PHP trim() 函数
定义和用法
trim() 函数从字符串的两端删除空白字符和其他预定义字符。
语法
trim(string,charlist)
参数 | 描述 |
---|---|
string | 必需。规定要检查的字符串。 |
charlist | 可选。规定要转换的字符串。如果省略该参数,则删除以下所有字符:
|
例子
例子 1
<html> <body> <?php $str = " Hello World! "; echo "Without trim: " . $str; echo "<br />"; echo "With trim: " . trim($str); ?> <body> <html>
输出:
Without trim: Hello World! With trim: Hello World!
HTML 源码:
<html> <body> Without trim: Hello World! <br />With trim: Hello World! </body> </html>
例子 2
<?php $str = "\r\nHello World!\r\n"; echo "Without trim: " . $str; echo "<br />"; echo "With trim: " . trim($str); ?>
输出:
Without trim: Hello World! With trim: Hello World!
HTML 源码:
<html> <body> Without trim: Hello World! <br />With trim: Hello World! </body> </html>