php method to remove the last character of the string: 1. Use the substr function to remove the last character of the string; 2. Use the rtrim function to remove the last character of the string; 3. Use "rtrim($str,$last_char) ;" method removes characters at the end of a string.
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php Remove the characters at the end of the string
$str = '123,234,345,';
echo $str,'<br/>';
//1、使用substr()函数实现去除字符串末尾字符
echo substr($str,0,-1),'<br/>';//123,234,345
//2、使用rtrim()函数实现去除字符串末尾字符
//2.1、已知末尾字符
echo rtrim($str,','),'<br/>';//123,234,345
//2.2、不知道末尾字符，需先获取末字符
$last_char=$str{strlen($str)-1}; // ','
//或者： $last_char=substr($str,-1); // ','
echo rtrim($str,$last_char);//123,234,345Supplement:
Several uses of curly braces in php:
//1、 {} 表示程序块的开始和结束：if{} while{} switch(){}等
//2、 {}用来表示字符串下标
$str = 'hello';
echo $str[0],'<br>';// h
echo $str{0},'<br>';// h
// 在字符串的变量的后面跟上{}花括号和方括号一样都是把某个字符串变量当成数组处理
//3、分离变量
$s='aaa';
echo "${s}bbb<br/>";//等同于"$s.bbb" => "aaa.bbb" 结果输出：aaabbb
// 防止变量名和后面的字符串合并成一个变量名，变成$aaabbbThe above is the detailed content of How to remove the end of string in php. For more information, please follow other related articles on the PHP Chinese website!
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