PHP trim() 函数-PHP String 函数-编程文章分享

函数原型

/**

* 移除字符串两侧的空白字符或其他预定义字符

* @link http://php.net/manual/en/function.trim.php

* @param string $str 输入的字符串

* @param string $charlist [optional] 通过参数charlist指定想要删除的字符。使用..，指定字符的范

* @return string 返回字符串移除字符串两侧的空白字符后的结果。如果不指定第二个参数，trim() 将去除这些字符

" " (ASCII 32(0x20)), 普通空白字符

"\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)), NUL空字节符

"\x0B" (ASCII 11(0x0B)), 垂直制表符

* @since 4.0

* @since 5.0

function trim ($str, $charlist = " \t\n\r\0\x0B") {}

函数示例

<?php

$str = "Hello World!";

echo trim($str,"Hello!"); //输出 World

PHP trim() 函数