搜索所有与 pattern 给出的正则表达式匹配的内容并将结果以 flags 指定的顺序放到 matches 中

本文为大家讲解的是php使用preg_match_all匹配文章中的图片示例,感兴趣的同学参考下。

preg_match_all 函数:

int preg_match_all ( string pattern, string subject, array matches [, int flags] )执行一个全局正则表达式匹配
在 subject 中搜索所有与 pattern 给出的正则表达式匹配的内容并将结果以 flags 指定的顺序放到 matches 中。    
搜索到第一个匹配项之后,接下来的搜索从上一个匹配项末尾开始。  
flags 可以是下列标记的组合(注意把 PREG_PATTERN_ORDER 和 PREG_SET_ORDER 合起来用没有意义): 
PREG_PATTERN_ORDER  对结果排序使 $matches[0] 为全部模式匹配的数组,$matches[1] 为第一个括号中的子模式所匹配的字符串组成的数组,以此类推!

例子:


<?php
$con = file_get_contents("http://www.xxx.net/news/jb-1.html");
$pattern="/<[img|IMG].*?src=['|"](.*?(?:[.gif|.jpg|.png]))['|"].*?[/]?>/";
preg_match_all($pattern,$con,$match);
print_r($match);
?>

结果:


Array
(
    [0] => Array
        (
            [0] => <img src="http://www.xxx.net/usr/themes/dddefault/images/logo.png" alt="phperz" />
            [1] => <img style="display: block; margin-left: auto; margin-right: auto;" title="phperz上线了" src="http://www.xxx.net/usr/uploads/2012/09/531656480.jpg" alt="phperz上线了2" />
            [2] => <img style="display: block; margin-left: auto; margin-right: auto;" src="http://www.xxx.net/usr/uploads/2012/09/2647136297.jpg" alt="875EA1C00E50B4542797E24FA6E7E1F2.jpg" />
        )
    [1] => Array
        (
            [0] => http://www.xx.net/usr/themes/dddefault/images/logo.png
            [1] => http://www.xx.net/usr/uploads/2012/09/531656480.jpg
            [2] => http://www.xx.net/usr/uploads/2012/09/2647136297.jpg
        )
)

标签: php 使用 preg match all 匹配 文章 中的 图片


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