Examples of removing left and right spaces and special characters between ltrim and rtrim in PHP, ltrimrtrim_PHP tutorial

Examples of ltrim and rtrim in PHP to remove left and right spaces and special characters, ltrimrtrim

This article analyzes the usage of ltrim and rtrim in PHP to remove left and right spaces and special characters. Share it with everyone for your reference, the details are as follows:

1. The definition of ltrim in PHP is as follows:

ltrim(string,charlist)

Parameter description:

string Required. Specifies the string to check.

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

2. The definition of rtrim in PHP is as follows:

rtrim(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

3. Usage examples are as follows:

The running results are as follows:

<&#63;php
$str=" (:@_@ 帮客之家 提供大量优秀脚本及素材供读者下载 \n\n @_@:)  ";
 echo ltrim($str);
 echo "<br>";
 echo ltrim($str," (:@_@ ");
 echo "<br/>";
 echo rtrim($str);
 echo "<br>";
 echo rtrim($str," @_@:) ");
&#63;>

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

(:@_@ 帮客之家 提供大量优秀脚本及素材供读者下载 @_@:) 
帮客之家 提供大量优秀脚本及素材供读者下载 @_@:) 
(:@_@ 帮客之家 提供大量优秀脚本及素材供读者下载 @_@:)
(:@_@ 帮客之家 提供大量优秀脚本及素材供读者下载 

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