string trim ( string $str [, string $charlist = ” 	
 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. “	” (ASCII 9 (0x09)),制表符。 3. “
” (ASCII 10 (0x0A)),换行符。 4. “
” (ASCII 13 (0x0D)),回车符。 5. “ ” (ASCII 0 (0x00)),空字节符。 6. “x0B” (ASCII 11 (0x0B)),垂直制表符。<?php
    $text = "		These are a few words :) ...  ";
    $binary = "x09Example stringx0A";
    $hello = "Hello World";
    $str = "##	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) 以上就是PHP函数trim()实例的详细内容,更多请关注php中文网其它相关文章!  |