PHP4用户手册:函数->trim

技术2022-05-11 119

trim

(PHP 3, PHP 4 >= 4.0.0)

trim -- 去除一个字符串开始和结尾的空白

描述

string trim (string str [, string charlist])

注意：第二个参数用在PHP 4.1.0

这个函数返回str字符串被去除首尾空白后的新字符串。不带第二个参数trim() 将去除下列字符：

" " (ASCII 32 (0x20)), 空格；

"/t" (ASCII 9 (0x09)), 制表符；

"/n" (ASCII 10 (0x0A)), 换行符；

"/r" (ASCII 13 (0x0D)), 回车符；

"/0" (ASCII 0 (0x00)), 空字符；

"/x0B" (ASCII 11 (0x0B)), 垂直制表符。

你可以通过charlist参数指定你想去除的字符。Simply list all characters that you want to be stripped. With .. you can specify a range of characters.

例1. trim()例子

<?php $text = "/t/tThese are a few words :) ... "; $trimmed = trim($text); // $trimmed = "These are a few words :) ..." $trimmed = trim($text," /t."); // $trimmed = "These are a few words :)" $clean = trim($binary,"/0x00../0x1F"); // trim the ASCII control characters at the beginning and end of $binary // (from 0 to 31 inclusive) ?>

参见ltrim()和rtrim().

专利

最新回复(0)

PHP4用户手册:函数-&gt;trim

trim

描述

专利

PHP4用户手册:函数->trim