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PHP中ltrim与rtrim去除左右空格及特殊字符实例,ltrimrtrim

本文实例分析了PHP中ltrim与rtrim去除左右空格及特殊字符的用法。分享给大家供大家参考,具体如下:

一、PHP中ltrim定义如下:

ltrim(string,charlist)

参数说明:

string 必需。规定要检查的字符串。

charlist
可选。规定从字符串中删除哪些字符。如果省略该参数,则移除下列所有字符:
"\0" - NULL
"\t" - 制表符
"\n" - 换行
"\x0B" - 垂直制表符
"\r" - 回车
" " - 空格

二、PHP中rtrim定义如下:

rtrim(string,charlist)

参数说明如下:

string 必需。规定要检查的字符串。

charlist
可选。规定从字符串中删除哪些字符。如果省略,则移除下列所有字符:
"\0" - NULL
"\t" - 制表符
"\n" - 换行
"\x0B" - 垂直制表符
"\r" - 回车
" " - 空格

三、用法示例如下:

<&#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;>

运行结果如下:

(:@_@ 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 

希望本文所述对大家PHP程序设计有所帮助。

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  • PHP使用trim函数去除字符串左右空格及特殊字符实例
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  • php中的实现trim函数代码
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