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PHP regular operation of any attribute in img (taking attributes, regular replacement, etc.)

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2016-07-25 09:00:051074browse
  1. $as_message = preg_replace('//i', "", $as_message);
  2. $as_message = preg_replace('//i', "", $as_message);
  3. ?>
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另一种固定图片的js方法:

  1.  
  2. <script></li> <li>var abc=document.getElementById("abc");</li> <li>var imgs=abc.getElementsByTagName("img");</li> <li>for (var i=0,g;g=imgs[i];i++)</li> <li>g.onload=function(){if (this.width>600){this.width=600}else{if (this.height>600)this.height=600}}</li> <li></script>
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数据库内容字段中存储的是原图的路径(当然还有其他文字内容啦,内容里插图时,存的是图片路径),但前台想使用缩略图,以下是网上找到的详细解决方法,参考其解决了我的问题。

  1. /*

  2. 正则取图片img标记中的任意属性
  3. 搜集整理 程序员之家 http://bbs.it-home.org
  4. */
  5. $word = '

    111 22

    中国人
    ';
  6. //取width
  7. preg_match('//i',$word,$matches);
  8. echo $matches[1];

  9. //取height

  10. preg_match('//i',$word,$matches);
  11. echo $matches[1];

  12. //取src

  13. preg_match('//i',$word,$matches);
  14. echo $matches[1];

  15. /*正则替换去掉或改变图片img标记中的任意属性*****/

  16. $str = '

    111 22

    中国人
  17. 31313 224344

    1212121
    ';

  18. //改变src属性(此处将原来的src="/upload/images/bbb.jpg"改变为src="/upload/_thumbs/Images/bbb.jpg")

  19. print preg_replace('/()/i',"$左手写情_thumbs/Images/${3}",$str);

  20. /*改变src属性,

  21. 此处将原来的src="/upload/images/bbb.jpg"改变为src="/upload/_thumbs/Images/bbb.jpg",并舍弃宽和高
  22. (比如你想在前台显示缩略图,但数据库中存储的是原图的路径。为什么要舍弃宽高??你缩略图啊!还是原图的宽高,会怎样???)
  23. */
  24. print preg_replace('/(/i',"$左手写情 ${2}_thumbs/Images/${3}>",$str);
  25. ?>

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