How to remove leading and trailing spaces in php
在php中,可以通过trim()函数来去掉首尾空格;该函数的作用是移除字符串两侧的空白字符或其他预定义字符,其使用语法是“trim(string,charlist)”,参数string规定要检查的字符串,参数charlist规定从字符串中删除哪些字符,如果省略该参数,则可移除空格、回车、换行、垂直制表符等预定义字符。
本文操作环境:Windows7系统、PHP8、Dell G3电脑。
php去掉首尾空格:
trim() 函数移除字符串两侧的空白字符或其他预定义字符。
相关函数:
ltrim() - 移除字符串左侧的空白字符或其他预定义字符。
rtrim() - 移除字符串右侧的空白字符或其他预定义字符。
语法
trim(string,charlist)
参数
string 必需。规定要检查的字符串。
charlist 可选。规定从字符串中删除哪些字符。如果省略该参数,则移除下列所有字符:
"\0" - NULL "\t" - 制表符 "\n" - 换行 "\x0B" - 垂直制表符 "\r" - 回车 " " - 空格
实例
移除字符串两侧的空格:
<?php $str = " Hello World! "; echo "Without trim: " . $str; echo "<br>"; echo "With trim: " . trim($str); ?>
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