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PHP regular method to get all image addresses on the page, _PHP tutorial

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Release: 2016-07-12 08:56:28
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php正则取得页面所有的图片地址,

PHP regular method to get all image addresses on the page, _PHP tutorial
<?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;
}
?>
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PHP regular method to get all image addresses on the page, _PHP tutorial

/PHP regular method to get all image addresses on the page, _PHP tutorial"'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);
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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 regular method to get all image addresses on the page, _PHP tutorial
<?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);
?>
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PHP regular method to get all image addresses on the page, _PHP tutorial


结果

PHP regular method to get all image addresses on the page, _PHP tutorial
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"
  }
}
 
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PHP regular method to get all image addresses on the page, _PHP tutorial

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*&rdquo;?([^>"s]+)&rdquo;?[^>]*>)/im', &lsquo;<a href=&rdquo;$2&Prime;>$1</a>', $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

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/1112055.htmlTechArticlephp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)...
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