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。飞飞Asp技术乐园 语法 trim(string,charlist)
参数:
string:必需。飞飞Asp技.术乐园规定要检查的字符串。 charlist:
可选。规定要转换的字符串。飞飞Asp.技术乐园如果省略该参数,则删除以下所有字符: "\0" - NULL "\t" - tab "\n" - new line "\x0B" - 纵向列表符 "\r" - 回车 " " - 普通空白字符
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>
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