PHP uses trim function to remove left and right spaces and special characters from strings_php tips

The example in this article describes how PHP uses the trim function to remove left and right spaces and special characters from a string. Share it with everyone for your reference, the details are as follows:

The trim() function in PHP is defined as follows:

trim(string,charlist)

The parameter description is as follows:

string Required. Specifies the string to check.

charlist

Optional. Specifies which characters are removed from the string. If omitted, all following characters are removed:
" "t" - tab
"n" - newline
"x0B" - vertical tab
"r" - carriage return
" " - space

The sample code is as follows:

<&#63;php
 $str="\r\r(:@_@  脚本之家 提供大量优秀脚本与素材下载  @_@:)   ";
 echo trim($str);
 echo "<br/>";
 echo trim($str,"\r\r(: :)");
&#63;>

The running results are as follows:

(:@_@ 脚本之家 提供大量优秀脚本与素材下载 @_@:)
@_@ 脚本之家 提供大量优秀脚本与素材下载 @_@

I hope this article will be helpful to everyone in PHP programming.