string trim ( string $str [, string $charlist = ” \t\n\r\0\x0B” ] )
此函数返回字符串 str 去除首尾空白字符后的结果。如果不指定第二个参数, trim() 将去除这些字符:
1.” ” (ASCII 32 (0x20)),普通空格符。
2. “\t” (ASCII 9 (0x09)),制表符。
3. “\n” (ASCII 10 (0x0A)),换行符。
4. “\r” (ASCII 13 (0x0D)),回车符。
5. “\0” (ASCII 0 (0x00)),空字节符。
6. “\x0B” (ASCII 11 (0x0B)),垂直制表符。
<?php $text = "\t\tThese are a few words :) ... "; $binary = "\x09Example string\x0A"; $hello = "Hello World"; $str = "##\t使用函数trim去掉字符串两端特定字符####"; $new_text = trim($text); $new_binary = trim($binary); $new_hello = trim($hello); $new_str = trim($str,"#"); echo $new_text; //These are a few words :) ... echo $new_binary; //Example string echo $hello; //Hello World echo $new_str; //使用函数trim去掉字符串两端特定字符 ?>
以上函数功能,同时适用于ltrim()、rtrim(),这2个函数
1、ltrim();删除字符串开头的空白字符(或其他字符)
2、rtrim();删除字符串末端的空白字符(或者其他字符)
以上是PHP函数trim()实例的详细内容。更多信息请关注PHP中文网其他相关文章!