


PHP regular method to get all image addresses on the page, _PHP tutorial
php正则取得页面所有的图片地址,

<?php //取得页面所有的图片地址 function getimages($str) { $match_str = "/((http://)+([^ rn()^$!`"'|[]{}<>]*)((.gif)|(.jpg)|(.bmp)|(.png)|(.GIF)|(.JPG)|(.PNG)|(.BMP)))/"; preg_match_all ($match_str,$str,$out,PREG_PATTERN_ORDER); return $out; } ?>

/"'s]*)/i
,我使用kindeditor保存文章,但是需要取出第N个图片的地址作为文章的标志图片,文章代码(内容的html)保存到数据库一个字段,然后图片地址保存到另外一个字段.我就是使用上面的正则解决的.
我说明下,上面的地址是直接获取img标签内src属性的值.在使用该正则的php页面访问该路径如果能找到图片的话,可以直接使用,如果不能,你可以使用preg_match_all将所有地址先保存到数组,然后处理路径,比如获取文件名称(不含路径部分),然后重新组成url,再删除图片.
我的例子:
preg_match_all("/<img .*srcs*=s*["|']?s*([^ alt="PHP regular method to get all image addresses on the page, _PHP tutorial" >"'s]*)/i",str_ireplace("\","",$content),$arr);
呵呵 我的内容部分被php给加上转义了,所以我需要先把去除,str_ireplace("\","",$content),然后将匹配的内容保存到$arr数组(二维的).
$arr[1]就是存储该路径的数组.
实例

<?php $ext = 'gif|jpg|jpeg|bmp|png';//罗列图片后缀从而实现多扩展名匹配 by http://www.111cn.net 绿色软件 $str = '<p><img title="绿色软件" alt="绿色软件" onload="ResizeImage(this,860)" src="http://www.111cn.net /data/soft_img/2010091101619.jpg" /></p><p><img title="绿色软件" alt="绿色软件" onload="ResizeImage(this,860)" src="http://www.111cn.net /data/soft_img/2010091029938.jpg" /></p><p><img title="绿色软件" alt="绿色软件" onload="ResizeImage(this,860)" src="http://www.111cn.net /data/soft_img/2010092839019.jpg" /></p>'; preg_match_all("/(href|src)=(["|']?)([^ "'>]+.($ext))\2/i", $str, $matches); var_dump($matches); ?>

结果

array(5) { [0]=> array(3) { [0]=> string(57) "src="http://www.111cn.net /data/soft_img/2010091101619.jpg"" [1]=> string(57) "src="http://www.hzhuti.com/sonyericsson/w715/ 2010091029938.jpg"" [2]=> string(57) "src="http://www.111cn.net /data/soft_img/2010092839019.jpg"" } [1]=> array(3) { [0]=> string(3) "src" [1]=> string(3) "src" [2]=> string(3) "src" } [2]=> array(3) { [0]=> string(1) """ [1]=> string(1) """ [2]=> string(1) """ } [3]=> array(3) { [0]=> string(51) "http://www.111cn.net /data/soft_img/2010091101619.jpg" [1]=> string(51) "http://www.111cn.net /data/soft_img/2010091029938.jpg" [2]=> string(51) "http://www.111cn.net /data/soft_img/2010092839019.jpg" } [4]=> array(3) { [0]=> string(3) "jpg" [1]=> string(3) "jpg" [2]=> string(3) "jpg" } }

PHP正则匹配图片并给图片加链接详解
$newstext=preg_replace(preg_replace('/(<img [^ alt="PHP regular method to get all image addresses on the page, _PHP tutorial" >]+srcs*=s*”?([^>"s]+)”?[^>]*>)/im', ‘<a href=”$2″>$1</a>', $newstext);
1.preg_replace和str_replace的区别:
str_replace只是纯字符替换,而preg_replace才是正则替换
2.$0,$1,$2等的说明:
$0指的是被整个模式所匹配的文本;
$1指的是首个 ( ) 引用的串;
$2指的是第二个()引用的串; 以此类推

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