下面本文章来给各位同学总结了几种php去除字符串首尾中英文空格程序实例,这里有用正则替换与trim系列函数删除,下面我们来看看。
例1.trim函数删除空格
trim()函数用于去除字符串开始位置以及结束位置的空格,并返回去掉空格后的字符串。语法如下:
string trim(string str[,string charlist]);
ltrim()函数用于去除字符串左边的空格或指定字符串。语法如下:
string ltrim(string str[,string charlist]);
rtrim()函数用于去除字符串右边的空格和特殊字符。语法如下:
string rtrim(string str[,string charlist]);
代码如下 | 复制代码 |
$a="(a,b,c,)"; echo $a." "; //输出:(a,b,c,) $b=trim($a,"()"); //去除字符串首尾含有的字符“(”或“)” echo $b." "; //输出:a,b,c, $c=trim($a,"(,)"); //去除字符串首尾含有的字符“(”、“,”或“)” echo $c." "; //输出:a,b,c ?> |
输出结果:
(a,b,c,)
a,b,c,
a,b,c
在sql中函数trim()用途为去除首尾空格,ltrim()为去除字符串左侧空格,rtrim()为去除字符串右侧空格。
例2.利用str_replace正则替换
代码如下 | 复制代码 |
function mbTrim($str) |
例3.str_replace正则替换
代码如下 | 复制代码 |
|

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