PHP removes the last character from a string_PHP tutorial

Original string 1,2,3,4,5,6,
Remove the last character "," and the final result is 1,2,3,4,5,6
The code is as follows:

$str = "1,2,3,4,5,6,";
$newstr = substr($str,0,strlen($str)-1);
echo $newstr;
//echo 1,2,3,4,5,6

The function that comes with the system can achieve this effect, two methods:
1) substr($str, 0, -1)
2)rtrim($str, ",")

Excerpted from 〃Style ひぐ

http://www.bkjia.com/PHPjc/478188.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/478188.htmlTechArticleOriginal string 1,2,3,4,5,6, remove the last character, and the final result is 1,2,3,4,5,6 The code is as follows: $str = 1,2,3,4,5,6,; $newstr = substr($str,0,strlen($str)-1); echo $newstr; //echo 1...