PHP中ltrim与rtrim去除左右空格及特殊字符实例,ltrimrtrim
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:
<?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," @_@:) "); ?>
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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