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php trim 删除空格字符与指定字符

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Release： 2016-06-02 09:14:11
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以前没看trim函数以为他只能删除空白,今天发现它还可以删除"" - null.

"t" - tab ,"n" - new line ,"x0b" - 纵向列表符 ,"r" - 回车 ," " - 普通空白字符,以及用户指定字符.

定义和用法:trim() 函数从字符串的两端删除空白字符和其他预定义字符,可选,规定要转换的字符串,如果省略该参数,则删除以下所有字符:

"" - null,"t" - tab,"n" - new line,"x0b" - 纵向列表符,"r" - 回车," " - 普通空白字符,实例代码如下:

{$str}
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"; // "; echo $str1;


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