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php rtrim函数在处理时去掉字符t是怎么回事啊

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Release: 2016-06-23 13:42:30
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  <?php  $str='left.htm';     $str=rtrim($str,'.htm');     echo $str;
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输出结果为lef。
怎么解决这个问题???????


回复讨论(解决方案)

用str_replace 替换得了。

因为 rtrim 的第二个参数是字符列表,而不是字符串

lef t.htm 的 t 也在列表 .h tm 中,当然也会被删掉

trim 的第二个参数是charlist 表示字符的集合 left的t在'.htm'中


如果只是取得文件名字 用basename即可

$file = "left.htm";

echo basename($file,'.htm');//left









$str='left.htm';echo substr($str,0,strpos($str,'.'));
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