PHP variables how to line up in the foreground HTML textarea and how to change the line changes in the PHP background to get

This article mainly introduces the PHP variable in the foreground HTML textarea how to wrap and change the line changes in the PHP background, has a certain reference value, now share to everyone, the need for friends can refer to

The problem seems simple and easy. Looks like a change line <br/> Not to be able to, but, really did not imagine in so simple ah ah ah ah Ah!!!

First, line-break

Old practice: Based on thinkphp, the array is taken out from Redis, displayed in the foreground, but wrapped.

Background:

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function Tags_keywords () {           $this->showheadertitle (' tags_keywords ');         $redis = D ("Redis");         $keywords _list = $redis->smembers ("Budou:segmentation:sourse"); Gets the data and wraps the display in the foreground textarea.         $this->assign (' keywords_list ', $keywords _list);         $this->display ();    }

Front desk:

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<textarea name= "Keywords_area" style= "Overflow:auto; Display:inline; width:884px; height:298px; "rows=" 4 "cols=" >  <volist name= ' keywords_list ' id= ' key ' >  {$key}\r\n      //useless  </volist>  </textarea>

Finally found whether add \ r \ n or <br/> will not work. I'm out of my mind. Completely.

Originally, this \ r \ n should be added to the PHP code. The front desk only needs to read it. Wipe.

Again:

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function Tags_keywords () {                   $this->showheadertitle (' tags_keywords ');                 $redis = D ("Redis");                 $keywords _list = $redis->smembers ("Budou:segmentation:sourse");                 $textarea = "";                 foreach ($keywords _list as $value) {                         $textarea. = $value. " \ n ";                 }                 $this->assign (' keywords_list ', $textarea);                 $this->display ();            }

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<textarea name= "Keywords_area" style= "Overflow:auto; Display:inline; width:884px; height:298px, "rows=" 4 "cols=" >{$keywords _list}</textarea>

That's just right. There is also a little <textarea> content </textarea>. The contents of the content are written in one line, otherwise, there will be spaces in the page display.

Second, PHP gets the content of Texteara in the line

In the foreground Texteara after the line, commit, PHP through $_post[' Texterea '] to get the string, is to be processed, or get a whole string.

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function Modify_keywords_list () {                   $keywords _post = $_post[' Keywords_area '];                 $keywords _post = nl2br ($_post[' Keywords_area ');  Replace line with <BR/>                 $keywords _post = explode ("<br/>", $keywords _post);//Then use <br/> as the delimiter to become an array. Although it becomes an array, or value or there is a space, to go to the space                 foreach ($keywords _post as $key) {                            if (trim ($key)) {  //remove whitespace.                                 $redis->sadd ("Budou:segmentation:sourse", Trim ($key));//go to space.                          }                   }                          }

1. First Use the PHP function: nl2br () to convert the line break to <br/>

2. Use the PHP function: Explode (' <br/> ', $data) to split the array.

3. Then use the PHP function: Trim (), and remove the space for each value.

Get....

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