php使用substr和substr_replace函数删除字符串最后一个字符

1、使用substr或mb_substr删除字符串最后一个字符

$string = \"This is test string..\";
echo $string . \"\\n\";

// substr function   http://www.manongjc.com
echo \"substr: \" . substr($string, 0, -1);

echo \"\\n\";

// mb_substr multibyte version
echo \"mb_substr: \" . mb_substr($string, 0, -1);

echo \"\\n\";

输出结果：

This is test string..
This is test string.
This is test string.

2、使用substr_replace删除字符串最后一个字符

$string = \"This is test string..\";
echo $string . \"\\n\";

// substr_replace function
echo \"substr_replace: \" . substr_replace($string ,\"\",-1);

echo \"\\n\";

输出结果：

This is test string..
This is test string.