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PHP regular code example to obtain all image addresses on the page

怪我咯
Release: 2023-03-12 17:46:02
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这篇文章主要介绍了PHP正则获取页面所有图片地址 的相关资料,需要的朋友可以参考下

<?php
//取得页面所有的图片地址
function getimages($str)
{
$match_str = "/((http://)+([^ rn()^$!`"&#39;|[]{}<>]*)((.gif)|(.jpg)|(.bmp)|(.png)|(.GIF)|(.JPG)|(.PNG)|(.BMP)))/";
preg_match_all ($match_str,$str,$out,PREG_PATTERN_ORDER);
return $out;
}
?>
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/"'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*["|&#39;]?s*([^>"&#39;s]*)/i",str_ireplace("\","",$content),$arr);
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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 = &#39;gif|jpg|jpeg|bmp|png&#39;;//罗列图片后缀从而实现多扩展名匹配 by http://www.jb51.net 绿色软件
$str = &#39;<p><img title="绿色软件" alt="绿色软件" onload="ResizeImage(this,860)" src="http://www.jb51.net /data/soft_img/2010091101619.jpg" /></p><p><img title="绿色软件" alt="绿色软件" onload="ResizeImage(this,860)" src="http://www.jb51.net /data/soft_img/2010091029938.jpg" /></p><p><img title="绿色软件" alt="绿色软件" onload="ResizeImage(this,860)" src="http://www.jb51.net /data/soft_img/2010092839019.jpg" /></p>&#39;;
preg_match_all("/(href|src)=(["|&#39;]?)([^ "&#39;>]+.($ext))\2/i", $str, $matches);
var_dump($matches);
?>
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结果

array(5) {
[0]=>
array(3) {
[0]=>
string(57) "src="http://www.jb51.net /data/soft_img/2010091101619.jpg""
[1]=>
string(57) "src="http://www.hzhuti.com/sonyericsson/w715/ 2010091029938.jpg""
[2]=>
string(57) "src="http://www.jb51.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.jb51.net /data/soft_img/2010091101619.jpg"
[1]=>
string(51) "http://www.jb51.net /data/soft_img/2010091029938.jpg"
[2]=>
string(51) "http://www.jb51.net /data/soft_img/2010092839019.jpg"
}
[4]=>
array(3) {
[0]=>
string(3) "jpg"
[1]=>
string(3) "jpg"
[2]=>
string(3) "jpg"
}
}
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PHP正则匹配图片并给图片加链接详解

$newstext=preg_replace(preg_replace(&#39;/(<img[^>]+srcs*=s*”?([^>"s]+)”?[^>]*>)/im&#39;, ‘<a href=”$2″>$1</a>&#39;, $newstext);
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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

有关PHP正则获取页面所有图片地址的知识,小编就给大家介绍到这里,希望对大家有所帮助!

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