How to use implode() function to connect characters in php

In phpimplode() function combines the array elements into a string, which is exactly the same as the explode function. Let’s take a look at a few implode function example.

Syntax

implode(separator,array) //array is an array and separator is a separator.

Example

//链接搜索条件
$wheresql = implode(' AND ', $wherearr); //链接搜索条件
 function simplode($ids) {
return "'".implode("','", $ids)."'";
}
   $itemidarr = array(); //初始化itemidarr数组
  if(empty($_POST['item'])) {  //判断提交过来的是否存在待操作的记录，如果没有，则显示提示信息并退出
   showmessage('space_no_item');
  }
  $itemidstr = simplode($_POST['item']); //用逗号链接所有的操作ID
  //对提交的数据进行检查

Instance code:

$catidarr = array();
if(!empty($t1)) $catidarr[] = '＼''.$t1.'＼'';
if(!empty($t2)) $catidarr[] = '＼''.$t2.'＼'';
if(!empty($t3)) $catidarr[] = '＼''.$t3.'＼'';
$catidstr = implode(' , ', $catidarr); //用逗号链接所有的操作ID

SQL statement example:

SELECT uid, name, namestatus FROM ".tname('space')." WHERE uid IN (".simplode($uids).")

Example, batch Delete data

SQL: $SQL="delete from `doing` where id in ('1,2,3,4')";

Data is separated by commas.

Form:

action="?action=doing" method="post">

< ;/form>

Okay $ID_Dele=$_POST['ID_Dele'] will be an array. Although PHP is weakly typed, it is not as weak as ASP. ASP can delete directly:

SQL="delete from [doing] where id in ('"&ID_Dele&"')". But PHP cannot put $ID_Dele directly into it. Because $ID_Dele is not '1,2,3,4', because $ID_Dele is an array with keys and values.

Okay, it’s not difficult in PHP. There happens to be a function: implode(), that’s right. A function that has exactly the opposite function to split()explode(). The latter two are separated by a certain character (such as a comma), while the former can be spliced ​​into a string.

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