The PHP character filtering function removes the last comma (rtrim) of the string)

The PHP character filter function removes the last comma of the string. it is easier to use the built-in functions of php to solve the problem,

Trim filters both ends of a string,
Rtrim filters the tail of the string, = chop ()
Ltrim filters the string header.

You can only use str_replace to filter the Middle Keys in a string.
For example,

PHP code

The code is as follows:

$ Str = '1970 ,';
Echo rtrim ($ str ,',');

Rtrim instance code 2

The code is as follows:

$ Text = "\ t \ tThese are a few words :)...";
$ Trimmed = rtrim ($ text );
// $ Trimmed = "\ t \ tThese are a few words :)..."
$ Trimmed = rtrim ($ text, "\ t .");
// $ Trimmed = "\ t \ tThese are a few words :)"
$ Clean = rtrim ($ binary, "\ x00.. \ x1F ");
// Trim the ASCII control characters at the end of $ binary
// (From 0 to 31 random sive)
?>